KalinKB

Okay, I will test it again, cold start and while it's running idling, I'll disconnect the MAF to be sure. Is it mandatory for maf to be original, or can it be aftermarket from Hella?

Okay, I will test it again, cold start while it's running idling, I'll disconnect the MAF to be sure. Is it mandatory for maf to be original, or can it be aftermarket from Hella?

Hello, colleagues! The car is an Octavia 1 Combi, 1.6 petrol with LPG, engine code BFQ, athmospheric motor without a turbo. On a cold start, it runs quite rough for about 2 minutes and sometimes even tries to stall. There's a constant "lean mixture" error with code P0171 when running on petrol, and at low RPMs/idling, the check engine light might come on, but even if it doesn’t, the error is logged. VCDS diagnostics show that while driving at full throttle (100% throttle opening), 60 grams of air per second pass through the MAF sensor. Should it be more? When starting at idle at operating temperature, the reading is 1.9-2.20 grams/sec. Should that be higher? I tried running the engine without the air filter, and at idle, the reading is the same as with the filter in place. If I disconnect the MAF sensor before a cold start, the car runs fine. Please advise if I should replace the MAF sensor right away, or if there’s a chance something else might be causing the issue. I attach log file. Thank you! xls LOG-01-002-003-062.xlsx