P0171 Trouble Code

View P0171 obd/2 error code description and symptoms. P0171 engine photo

EGR Flow Insufficient Detected The EGR system is monitored during steady state driving conditions while the EGR is commanded on.
The test fails when the signal from the DPF EGR sensor indicates that EGR flow is less than the desired minimum. Vacuum supply EGR valve stuck closed EGR valve leaks vacuum EGR flow path restricted EGRVR circuit shorted to PWR VREF open to D.P.F. EGR sensor D.P.F. EGR sensor downstream hose off or plugged EGRVR circuit open to PCM VPWR open to EGRVR solenoid D.P.F. EGR sensor hoses both off D.P.F. EGR sensor hoses reversed Damaged EGR orifice tube Damaged EGRVR solenoid Damaged PCM Perform KOER self-test and look for DTC P0171 as an indication of a hard fault.

As the engine heats up and combustion becomes easier and more complete, the PCM will command the idling control valve to increase the amount of air entering the engine to suit the changing conditions. However, when the load on the engine changes, say, when some electrical consumers or other systems are either turned on or off, the PCM adapts the signal voltage to the idle control valve to ensure that the idling speed remains stable, and at the RPM specified by the manufacturer.

P0171 Error Code Repair Process :

If your p0171 system too lean bank 1 check engine light is illuminated, it's best to take it in for diagnostic testing, which can feel like a hassle. Because while the lights vary in appearance from vehicle to vehicle, all have the same basic meaning: There's a problem with the car's emissions system. The on-board diagnostics system P0171 and engine control unit are in charge of monitoring a bunch of different p0171 system too lean bank 1, and if they get a reading that's a little out of whack, up pops the check engine light.

P0171 is a kind of Powertrain Trouble Code

Powertrain of a modern automobile, comprising engine (with exhaust system), transmission, drive shaft, suspension and the wheels. In a motor vehicle, the term powertrain or powerplant describes the main components that generate power and deliver it to the road surface, water, or air.

Common Causes of P0171

A common cause of code P0171 is the failure of P0171 System Too Lean Bank 1, but there are several other possible causes as well, such as ;

Air fuel ratio (A/F) Sensor 1 Bank 1 circuit poor electrical connection
Faulty select solenoid
Failures of clutch motion/travel sensors.
Fuel injector leaks

P0171 code for all cars

You can view according P0171 DTC for your car model. We selected several models to see obd2 solutions click and view it.

+P0171 Dodge Challenger

+P0171 Maserati 8

+P0171 Alfa Romeo Montreal

+P0171 Ford 2000

+P0171 Saturn Curve

Engine OBD 2 Codes website is a freeware resource center for engine trouble codes.

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