Can a bad catalytic converter cause a p0171 code?
No, a bad catalytic converter cannot damage an engine. A modern vehicle has two sensors that monitor the exhaust gases – before the converter and one after.
What does p0171 mean on a check engine light?
When fuel injection adjustments become too large, the fault code P0171 will be sent to the ECM, which will trigger the check engine light to illuminate. This code could either mean that the oxygen sensor is detecting too much oxygen or too little fuel in the mixture. This lack of fuel is known as a lean mixture.
What does p0171 mean in a lean mixture?
This lean mixture can either be short term or long term. If the lean mixture is a short term one, it means that the fuel mixture is usually very lean. Otherwise, for long-term lean mixture, the code p0171 is registered according to an indication of the lean mixture through time.
When does AutoZone send an error code p0171?
The optimal ratio is 14.7:1 (air:fuel). When your powertrain/engine control module receives a reading that indicates there’s too much oxygen and the ratio is incorrect, it sends an error code P0171 or P0174. Depending on the problem, it may send both codes if the issue is causing a lean condition on both engine banks.
Why is my MAF sensor sending out a p0171 code?
How to Fix P0171 and P0174 While inspecting the intake boot thoroughly, another option is to stop at the MAF sensor itself. MAF sensors can get dirty or oiled and send out a false signal, but usually this is also indicated by a MAF trouble code as well.
What does p0171 mean in lean Bank 1?
P0171 (lean fuel injection system, Bank 1) simply means the air-fuel ratio is too lean that the ECM can no longer compensate due to very large error. It can be caused by air intake/exhaust leak, defective front O2 sensor, bad fuel injectors, low fuel pressure or even a dirty/faulty MAF sensor.
When fuel injection adjustments become too large, the fault code P0171 will be sent to the ECM, which will trigger the check engine light to illuminate. This code could either mean that the oxygen sensor is detecting too much oxygen or too little fuel in the mixture. This lack of fuel is known as a lean mixture.
The optimal ratio is 14.7:1 (air:fuel). When your powertrain/engine control module receives a reading that indicates there’s too much oxygen and the ratio is incorrect, it sends an error code P0171 or P0174. Depending on the problem, it may send both codes if the issue is causing a lean condition on both engine banks.
How to Fix P0171 and P0174 While inspecting the intake boot thoroughly, another option is to stop at the MAF sensor itself. MAF sensors can get dirty or oiled and send out a false signal, but usually this is also indicated by a MAF trouble code as well.