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Volkswagen Jetta 2002 code P0171

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System too lean. P0 171 Bank 1. Volkswagen Jetta 2002. Just got car from transmission fixed.

Vehicle: Volkswagen 2002

1 Answer

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the might have an intake leak somewhere, maybe a loose or disconnected hose. 

Possible causes
- Intake air leaks
- Faulty front heated oxygen sensor
- Ignition misfiring
- Faulty fuel injectors
- Exhaust gas leaks
- Incorrect fuel pressure
- Lack of fuel
- Faulty Mass Air Flow (MAF) sensor
- Incorrect Positive Crankcase Ventilation (PCV) hose connection

https://www.autocodes.com/p0171.html

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