P0171 Engine Error Code

When you check engine light came on code P0171 the reason should be Fuel injection system does not operate properly.. However your vehicle's manufacturer may have a different definition for the P0171 OBD-II Diagnostic Powertrain (P) Trouble Code. So you should chech it on your car models.

P0171 Code Symptoms

P0171 OBD2 may also be triggered by faults earlier down the line. For example, a dirty MAF sensor might be causing the car to overcompensate in its fuel-trim adjustments. As a result, oxygen sensors are likely to report fuel mixture problems.

Power Steering Pressure (PSP) Switch Signal Malfunction The PCM counts the number of times vehicle speed transitions from 0 to a calibratable speed. After a calibratable number of speed transitions the PCM expects that the PSP input should have changed. This DTC is set if the transition is not detected. Vehicle towed with engine running Power steering hydraulic concern was repaired but DTC was not erased PSP switch/shorting bar damaged SIG RTN circuit open PSP circuit open or shorted to SIGRTN PCM damaged Check, if possible, if vehicle was towed or power steering service was performed. Observe PSP V PID while checking wires for intermittents.

P0171 OBD-II Diagnostic Powertrain (P) Trouble Code Description P0171 OBD-II Trouble Code With the Air/Fuel Mixture Ratio Self-Learning Control, the actual mixture ratio can be brought closely to the theoretical mixture ratio based on the mixture ratio feedback signal from the heated oxyge P0171 Code Review : The reason of P0171 OBD-II Engine Error Code is P0171 System Too Lean Bank 1.

P0171 Code Dictionary Meaning:

- 0 - SAE - Generic 1 - Fuel And Air Metering 7 - Exhaust Gas Recirculation System Valve 1 1 - PCM Stack Overrun

How long can you drive with a P0171 code ?

If your vehicle is displaying a P0171 OBD2 error code but is still running and driving normally, it means that the issue might not be immediately critical or causing immediate harm to the vehicle. However, it's important to address the issue as soon as possible for several reasons:

• Potential for Worsening
• Decreased Fuel Efficiency
• Emissions Testing Compliance
• Risk of Further Damage
• Safety Concerns
• Legal Considerations