What is code P0171 Volkswagen?
P0171 VW/Audi Fault Code: System Too Lean (Bank 1) If your CEL (Check Engine Light) is illuminating and you pull a P0171 fault code, it will read out “System Too Lean” or “Fuel Trim System Lean Bank 1”.
Can P0171 cause misfire?
What are the symptoms for a P0171 code? Generally, a lean code will cause the engine to run poorly, which the driver will notice as a high idle, a misfire, a lack of power, or even engine stalling, and this may happen before the check engine light has turned on.
How do I fix P0171 too lean?
What repairs can fix the P0171 code?
- Replacing the fuel pump.
- Replacing the fuel filter.
- Replacing the fuel pressure regulator.
- Replacing the powertrain control module.
- Replacing one or more injectors.
- Replacing one or more oxygen sensors.
- Replacing the mass air flow sensor.
- Repairing a vacuum leak.
What are the p0171 and p0174 codes on a 2002 VW Passat?
If the P0171 is combined with the P0174 code, it’s very likely that the problem is caused by an intake leak. If there are no intake leaks, the next step is to replace the air filter and clean the air flow meter. If the problem persistss the front oxygen (O2) sensor may need to be replaced. 2002 Volkswagen Passat
Can a bad ignition coil cause a p0171 misfire?
It is common to have a P0171 code followed by engine misfire codes (P0300, P0301, P0302, P0303, P0304), but it is important to replace or diagnose the three others above before assuming it is a bad coil causing this code. Ignition coils use the battery’s voltage and transform it into the voltage needed for the spark plugs to create combustion.
How much does it cost to fix the p0171 VW O2 sensor?
If the problem persistss the front oxygen (O2) sensor may need to be replaced. The cost to diagnose the P0171 VOLKSWAGEN code is 1.0 hour of labor. The auto repair’s diagnosis time and labor rates vary by location, vehicle’s make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.
What causes a p0171 O2 sensor to go bad?
If the P0171 is combined with the P0174 code, it’s very likely that the problem is caused by an intake leak. If there are no intake leaks, the next step is to replace the air filter and clean the air flow meter. If the problem persistss the front oxygen (O2) sensor may need to be replaced.