Vauxhall Corsa running issue fixed Fault code P0171

Vauxhall Corsa Fault code P0171 - Fuel trim system lean
Engine light kept coming on without running issues.
Used our smoke tester to find the fault.
Engine management light on - MIL
Malfunction indicator lamp

[@matthewroberts1340]

Very helpful video my man, nice one👍

[@savage18]

Great video. Thank you for the help!

[@niloyu105]

New subscriber watching from Basingstoke

[@melsmotors]

Thanks Nilo. 👍🙂

[@dh1474]

Brilliant, many thanks!

[@p.p2295]

My Vauxhall gtc is running great at moment but rac man came read code. It said fuel Trim lean. Engine light came back on again after 2 miles. He did say to me that I really can't sort it out untill I see problems with car. At my local garage. But hope my fix is easy as yours. On the video

[@rudo747]

Looks like this could be the issue on my Corsa ,thank you 👍

[@melsmotors]

☺👍

[@rudo747]

@@melsmotors fixed😆👍

[@simonanning5484]

Great video, have the same issue, saved me a lot of time 👍🏼

[@melsmotors]

☺👍

[@xbuelent]

Dankeschön.Schöne Video.👍👍👍

[@melsmotors]

👍👍👍👍👍

[@williamstewart1266]

topman great video

[@sumbukids]

Looks like a common problem with corsas I can relate to a lot of the comments. Garages can’t find the issues but still charge for work that might fix it and the RAC not helping. Problem keeps happening and also told to use the most expensive petrol

[@kevinbush7907]

This code can also be intermittent, so a short test drive won't show if it's resolved immediately. Had the same issues on an astra J, A14XER engine. You need to consider the fuel trims after replacing to see if they have settled down to specification, both long and short term fuel trims should be around zero, the long trim takes longer to settle. The code only sets if the short term fuel trim goes above 10% at least 3 times I believe.

[@melsmotors]

Thanks Kevin for your feedback, it was the short term fuel trim that indicated there was an air leak prior to investigating the fault to repair. Fuel trim is a whole new topic, most people who watch these videos use a code scanner with no actual live data or the understanding of fuel trim. Thanks again for your feedback it may help others 🙂👍

[@kevinbush7907]

@@melsmotors thanks for your response. My comment was more to help others maybe not so familiar with fuel trims. Purge valves seem to be a regular issue, and your video shows the sure fire way, using smoke to diagnose a vacuum leak or problem with the PCV, so very well explained.

[@mateusz1227]

I think I might have the same issue, Z14XEP Astra H 1.4, P170, on idle MAF shows only 4.5 kg/h air intake (read somewhere way to low value) so it takes it from somewhere else, from fuel tank maybe. I will try to turn the engine on and open the file cap, if there is suction them I guess I have the culprit. One I must admit, crappy cars these are. All the time something's go wrong with them

[@omaromartt]

Very gut

[@bujiasable]

hola tu equipo de diagnosis es autel ?

[@bocacioca1379]

Hello, nice video when that valve is working you should feel it slamming? Is normal or not to slamm,when the engine is on idling?

[@arielatom03]

In some cars it is. Like in fords its normal

[@tridens6708]

Thank you I have the same fault to remove the valve do you pull out the green clip and press in the white clip to remove?

[@melsmotors]

Sadly I can't remember, sorry it was a year ago I did this job.

[@afzilla7369]

Hi, informative video. Im having the issue onmy corsa. Do you have a part number if you got it from euro car parts by any chance?

[@melsmotors]

I can't remember where the part came from, if it's a Bosch part, then Euro car parts can help you with the Bosch part number! Test it before you replace it! Good luck 🙂👍

[@afzilla7369]

@@melsmotors thanks

[@albertomatambo9441]

Got the same problem with my Vauxhall the garage said that I MUST use ONLY V Power from shell. Too expensive 😢

[@melsmotors]

Hi Alberto, what's the oil got to do with it? This issue on this particular car was just a parts failure! Not oil related at all! I don't understand your mechanics logic. Most Vauxhall's use DEXOS 2 oil, check your owners handbook and use that oil. Take care out there 👍😊

[@kulatensaid7535]

very nice video. i have same problem my mechanic told me i have to replace my zafira tourer 2017 1.4 Turbo Inlet Manifold Evaporation Purge Control Valve. how can i check myself if is working or need replacing? it say fuel system trim lean. any help thanks

[@melsmotors]

That is a possibility, the manifolds do fail on those. Do the blow test through the valve first, if you can blow through it, then it's the cause. It could be the intake manifold or the diaphragm in the cam cover!

[@markbertenshaw3346]

Think this could be the issue with my wife's corsa engine light going out after 5 seconds. ones car starts ,but it has an oily fuel smell inside car

[@melsmotors]

Hi Mark, don't just change the valve without testing it first, blow through it! If you can smell oil it wouldn't be this valve! These also suffer with the diaphragm failing in the cam cover, that may give you the scent of oil 🛢️ good luck 🤞

[@XPUnitX]

Hi mark what was the issue then? My car smells of fuel inside as well

[@markbertenshaw3346]

@XPUnitX hi turned out to be the fuel purge valve it was stuck open, changed that seemed to sort the issue ,happy days

[@XPUnitX]

@@markbertenshaw3346I’ve just checked mine and can’t blow air through it so it must be fine so still no ideas what it could be

[@bartbury4948]

🔔&👍

[@ferdyguterres5734]

Mine engine lights on dash board for few months i Took to garage they said fuel lean but after I took to other garage they couldn’t fixed it and they said fine it’s normal because exhaust external

[@melsmotors]

😂 Some garages make me laugh! You either have an intake leak after the air flow meter (if you have an airflow meter) or just a general intake leak, either split hose, intake manifold gasket, split breather diaphragm, air leak from injector seals, cracked intake manifold, faulty solenoids, or it could be an exhaust leak before the O2 sensors, gasket, cracked manifold or pipe, broken flexi pipe, etc. Both these types of leaks will give you a lean code! You will need to investigate the problem, you will need a smoke machine for small and hidden leaks. The computer is saying there's a problem, you just need to find a good mechanic to find it!!

[@dannyboy6114]

Hi my corsa has a problem when I'm driving. When my car get to 20k rpm the revs shoot up then come back down. Has anyone had this problem before. Has it got anything to do with the clutch. Any help would be appreciated. It's a corsa d 1.3cdti 2012

[@melsmotors]

I would strongly suggest getting a mechanic to look at it, especially if your diesel revs to 20k 🫣

[@bujiasable]

hola cuando el motor esta parado la valvula no tiene que dejar pasr aire ?

[@melsmotors]

sí cuando el motor está parado no debe pasar aire

[@bujiasable]

@@melsmotors vale pues me funciona bien con en el motor en marcha e desconectado el tubo que biene del deposito y la valvula funciona dando inpulsos muy seguidos aspira y deja de aspirar

[@colski222]

Would it be the same for a Vauxhall Astra 2006 1.6 petrol Sxi cheers

[@melsmotors]

Hi Colin, if you have the same fault code then it could be the same fault. I demonstrate in the video how easy it was to test, just blow through the valve, if it blows straight through it's faulty. Thanks for watching 😁

[@colski222]

@@melsmotors Would my pcv be in the same place. Or is it integrated into the rocker cover I was meant to say cheers

[@django0393]

Hi, I’ve got the same fault on my car but no EML light. Just keep getting a service vehicle soon message every now and then. I’m trying to remove the valve from my car to test it but the thing won’t come off, any advice?

[@django0393]

It’s the green clip to the pipe I couldn’t get off. Given up now. I tried blowing into the pipe that was connected through the rubber seal and couldn’t get any air through, don’t know if that’s a sign that the valve isn’t faulty or if I needed to get it fully off to get a proper verdict

[@melsmotors]

It's really hard to get off from memory! Keep trying, if it fails, garage time I'm afraid 😔

[@django0393]

@@melsmotors yeah I’m going to take it in to the garage today anyways. Got a couple other codes that’s coming up as well as this ; Fan circuit faulty sensor & AC Compressor malfunction 🤣 going to be a long day

[@shylomcnally8637]

Hi what was the code for the purge valve please ?

[@melsmotors]

Sadly I don't know, it's rare that they just pack up, usually the diaphragm splits. Scan, clear the codes, disconnect the sensor, scan again and see what comes up! This way you'll know the code 👍

[@danielmetcalfe5985]

Would that be the same for Vauxhall Zafira?

[@MrRohanThomas]

Yes same

[@HaqVbatil]

Hi,what is this valve called please?

[@kevinbush7907]

Purge control valve, sometimes referred to as the PCV or evap control valve

[@thebeardedgeek8018]

Hi mate could u do video replacing the purge valve

[@melsmotors]

Hi, the purge valve is at the back of the engine, it's in the video.

[@jordanprice7542]

Think he's on about a actual video of you removing the purge valve, screws and hoses! I'm about to try do this myself but it's a bloody hard bit to get out not everyone has the same clips on the left-sided I've noticed plus lots of people tend to break the rubber hose on the right trying to remove it.

[@melsmotors]

@@jordanprice7542 sadly I don't have the car to re-record the video of the removal. If I get another one in I'll update the video.

[@jordanprice7542]

@@melsmotors I got mine out was a pain in the ass but I did it. Ended up using a flat head to get under the rubber closest to the valve not the engine and wiggled it out, but think mine is fine no replacement needed no air can blow through. I've changed coil pack spark plugs cleaned maf cleaned trottle body checked the pcv checked for vacuum leaks nothing still low idle revs. I blame the bloody e10. Haven't used it for months after the warning light starting to come on few miles after filling up with it. That's what caused a missfire and screwed my coil so fixed and removed the codes never had the light since just low idle slight vibration and no error codes and a ton of frustration.

[@jordanprice7542]

@@melsmotors other than the low idle my car actually runs better than the day I got it so there is some plus side to this torment

[@kbmmaurbancombat]

I think I've got same issue on my Zafira 2009 Petrol. Had the B1 lambda sensor change but car still bouncing revs when driving and always feels like it's going to stall. Where did you get the Bosch sensor from please?

[@melsmotors]

Sadly I can't remember, we repair around 3500 vehicles a year, thanks for watching 👍🙂

[@kbmmaurbancombat]

@@melsmotors no worries cheers mate

[@iuliantonu8656]

Hy i have a corsa 1.2 2011 petrol and it shoes 2 codes p0161 and p0171 and i took off the pcv valve and you cant blow air tru it and i but my finger on the hose of engine and is runing the same if i take of the finger turns off after a while ,and all of this i think comes up after i cheange oil in gearbox and camshaft seal i had a little leak of oil in fron of engine but i put all back corectly i cant see where it cood be the problem , and when i drive it and gets warmed up it is hard to change and the gears i had to turn off the engine to shift , i let the car to a garage and told me is the clutch and that is it but the engine still has to work normaly please help me

[@iuliantonu8656]

And also with pcv valve conected it not has to open and close its stay shut all the time

[@melsmotors]

Hi buddy, if I could fix cars via an email or over the telephone I would be a millionaire! 😂🤣 I need you car here to run tests!

[@iuliantonu8656]

I found today that even the exhaust the flexy one it has some holes because is making noise and gets air out , is posibel to be one from this the exhaust?

[@iuliantonu8656]

It can be fix and like that is more importent the ideeas and what to do instead the hard work

[@melsmotors]

@@iuliantonu8656 sadly I can't tell you what to look at or fix without seeing the car, then scanning it and then reading the live data! It needs to go to a proper mechanic to diagnose the issue!

[@martinjones849]

Common fault that Mel!

[@999momak]

I got astra H 1.4 16v. My car has very little engine braking and sounds very quiet. I can hear whinning noise under the car when its in gear driving. When I press the clutch whinning goes away. Also when I pour gasoline nozzle keeps shutting off. Car sounds so quiet like engine is not getting enough air and when accelarating sometimes it feels forced. Also sometimes i get blue smoke on startup only. My question is how do I fix car to get more engine braking and more louder cause I know its not supoose to be like that. I know it can be multiple problems but what is the biggest one that makes my car have almost none engine braking

[@melsmotors]

Thanks for your message. Sounds like you need to see a mechanic pretty soon. If I could fix a car via a message or phone I would be a millionaire ☺️ I can say almost for sure that whining noise is you gearbox!

[@999momak]

@@melsmotors could bad clutch make gearox whinne. Cause when i press the clutch or release it I can hear some clicking sound. Also when car is parked on flat in 1st gear it moves a bit too much