P0606 - Car Won’t Start - Diagnostic Tips!

The dreaded P0606 - PCM/Internal Processor Fault can often lead to an engine ECU needing to be rebuilt - But don’t get caught out!! This code can also be caused by other issues on the vehicle. Tim’s here to run you through some of these causes so that you can be 100% in your diagnosis, saving time and money.
P0606 - PCM/Internal Processor Fault
Limp mode
Rough idle
Check engine light
Complete no start
www.ecutesting.com/categories...
#ecutesting #remanufacturing #P0606

[@FranOs-cy1dc]

very good job, excellent explanation

[@sollykhan2385]

Excellent tutorial explained well,with a touch of humour, please continue posting Tim, perhaps very soon your channel will get 2 Billion subscribers, maybe even become the most 'Googled ' on the internet 🙂

[@ricsi176]

Very Professional video!

[@gustiable]

greatly preciated it this was very useful 👌👏

[@ajmalrandathani6226]

Good presentation

[@ssnerd583]

DO NOT FORGET TO CHECK ALL YOUR HARNESS GROUNDS!!! Bad grounds can cause all sorts of electrical MADNESS!!

[@alvarocatanzano3603]

Excellent Videos!! we all learn a lot from you mate!...by the way what is a good scanner for Ford Territory 2004? Thanks Tim.

[@keauharada1762]

Hi thx for the vids! I have a P0606 code on my veloster and my obd2 is saying the ECM voltage is 10.2 and does that mean i just need to check for too high resistance in the fuses or the computer?

[@edgarromani8939]

our mind master knowledge thank you .

[@carlodonnell146]

Hi !!!!! An ECU that I purchased preprogrammed had that same fault code that you explained and all the info that I researched on it, said that it is an internal fault; the engine light stayed on permanently, but the engine started and ran and I even drove it around without any problems. I returned it and it is now repaired. I would still like to get my other ECU repaired some time to hold as a spare.

[@Ecutestinglimited]

Hi Carl. We would be more than happy to re-build your original ECU. If you email our technical support team at [e-mail] with details of your make and model of vehicle, the ECU part number and any fault codes or diagnostic information you can provide, then we will get back to you ASAP. Cheers.

[@replicant357]

Yes.. Awesome content. And perfect for the (new age) Modern day modifier DIY’er. And owning a R56 MCS , knowing how to do simple tests as you’ve shown on here is a BLESSING! Thank you all for this .. 😁

[@declansgamereview6523]

Hello - I have watched so many of your videos as no one else on KZbin or the net seems to understand a specific issue I have faced for 3 weeks now. P0606 ECM code on a K12 Micra DCI. Any ideas where to start, I checked most of the wires to the ECM but I dnt want to strip all the looms to look for shorts. Do you think a faulty sensor like the crank or cam will trigger the code or its a genuine short somewhere that I must look really hard to find. Trying to narrow the issue down. Greetings from South Africa

[@ahmedhmd7062]

Tank you sir

[@Jrpaperchaser]

My car has the autostop and it did the autostop at a light and didn’t come back on and the p06060 code came on but then went off and I drove fine 2 days after should I still take it into the shop?

[@joseperez-cp6mr]

Hi, I have a 2007 cls550 and my snap on spit the P0606 code, saying control module has an internal error. Any help ?or suggestions ?

[@DavidGutierrez-zi4dy]

THANKS

[@jamesoconnor3017]

Made up I found your channel, great tips ! I recently sent my Mercedes Viano abs pump to a company to be repaired, they sent it back saying it’s beyond repair. Would you guys be able to rebuild it? Cheers 👍

[@Ecutestinglimited]

Hi James, thanks for the kind words and we are glad you found the video helpful! With regards to your ABS unit, we do re-build Mercedes Viano units, but depending on the cause of the fault it may be that the unit is completely beyond repair. If you email us at [e-mail] with details of your fault (any fault codes, diagnostic information, etc), then we will get back to you asap whether we can offer a re-build solution or not. Cheers.

[@jamesoconnor3017]

@@Ecutestinglimited . Wow! Thanks for your reply , ok I’ll sort things ASAP as the car is not on the road at the moment. Iv fitted a second hand pump but needs to be reprogrammed. So I’ll probably try to get you guys to rebuild my old pump anyway! That’s if it’s not beyond repair? Thanks again, and I love the sense of humour in your videos too 😜👍

[@bensontemu9356]

Good🔥🔥🔥🔥

[@DonDamian]

So I have the p0606 code but it only comes on when I try to start my car and it also won’t start without a jump

[@user-qv7ju5zh2k]

Здравствуйте. Подскажите пожалуйста куда копать с такой ошибкой P0606 ECM/PCM processor. Last occurrence-plaust sibility

[@olivers4564]

Hi, I have a 2013 ford focus. It’s coming up with a po606 code. I’ve had a new battery put and driving fine for about 3 miles then the transmission fault came up again. When driving it the revs go up to 3000 and struggle,s to get up to the next gear. When I had the battery changed it was working fine. It’s a 1.6 auto, if it does need a new ECU how much will it cost to fix?

[@Ecutestinglimited]

Hi. Have you done another scan after changing the battery, and if so were there any additional fault codes?

[@hoodie8551]

This is my car how did you fix

[@kenthuntsingersr7501]

1997 powerstroke p0606 . after a long run and good and warm. If the truck is turned off it wont restart. If i disconnect the batteries then reconnect it will start and run fine until turned off again. If it sets overnight it still will not restart until the battery trick .

[@Ecutestinglimited]

Hi. We would recommend following all the steps in the video above to attempt to diagnose the fault. If you are still unable to rectify the fault then please contact our technical support team via email at [e-mail] with the details of your fault and your part number, and they will be able to assist you further. Cheers

[@walkingdeadalphaCO]

This was a very informative video. I have a 2011 ram 2500 Turbo diesel and the P0606 code has come up on my truck

[@Ecutestinglimited]

Hi Thomas. We are glad you found the video useful. If you have followed all the steps and are still experiencing a P0606 fault code, then please contact our technical support team via email at [e-mail] with the following details; Your make and model of vehicle, your ECU part number, the symptoms of your fault, and any diagnostics you have carried out. They will be happy to assist you further and advise you of any testing or re-build service we can provide. Cheers.

[@walkingdeadalphaCO]

@@Ecutestinglimited I got to check my batteries this week when I get a chance thankfully I watched this video if all else fails I will take it in

[@jrsoccer11276]

@@walkingdeadalphaCOwhat did it end up being ?

[@walkingdeadalphaCO]

@jrsoccer11276 so I found out something. I was buying el cheapo sensors on eBay. Wrong choice on my part. I went ahead and spent the money on quality sensors, and the codes went away. Also, my exhaust break is working well because now it's getting the right air ratio.

[@walkingdeadalphaCO]

@@jrsoccer11276 lesson here is... don't buy cheap parts unless you want more problems. Spend the money on quality parts.

[@amyreyes7012]

Would that be the problem with my 2018 Jeep compass. The dealership won’t help because I went over my mileage and warranty ended. My problem is that when they put the reader it won’t connect and won’t get any reading back. It’s not the batteries already checked that. I need my inspection sticker but can’t because of this.

[@gjmcustoms]

Amy, when the obd2 port won’t power a scanner usually it’s a blown fuse, check them

[@2B1ASK1G712]

What sensor is in the diagram at the 4:12 mark? I need to know bc my 2004 Envoy XUV shut off in traffic and won't start.

[@Ecutestinglimited]

Hi. The sensor we have used as an example in this video is the fuel rail pressure sensor, however there are many sensors in a vehicle that can cause a P0606 to occur. If it is a sensor causing the code, then you should have a secondary fault code specific to that sensor, so if you only have a P0606 then it is unlikely that the fault lies with any sensors.

[@akyak471]

My car don't start and comes up with the code P060C 00. The car is an Audi Q5 TFSI 2020. Any ideas?

[@sergioandresjovenquintero3055]

Could the ECU change the polarity of one sensor?

[@Ecutestinglimited]

Hi. We haven't encountered a faulty ECU reversing polarity of any sensors. It could be the test you are carrying out on the sensor is incorrect or the sensor itself is faulty. Cheers

[@ziyaratgul7993]

For a toyota you dont have to send in the new or used ecu for a full rebood or flash. Hotwire the pin #4 and #13 of obd2 and let it sit with ignition switch on position and let it figure everything out for about 30 minutes. Remove the pin used to hotwire the obd2 and go ahead start the car and hope for the best.

[@techalyzer]

I'll try this question here, haven't found an answer yet. I permanently connected my dashcam to the battery for continuous recording. I am no electrics/electronics beginner. With the camera screen turned off, the current drawn in total from the 60 Ah battery is very low, tens of milliamps, maybe less, I can't remember exactly, but I did the math. By my calculations, this means the battery should last at least 2 weeks like this, if not more. I understand that you can't go to 0% charge, as you still need a lot of juice to be left for the engine to start, but I don't understand having the battery die after 2 days with such a low load. If I leave my car parked for more than a day, dead battery, around 10.something V. I can barely start the engine, sometimes I need to push the car to get it going. Battery voltage is perfect, stays at about 12.9 after a longer drive, starts the engine in a fraction of a second, no issues whatsoever without the dashcam plugged in when parked. Plug in the dashcam, the battery dies like crazy. Something doesn't add up there for me... and I can't yet understand why this happens. Again, without the dashcam, the battery is just fine. Maybe it shows some lack of charge after a full week of only 5 minute drives, but nothing worse than that, and voltage stays over 12.6 at all times. Without the dashcam connected when parked...

[@crystrezerex2life]

What would be considered bad resistance while testing the fuse?

[@Ecutestinglimited]

A standard automotive fuse should have a resistance as close to 0 ohms as possible, and no more than 1 ohms. If the multimeter reads O.L then the fuse is blown. Hope this helps.

[@namethatcorn2879]

is the p06b8 the same code? i have a mk 3 st and it threw this code but same description

[@Ecutestinglimited]

Hi. P0606 and P06B8 aren't the same code, but they usually go hand in hand. If you have both a P0606 and P06B8 then we would still recommend completing the checks in this video to see if the codes clear. If they don't, or you just have the P06B8 code, then please contact our technical support team via email on [e-mail] with the following information. Codes can go hand in hand contact tech support. The make and model of vehicle, the symptoms of your fault, any fault codes present, and the part number printed on your ECU. They will advise you further. Thanks.

[@pawlinski74]

Hi I have a serious problem with my 2013 prius p0606 the car drives fine and sometimes gets crazy with no power stops with all waring lights, whats the name of the sensor You are checking on the video ? thks

[@Ecutestinglimited]

Hi. The sensor we are testing in this video is a fuel rail pressure sensor. However, if it is a faulty sensor causing the problem, then you should be getting a P0606 fault code alongside a secondary fault code for a particular sensor. If you are only getting a P0606 code without a secondary code, then it is unlikely the fault is being caused by a sensor. Hope this helps.

[@pawlinski74]

@@Ecutestinglimited the thing is im looking for a good electrician but cant find any one replaced the ecm computer and the module that goes to it to check if it fixed but not same thing happening that is that code plus car stops suddenly loosing power sometimes cant put it into parking or any gear then i unplug the battery for 5 min and later it drives for a while again im sick and confused the electrician cant help me hes stuck

[@Ecutestinglimited]

​@@pawlinski74 Hi. It sounds like the issue you're having is complex, are you just getting the P0606 fault code and what module is that code being stored in? Feel free to contact our technical support team with this information, at [e-mail] or contact us directly by phone: [phone], and they will assist you further. Cheers

[@moustaphacheva3757]

I have toyota corolla and i have 😊😊code number p0607, can I have the same symptoms?

[@Ecutestinglimited]

Hi. The P0606 and P0607 fault codes can share similar symptoms, however completing all the checks in this video is a good way to start the diagnosis.

[@moustaphacheva3757]

@@Ecutestinglimited thank you .

[@Keychaincustoms._43]

Can bad throttbody acuator cause tht code to

[@Ecutestinglimited]

Hi. If you have a P0606 and a secondary fault code relating to the throttle body then it would be worth investigating first as it could potentially cause the P0606 code to occur. However we would still recommend completing the checks outlined in the video if the P0606 code doesn't clear.

[@jonetrance4495]

hi i have a 2009 ford fiesta 1.6 tdci,i was driving it last week with no problems,then out of the blue a cog light came on which i have been told is the pcm light,the car died and wouldnt start for around 5 mins,eventually got it running and got it home,a friend plugged it in and a p0698 code came up,he said it was throttle pedal,so replaced that also put a new fuel filter after a day or 2 same thing happend,it wouldnt start so i put a forscan on it turned the pcm light off and it started,after 2 hours cut out again so i unplugged egr and it run fine for 2 days then the light came on again even with the egr unplugged,it has no problem starting but once that pcm light comes on the car will not start until i plug forscan into it and clear the p0698 code,is there anyone out there who can help it says sensor reference voltage c circuit low additional fault symptom circuit voltage below threshold......thanks in advance,jon

[@alanghai3725]

Hi what is a c1226 code on Astra Gtc j 14 plate pls

[@Ecutestinglimited]

Hi. A C1226 fault code usually indicates a problem with the wheel speed sensor (normally the front right one but confirm this on the diagnostic software when scanning for the fault codes). The problem could be with your ABS pump and module, wiring to the wheel speed sensor or a faulty wheel speed sensor. Check out this video we have on how to diagnose wheel speed sensor faults: kzbin.info/www/bejne/imiXc5KXerGhi5I

[@daniellarsen4806]

I have a P0601 does the instructions in this video imply to that code as well? Am working on a diesel, like you mentioned in the vid. Also thank you for the video, love the animations and explanations, so easy to follow along

[@Ecutestinglimited]

Hi. We have normally seen that the P0601 fault code indicates something is wrong with the internals of the ECU itself, however you may still want to follow the steps detailed in the video to rule out any external faults before condemning the ECU. Cheers.

[@daniellarsen4806]

All right thank you for the answer, much appreciated 👍🏼 But also wondered if the p0601 wold have anything to do with the TCM, because in my car the TCM and ECU are in separate boxes/housings. Does that code indicate anything with the TCu or ECU only?

[@Ecutestinglimited]

@@daniellarsen4806 Hi. The P0601 code is usually stored in the control module which is experiencing the fault, so when you scanned the vehicle was the fault code stored in the TCM or ECU? Cheers

[@daniellarsen4806]

@@Ecutestinglimited ahh okay, found out the EEPROM or memory chip is located in ECU box. So probably the fault is somewhere in the ECU if everything else outside the ECU checks out

[@daniellarsen4806]

@@Ecutestinglimited thank you so much more clear now!

[@hudumasaud8295]

You did not mention check for Alternators.

[@lijalaji148]

...5:28 ...should be kohms... Otherwise excellent video 👏 😉

[@harrysingh3276]

P06A8 FORD Code - Sensor Reference Voltage 'C' Circuit Range/Performance what does this mean boss

[@Ecutestinglimited]

Hi, we normally encounter the P06A8 fault code alongside the P0606 code which could indicate that the ECU is faulty. If you could email our technical support team with your part number and details of the fault at [e-mail], then they will help you out. Cheers

[@moustaphacheva3757]

I have p0607 😊

[@jack_blade7214]

On a d Fiesta 1.4tdci i have too many codes P0606, P0366,P0191,P0626 and P0563. It is possible ECU damage, harness ....anybody with something ells idea?

[@Ecutestinglimited]

Hi. With all those codes we would definitely recommend thoroughly checking the wiring to the ECU, as well as inspecting the connector for damage or corrosion. If you would like to send your ECU into us for testing then please fill in our online test form for further information: myaccount.ecutesting.com/

[@BLR1GBattlemaster]

You missed an important one: spark plugs. I found this out on another forum. It turns out the OEM spark plugs I thought were genuine turned out to be fakes. In just several months, my car lost power, went into limp mode, and threw this CEL code. It took me awhile to figure it out, but I bought genuine OEM plugs in the store, and my care is back to being good. I've also read that Honda's do not like non OEM plugs. Stick with OEM, and make sure they're genuine.

[@salimmhamed4287]

Hi p060c tiguan 2020

[@arminhakimi637]

👍👍👍👍👍👍👍👍❤

[@fickrett3448]

What cencor are you talking about? There are many cencors in a car

[@Ecutestinglimited]

Hi. Unfortunately there are quite a few sensors in a car can cause a P0606 fault code to occur. However, if a sensor is at fault then you should have a secondary fault code, along with the P0606 code, which should detail which sensor is potentially at fault. If you haven't got a secondary fault code then you can ignore this step. Cheers.

[@fickrett3448]

@@EcutestinglimitedHi thanks for answering! i don't remember the exact code but it was described as; engine running rich We have had some trouble with the O2 sensors but we fixed them so they should not be a problem...

[@Ecutestinglimited]

@@fickrett3448 No problem! We hope replacing the O2 sensors fixed the problem. If you are still getting a P0606 fault code with the engine running rich then it could be worth checking the wiring to the O2 sensor or the MAF sensor.

[@fickrett3448]

@@Ecutestinglimited Thanks alot! I will check this out!🎉

[@19FH86]

@@Ecutestinglimited Hi! In my 2011 Mercedes-Benz C180 CGI (w204), i have a seccondary fault code P0705 besides P0606. Tomorrow I'll chance my battery because I change it only in Dec/2016!

[@bigbadlouroma]

My car is running fine but it's throwing it while driving

[@Bevans_slow_stang]

I have the same issue with my vehicle. 2010 dodge Avenger 2.4L. This car is like a project car I swear. But my code only appears once I drive for a good 20 mins.

[@ramazanbuyukarslan]

Hello Sir Code No. P1A00: ?

[@Ecutestinglimited]

Hi. A P1A00 usually indicates a problem with the Accelerator Pedal Position Sensor. Test the sensor is receiving the correct power supply and it has a good ground. You can also test it is outputting a good signal by using live data from a scan tool whilst operating the pedal and checking if the output data matches the action. Hope this helps!

[@ramazanbuyukarslan]

@@Ecutestinglimited Thank you very much for your interest and help.

[@ramazanbuyukarslan]

@@Ecutestinglimited

[@ramazanbuyukarslan]

only this is a motorcycle scooter 125cc Hero dash