How do I fix my GM code P0171?
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 causes engine code P0171?
This can be caused by something like a disconnected hose or vacuum leak, which means there’s more air than usual, or because your fuel system is weak. P0171 is a common trouble code in many vehicles. If there is too much air, the ECM or PCM overcompensates with larger fuel injections, which triggers the P0171 code.
Can a misfire cause a P0171 code?
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.
Can I drive with P0171?
It is okay to drive a vehicle with P0171 for a short period of time, but driving with this code for an extended period of time can overheat the engine and cause internal engine damage.
How do you fix lean air/fuel mixture?
Vacuum leak: Vacuum leaks can cause a lean fuel mixture. Inspecting and replacing damaged vacuum lines with good hoses and clamps can solve a lean problem. Clogged fuel filter: clogged fuel filters will limit the amount of fuel requires by the engine.
Can you drive with code P0171?
How much does it cost to fix a P0171 code?
Perhaps your P0171 OBD-II Trouble Code: System Too Lean Bank 1 trouble code is appearing because it is due to you needing to replace your fuel injector/injectors. Generally, a fuel injector replacement cost will between $800 and $1,450 for a full replacement.
Which O2 sensor is P0171?
The P0171 generic OBD2 DTC is usually triggered by the front O2 sensor, or oxygen sensor #1 (similar to P0135). Once the ECU detects the sensor is detecting too much oxygen in the exhaust, it will try to compensate by maintaining the ideal burn ratio of 14.7 Air to 1 Fuel.
How much is it to fix a P0171 code?
Can a bad O2 sensor cause P0171?
You probably know that the answer the questions is — no! A P0171 or P0174 lean code with an O2 sensor reading lean all the time mean — well, several things. The real problem may not be a bad O2 sensor, but possibly be an engine vacuum leak, low fuel pressure or dirty fuel injectors that are causing the engine run lean.
What does the p0171 code on a GMC Envoy mean?
One of the most common trouble codes with the GMC Envoy is the P0171 code. This code number references a number that is given to you when you plug your car into a OBDII scanner. Envoy P0171 Code Defined. P0171 is an OBDII trouble code. The code technically stands for:
What is the trouble code on my GMC Envoy?
One of the most common trouble codes with the GMC Envoy is the P0171 code. This code number references a number that is given to you when you plug your car into a OBDII scanner. Envoy P0171 Code Defined. P0171 is an OBDII trouble code.
What causes the p0171 code to go bad?
Mass Air Flow Sensor – The mass air flow sensor calculates the volume of air entering the engine. If it has gone bad, the air fuel mixture will be off and the P0171 code will show. Bad Fuel Injectors – If you have one or more fuel injectors that have gone bad that can certainly cause the air/fuel mixture to go bad.
What causes a GMC Envoy to run rich?
When the oxygen sensor is bad, it can cause a false reading and trigger the code. The computer will still adjust the air/fuel mixture to compensate. This will cause the Envoy to run rich. Mass Air Flow Sensor – The mass air flow sensor calculates the volume of air entering the engine.