P0171, P0174, P0441 Fuel Trim Evap Emissions Fault Codes

**sebas_thefish** · 02-01-2022, 03:59 PM

My Mk5 R32 has started throwing the above error codes and yesterday illuminated the check engine light. Anybody had experience with these codes or know common things I should be checking? The car still drives fine but does seem to stumble a bit on startups so it doesn't seem too serious.

01 Engine

System description: MOTRONIC ME7.1.1G
Software number: 022906032JR
Software version: 6773
Hardware number: 022906032GP
Serial number: VWZ7Z0G8004594
Coding: 0000178

Trouble codes:
P0171 - Fuel Trim,Bank1 System too Lean Upper limit exceeded
Intermittent
Priority: 0
Frequency counter: 8
Driving cycle: 255
Mileage: 139283 km
P0174 - Fuel Trim,Bank2 System too Lean Upper limit exceeded
Intermittent
Priority: 0
Frequency counter: 2
Driving cycle: 255
Mileage: 139392 km
P0441 - EVAP Emission Contr.Sys.Incorrect Purge Flow Lower limit not reached
Intermittent
Priority: 0
Frequency counter: 1
Driving cycle: 255
Mileage: 139399 km

**vinnY** · 19-01-2022, 04:15 PM

kept getting the p0441 on my mk5 gti, seemed to have fixed it by replacing my bosch n80 valve and evap canister thing

after you clear the codes, does it take long for them to come back? chipped at all?

**sebas_thefish** · 19-01-2022, 05:10 PM

I got the P0441 code sorted, turned out to be a bad hose on the charcoal canister. Replaced that and that code hasn't come back, neither has the check engine light so it seems like that's what was triggering it. The other 2 are still occuring, if I clear them they're back within a few hours. It does have a stage 1 ECU remap on it but it's had it for a while. Will see what VW reckons when it goes in for a service in a few weeks.

**MrTony** · 17-02-2022, 12:56 PM

Howdy - just curious if you had these resolved?

I recently bought a MkV R32 too, and think it was throwing similar codes.

**sebas_thefish** · 17-02-2022, 01:04 PM

Originally Posted by MrTony

Howdy - just curious if you had these resolved?

I recently bought a MkV R32 too, and think it was throwing similar codes.

Car still hasn't gone in for a service. Should be in a few weeks and I'll report back if they say anything. Check engine light and related fault code is sorted, was just a bad charcoal canister hose not sealing properly. I replaced it myself and fixed that one.

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**MrTony** · 17-02-2022, 01:58 PM

Noice - good luck!

**sebas_thefish** · 28-02-2022, 08:25 PM

Well...all 3 codes came back today and the CEL is back on. Still waiting to get the car in for a service. I really hope this turns out to be something minor, I'm so over losing my car to the dealership for days just to have no solution.

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**MrTony** · 01-03-2022, 07:24 AM

Crap.

I hear you! My R32 has been in the workshop almost as long as I’ve owned it.

Good luck with the codes. Have you looked at the Ross Tech error code forum?