VW A4: BEW TDI Camshaft Position Sensor Replacement (Part 1)

[@TIIRONC5H]

Hey can i ask u someth8ng in my golf 4 Tdi 81kw i dont have that Vakum ball Code engine AhF do u know Its Ok to not have ?

[@EXOVCDS]

The service info I found does not show a vacuum reservoir. So I guess that the AHF engine does not need it. Service info only shows 2 vacuum consumers... the brake booster and the EGR vacuum diaphragm. It looks like the turbo has a wastegate (boost pressure opens the wastegate) and is not a VNT turbo (variable nozzle) that is vacuum controlled.

[@TIIRONC5H]

@EXOVCDS yeh I think its turbo but not Like Real garret etc its Stock engine old AHN Thnks

[@tacoman864]

Would this cause the car to die right after starting unless i hold the key longer or hit the fuel pedal?

[@EXOVCDS]

No... it should not cause stalling. It will cause longer "cranking time". You can disconnect the sensor and the engine should still start. Disconnect it and see if things (starting issue) change. Is the fuel pump in the fuel tank working? Year, make, model, engine (PD TDI)?

[@longjonhothan6963]

Mine was faulty and caused stalling mate

[@tacoman864]

@@longjonhothan6963 that is what it was I replaced the cam shaft position sensor and problem solved

[@Super-lucky-7777]

My car suffered from stalling/cutting out on acceleration, replaced both sensors, not the problem is back and worst than ever.

[@weeniewawa]

thanks for this video only took like 10 minutes after I got out there. the hardest thing was the grommet, but even that was not bad

[@EXOVCDS]

Thanks for sharing your success! Spread the word... I've got 600 videos with useful information (at least I think it's useful, up to the viewer to decide I guess). Thanks for watching & taking the time to comment!

[@kevorkd123]

Hi do you know if this is the same for 2012 vw tdi ?

[@EXOVCDS]

Depends on where you are. North America stopped getting PD TDI''s in 2007 (I think). After that they are all 2.0L common rail TDI's. Completely different engines. Why don't you tell me what make, model vehicle you have... the problem you are having and the engine production code (if you know it). The production code is a 3 to 4 digit code that can be found on the timing belt / chain cover or on the valve cover (depending on the type of engine). Post a video of your engine on your channel... if you can't find the code, so that I can see which engine it is.

[@kevorkd123]

Hi 2013 vw Passat tdi common rail P03400, P034100 , intermittent crank , no start , after a couple of times it will catch , i am in Ontario, just wondering If I can change the sensor without taking belt off , Identfix says you have to , what is your experience? Thank you

[@EXOVCDS]

@kevorkd123 I have not yet had to replace a cam sensor on a common rail tdi. Yes, service info says to remove the belt. Next time I do a timing belt, I will check if it can be removed with belt in place.

[@kevorkd123]

I did the job today there is no way to change the sensor without taking belt and whole timing rear cover , so I cut the old sensor , cut the new sensor and fished it in , and resodered it , stupid design , car starts fine now , I have to use it a couple of days and see

[@EXOVCDS]

@kevorkd123 thank you for the update!

[@BMACVAGS]

Hey Thomas, was this car still running or was it a non starter??

[@EXOVCDS]

Running... cam sensor does not cause no start.

[@matthewhunter5491]

Would this be the same for a 2013 Jetta tdi?

[@EXOVCDS]

Yes... but service info suggests that the timing belt needs to be removed in order to remove the sensor (on the common rail TDI, this video is not a common rail TDI).

[@roggy44]

nice video, i have a seat altea 1.9tdi that takes longer to start when hot do you think this cam sensor could be the cause?

[@johaneckerdal3926]

Hello Thomas, nice video! My 2013 VW Passat 2.0 Tdi dies 1-2 seconds after start, only when warm and not always, and after 1-4 tries, it starts ok and run smooth. Would you suspect this sensor for the issue I have? I have shifted the crank shaft sensor already, still have the problem. Now I am thinking of the cam shaft sensor. I have vcds, and no fault code what so ever. Can you give an advice how to proceed? Many thanks.

[@EXOVCDS]

I'm not sure.... if you don't try to start the engine after it is warm and try to start it once it is cold, it starts and stays running? I'd use VCDS to look at all the different sensor data to see if you can spot anything that looks strange, like wrong temperature (coolant or fuel), fuel pressure specified vs actual etc. Camshaft or crankshaft sensors on this engine will / should usually set a fault code when the ECM does not see a correct signal / mismatched. Sometimes its easier to find a problem after it gets worse (looooong cranking time or complete no-start).

[@johaneckerdal3926]

@@EXOVCDS Thanks Thomas for advice, thats very kind of you. Yes, when cold, never fails to start. When warm, only intermittently, and after few tries stays running. I will check these sensor data. Cranking time has never been long so far, starts but dies again. So will also wait until always dies after 1-2 seconds if sensor data does not show any obivuous deviation from normal.

[@johaneckerdal3926]

@@EXOVCDS , the fault has been localized and fixed. Ended up in complete failure to start which pointed to ECU failure.. Indeed ECU had to be replaced. The old one bad corrosion and water ingress, really stupid location of the unit where it can be exposed to water easily in case of dirt/leaves block the drainage.

[@EXOVCDS]

@@johaneckerdal3926 Thank you for the update!

[@johaneckerdal3926]

@@EXOVCDS Sorry to bother you again. With the new ECU, engine runs well. But today the issue with start failure when warm sadly showed up again. I uploaded a video, first try - dies, second try - runs smooth. Can you tell by the sound when it dies if there is a mismatch in fuel injection (due to cam shaft sensor failure?)? Just fetching for all ideas where to look for as there is no fault code in any module seen by vcds/ross tech. kzbin.info/www/bejne/n3_RnGpombF1h80

[@johnkearns2086]

Hi Everyone, just a bit of info: I have a 2008 1.9tdi Leon. Looks like the same engine and sensor. My car is always slow to start when the engine is warm. Starts on the first turn when it is cold. Then once last winter after a 2.5hour drive in cold & snow it refused to start again at all. I had to wait about 15 minutes before it would start. A mechanic told me this is due to the camshaft position sensor, apparently there is a problem with a lot of them; they start to fail when they heat up with the engine. He confirmed this with diagnostics, he could read the sensor fine until the engine heated up. I thought it was a difficult job to replace, but I'll definitely have a go now that I've seen this. Thanks! (I'll update when I change the sensor)

[@EXOVCDS]

The engine should run with the sensor disconnected... if it does not, then the camshaft position sensor is not the problem. The crankshaft position sensor however could be.

[@johnkearns2086]

I wonder do I have two problems then? The camshaft sensor causing the slow start, and a separate issue that caused it to not start that one time? I'll look into it a bit more on vcds maybe. Either way the camshaft sensor was confirmed as faulty so I'll do a bit of investigation to see if it's the sensor or maybe just wire damage somewhere. Either way, thanks for the video, and the advice, it's a great help. Keep it up 👍

[@EXOVCDS]

Yes, slightly extended cranking time is normal with faulty cam sensor. Replace it and see if the intermittent "no start" returns.

[@buugm8792]

Hello I got a 2005 jetta with 2.0 and I put a 2000 motor on it but the 05 sensor harness has a 2 wire connector and the 00 have 3 wire conector ...how can I fix that without changing the head??? Thanks

[@EXOVCDS]

Uriel Garcia Which connector? Where? Post a picture or video link here.

[@Britcheflee]

If you are sure the sensor is dead and you have disconnected wire from harness could you not just cut the wire and pull the sensor out - you would have to fish the new one through but removal would be very simple.

[@EXOVCDS]

Some people are smarter than others. =) Sure, thanks for sharing the tip... and thank you for watching!

[@faz7862]

Hi my Golf mk5 is throwing the following code: 27746 Camshaft postiionsensor (g40) Open or short toPlus p1338 Upper Limit reached Any ideas?

[@EXOVCDS]

***** Hi, probably a bad camshaft position sensor... unless the cam / crank timing is wrong. wiki.ross-tech.com/wiki/index.php/17746/P1338/004920 Did this happen all of a sudden? Or after a service? How many miles on the engine? Which engine? PD TDI or Common Rail TDI?

[@faz7862]

***** At first the exhaust was blowing so I had the exhaust flex and exhaust gas temp sensor replaced. Then i took the car shopping and it wouldnt start. After waiting for 15 mins the car started (this pattern of not starting and then starting after a while keeps repeating). I just started it up and its sounding pretty rough like the exhaust was chugging like it sounds blocked. its a 1.6 petrol FSI engine in the UK with 89000 miles. The diagnostic also showed this code: 19498 Heater Regulation Implausible Signal p3042 Upper limit reached Intermittent

[@EXOVCDS]

***** Hi, sorry... I thought it was a TDI because you posted under a TDI video. Hard starting & rough running can be a sign of incorrect camshaft & crankshaft timing. I'm not familiar with the 1.6 FSI engine, but I can look up information if need be. If the engine has a timing chain, the chain could have jumped or has too much slack. If the engine has a timing belt, the belt could have jumped or has too much slack. Have someone check the cam & crank timing before doing anything else. Do you know the engine production code? BLF maybe?

[@EXOVCDS]

***** I watched the video and left a message.... if it has variable valve timing, could be that the phaser (the part that determines position of the camshaft) is sticking. I'll look for and will send info to tomorrow morning (my time).

[@albertoverastegui168]

el escaner marca en mi auto que este sensor esta mal , pero no marca el icono de chek engin ni nada no falla solo que derrepete tarda para arrancar . que falla presenta este sensor malo ?

[@EXOVCDS]

Puedes comprobar el sensor con un multímetro. Me gusta esto: kzbin.info/www/bejne/d2e7h2iuZZpjasU Motor de gasolina, pero operación similar del sensor.

[@insanitysplunder]

What's the part number for the sensor? I ordered one and it was the wrong part. Apparently there are two different sensors for this engine code.

[@EXOVCDS]

What's your engine code? BEW? Year of vehicle?

[@EXOVCDS]

www.ecstuning.com/Volkswagen-Jetta_IV--TDI/Engine/Electrical/Sensors/Camshaft_Position/

[@EXOVCDS]

john lund Any update on the engine code? Does it look like the sensor in the link I provided?

[@dwtshopenjoy660]

Do you have crankshaft replacement video???

[@EXOVCDS]

No, not yet.... sorry.

[@Justin-lf5qt]

Hi, I have a 2006 audi 2.0T quattro, its giving me code P0008 saying the camshaft position sensor is going off. Is it the same problem as in the video or do you know of another issue that may be causing it?

[@EXOVCDS]

+Justin over Not sure... the information that I have does not list a p0008 code. Could be a problem with the chain tensioner (sample video): kzbin.info/www/bejne/j2rXi3aFeMd0rac send a message to those guys and ask them what codes (if any) they had. Problems with the chain are supposedly common (I have yet to run into this issue myself).

[@Justin-lf5qt]

+Thomas EXOVCDS Will do, thanks for the tip

[@EXOVCDS]

+Justin over Found this: www.gerritspeek.nl/vag-com_dtc-16392.html (right click in page and choose google translate... I'm using google chrome web browser, not sure if internet explorer or firefox do the same)

[@stuzman52]

That looks like some tedious work to work through that hole to get a sensor out. Good job.

[@E69apeTheMatrix420]

I have scanner saying cam sensor, crank no start issue! Replaced and still no start. I read your comment below and you say cam sensor isn't no start issue? I was under the impression it was? I replaced but still no start and still cam sensor on scanner! I watched again to see if there is a spacer on it but no.

[@EXOVCDS]

Henry Phillips Year, make, model, engine?

[@ronaldo27y]

Hi thomas. i have been tasked to replace the same sensor on a 2.0tdi BMR if i am correct. can the sensor on the 2.0 tdi twin cam be done without removing the timing belt?

[@EXOVCDS]

+Daud Amin I'll see if I can find some info... we don't have the BMR engine in North America... I'll get back to you.

[@ronaldo27y]

+Thomas EXOVCDS Thank you very much. i have had a look at the diagrams on elsawin and i dont seem to have the write up or process for this specific engine

[@EXOVCDS]

+Daud Amin If I looked it up correctly: fkh161.ca/VW/BMR.pdf Part #22

[@EXOVCDS]

+Daud Amin Read part description for #22

[@ronaldo27y]

+Thomas EXOVCDS that is correct it is part 22. g40 sensor. when looking at the engine infront of me its hard to tell if the timing belt has to be removed.

[@krishnagandla2727]

hi i have 2008 skoda Laura ambient 1.9 its starting too cranks late starting am already cam sensor changed. but same issue please help me

[@EXOVCDS]

We don't have Skoda in Canada... check for fault codes in the engine computer. If there is a fuel pump in the fuel tank, make sure that it is working. Maybe the high pressure fuel pump is no good.

[@krishnagandla2727]

@@EXOVCDS thanks thomas

[@krishnagandla2727]

One more issue glow plugs power supply issue. Relay has been changed. But no power supply

[@EXOVCDS]

One of the glow plug relay (module) terminals should have battery power all the time... if not, check the 50A fuse that's somewhere in your car.

[@Dwbrown29]

Hi my 2003 golf tdi's battery died, I got a jump, and thereafter all kinds of issues. I replaced the battery and now i have the glow plug lights flashing and the vehicle shuts down after driving 20 plus miles. It wont start until cooling off for about 5 min and then it will shut down again. if i let it cool off for about an hour, I can drive 20 plus miles again. I replaced the 109 relay. i got a ton of codes when i hooked up my ob2 reader. p0672, p0673, p0674, p0225, p0228, p0321, p0128, p0725. And now also it doesnt seem to be shifting into the last gear, so the rpms rev up at 60mph. and it drives sluggish when you start off. Did i fry a bunch of relays when i got a jump or could one problem cause all of this? Please help Sir. thanks, Derek

[@EXOVCDS]

I have jump started many vehicles and have never had any issues because of it... but yes, if the cables were attached wrong, electrical faults can surface. I will reply again tomorrow, as my pc is off for the evening (using my phone to reply now). Check all the battery connections... at the battery and where the cables attach to the engine & body. Also the fuse box on top of the battery. Look for overheating signs on the cables / fuses.

[@Dwbrown29]

They were hooked up correctly

[@Dwbrown29]

I'll check. Thanks man.

[@EXOVCDS]

Derek Brown I haven't looked at the code definition for the codes you listed. Will do so tomorrow to see if I can suggest anything else to you.

[@Dwbrown29]

Ok. Thank you

[@DIETRYING001]

am getting an implausible signal code from this sensor on the same engine, the only code and the car won't start, have changed the sensor and its had a new cam pulley, the wiring from the ecu side is 2 wires have 4-5volts and the other is grounded. the car will not start, just cranks over and over. the timing has been checked twice. any ideas? don't have vcds

[@EXOVCDS]

engine should run with sensor disconnected (IIRC, since this one did)... disconnect it, does it? cam & crank timing was checked how? correct locking tools used?

[@DIETRYING001]

Engine won't run with disconnected still already tried. Yes timing was checked with correct tools and can pulley bolts are roughly centralised. Sounds healthy when turning over but not getting any fuel as runs briefly on easy start. Engine has a rebuild by someone else. Think I'm gonna check compression and leak down next. Reason for rebuild is threw a rod on number 2 I believe. It's the bxe engine code if I remember rightly.

[@EXOVCDS]

andrew page I'm away from my desktop pc until Monday.... can look up info then. What scan tool are you using? Some generic don't show all codes that are stored. Make sure that the in-tank pump is working... the engine will run if it is not, BUT, once prime is lost (due to opening the fuel system for example).

[@DIETRYING001]

Have taken the send pipe off from the tank to the fuel filter and it is spraying fuel out when cycling ignition so seems ok. Have tried priming fuel system many times also. I have tried snap on, Delphi and Bosch kts. I'm saving for my own vcds. All tools are saying g40 implausible signal. Thanks Thomas will wait to hear from you. It's also had a brand new genuine crank sensor when the gearbox was reinstalled invade i didn't mention that.

[@EXOVCDS]

+andrew page It's frustrating when you know that the engine ran before... in those cases I usually say that it will have to be something that was related to the work that was done. Knowing now that you know what you are doing (in most cases when someone asks me a question, they don't know left from right), it's a matter of elimination... definitely a fuel problem / control, if it runs on a separate fuel source.

[@themoldyhunter]

what size socket do you need to remove the sensor???

[@EXOVCDS]

2:15 shows 10mm bolt head

[@EXOVCDS]

2:37 says to use a 10mm socket

[@mohamed.bouchair]

Thx +Thomas EXOVCDS Great Video, What were the symptoms the car was suffering from ? Did you get any ECU fault codes that pointed you to a faulty CPS? Thanks a lot.

[@EXOVCDS]

Mohamed BOUCHAÏR Beginning of the video shows the fault code... I checked the signal from the sensor, had no signal, wiring was ok, so it got a new sensor. Somewhat long cranking time was the only symptom.

[@mohamed.bouchair]

Thanks for for your reply, I was so excited to see the replacement method that I skipped the intro. Sorry for that ;)

[@roggy44]

Hi, thanks for replying its a pd engine BJB 2005 no carbon all cleaned timing should be ok not long had the cambelt done ,what can i check on the fuel pump? one other thing it just started to do is on idle 900rpm it will suddenly go up to 1100rpm and stay there until its turned off next start its ok? could that be a maf problem dont you just love intermittent faults

[@JMVDourado]

With this sensor malfunctioning, the car still starts but it will take a couple of seconds more to start. And that is because the ECU doesn't have the information of camshaft position so it can fire the right injector, and are going to rely only on the crankshaft sensor to start.

[@EXOVCDS]

Yup.

[@buugm8792]

Hi thomas ..yes both are gas engines and the 2000 is a AEG Am not sure about the05 the vin # 3VWSA69M35M060872

[@EXOVCDS]

Uriel Garcia I can't break the vin to get the engine code. If the '05 has variable valve timing... if you use the AEG head, you will get fault codes relating to the variable valve timing not working. The camshaft position sensor of all engines only use 3 wires. I need to see pictures or video of what you see. email me or post a video link here.

[@qfina]

Great video thanks, I'd drop that bolt for sure! One question, what is that snap-on tool you are using to unclip things etc, that's something that I always find a chore, but that tool looks pretty useful - do you have the part number?

[@EXOVCDS]

Hose pick tool set: buy1.snapon.com/catalog/item.asp?item_ID=646487&group_ID=681665 Thanks for watching!

[@qfina]

Fantastic thank you very much, subscribed!

[@ivayloplamenovpetrov4772]

Hello Thomas and thanks for your video!!! I am in the UK, gf has a Seat Altea 2008 BKD engine. I'm no mechanic, but seen this sensor for around £40. She's been quoted £650! To remove cam belt and install new cambelt sensor plus camshaft sensor. Now we can't afford this right now. My concern is can I just replace it, or does it have other links to car firmware? The following I saw in a different video, precisely for the same car model: "car won't run without it..... and it's not possible to fix it yourself because this sensor is part of SOC having RAM, ROM, CPU, and it looks like it needs engine model specific firmware..to communicate with engine ECU." Thanks!!!

[@EXOVCDS]

The BKD engine seems to be similar to the BEW in my video... service info seems to suggest having to remove the timing belt, but some illustrations show the belt in place. So I'm not 100% sure if it is as easy as in my video. As far as firmware, the service info does not say anything. fkh161.ca/VW/BKD_G40.pdf

[@EXOVCDS]

Does yours look like the images in the PDF? Send me pictures of the engine bay with the top timing belt cover off... so that I can see.

[@ivayloplamenovpetrov4772]

@@EXOVCDS thanks for your reply. We're isolated now and left the car in a relative's house. I'll try to get pictures once back. Thanks

[@albertoverastegui168]

hola , que falla presenta el auto cuando falla este sensor ?

[@EXOVCDS]

Menos potencia y luz del motor encendida en el grupo de instrumentos.

[@kidoretro]

my car won't start when this sensor is plugged in but when i remove it , it starts but idles terrible. What could it be. Its a 2001 vw passat 1.8t.

[@EXOVCDS]

kidoretro Check your camshaft / crankshaft timing (timing belt position)... any stored fault codes?

[@kidoretro]

both the cam and crank are lined up perfectly. I don't have a vagcom to scan for codes, but i will do so. Also i installed the sensor upside down and it started and idle nicely. thank for the reply.

[@EXOVCDS]

+kidoretro Cam sensor cover upside down? You mean it's right side up now and working? Or you installed it upside down and now it starts? can you post a video and explain your concerns in the video?

[@kidoretro]

+Thomas EXOVCDS okay i will make a video. But when i put the sensor right side up the way its suppose to go the car doesn't start but if i flip it and put it upside down it starts

[@EXOVCDS]

+kidoretro The trigger wheel is mounted by a bolt... was the trigger wheel installed 180 out?

[@FoxTopMusic1]

would this be the same in a 99 2.0 gas?

[@EXOVCDS]

No, you have to remove the timing belt & camshaft sprocket.

[@FoxTopMusic1]

well I'm trying to replace the cam shaft sensor. once i have all this apart how do you readjust the tension when its all back together or is it as simple as lining up the tensioner marks and torquing it back down. thanks for taking the time to reply as your probably at work right now lol. i could not ring any videos of you changing a cam sensor.

[@FoxTopMusic1]

find* not ring sorry

[@EXOVCDS]

Yes, working... but lunch time now. Just make sure that the camshaft & crankshaft marks align where they are supposed to be, then tighten the belt tensioner to where it is supposed to be, no further adjustment is needed. If your car is of the A3 mk3 body style, then the camshaft position sensor is in the distributor.

[@FoxTopMusic1]

i loosened the belt tensioner and got every thing together but, when i hold the tensioner alinement arrow up and tighten it, it falls back down and is way out. I'm not sure why? and thanks again for the help.

[@stuzman52]

It's probably because you know you're filming it and then all things don't go smoothly. I believe that's normal for everyone.

[@banterman]

All due respect chap there's so much fucking writing on the screen you can barely see anything. Ditch the watermarks.

[@EXOVCDS]

This is one of my old videos... watch the new ones and you will see that all "helpful" posts have been taken into consideration. Thank you for your help... protecting videos from being copied and used elsewhere was my main concern back then. If you have questions,just ask... it can be quicker to get help that way, rather than have to explain video related issues.

[@buugm8792]

Sorry I was talking about the camshaft sensor. ...

[@EXOVCDS]

Both are gasoline engines yes? What are the engine codes for both engines? AEG, AVH etc? I need to look at wiring diagrams.

[@mittzlepick]

Hope to do this in 10min 10 seconds. Tour quick

[@EXOVCDS]

I'll cross my fingers for you. Thank you for watching!

[@Lewiseyers]

Put a rag under the bolt before removing or installing Just incase you drop it...!

[@EXOVCDS]

Thanks for the tip... it's the simple things that I sometimes (ok, always) forget to do! LOL

[@cristianavram1964]

Hi It’s possible to have black smoke in high rpm because of this sensor?

[@EXOVCDS]

I don't think so... do you have a cam sensor fault code? If the timing cam/crank timing is OK, then there should be no code. How bad is the black smoke? Do you have good boost? Not enough boost (air) can cause black smoke. Too much EGR flow can cause smoking.

[@cristianavram1964]

Thomas EXOVCDS Yes I have.I just replaced the timing belt after she slipped few teeth

[@EXOVCDS]

Cristian Avram Is the engine running smoothly? Maybe bent valves?

[@EXOVCDS]

Cristian Avram Cam timing +/- 3.0 degrees allowed.

[@cristianavram1964]

Thomas EXOVCDS Start and running very smoothly. Maybe the belt is too tight