Why do I get po113 on my Pontiac Sunfire?
1998 Pontiac Sunfire 2.2L Replace intake air temp sensor but still get code PO113. What’s going on? Hi There, Generally, this code is related to the sensor itself failing or in many cases failed connections or an internal wiring short, which results in this code being triggered even when the sensor is functioning properly.
What causes p0157 to set on rear O2 sensor?
If the PCM determines that the post-cat o2 sensor signal voltage is below a certain threshold for too long, P0157 will set. Usually rear o2 sensor problems won’t cause drivability issues since they are an input that measures catalyst efficiency (unlike front o2 sensors).
What does a p0157 mean on a catalyst?
If you have a P0157, that doesn’t mean your catalyst is bad (in fact, it usually never does). This code basically means that the Bank 2, Sensor 2 (or second o2 sensor back on bank 2) signal voltage is below what is considered normal for that sensor.
Why does my O2 sensor keep sticking low?
If the voltage isn’t stuck low and the o2 sensor seems to be operating fine, it’s likely sticking low intermittently. This often turns out to be the sensor. In either case, replacing the sensor can be an effective way to diagnose the problem.
How does code p0137 work in a PCM?
To understand code P0137 better, you have to first understand how O2 sensors work together. Upstream O2 sensors (sensor 1) produce varying voltages that enable the PCM to adjust the air-fuel mixture from rich to lean, and vice versa.
What does p0137 mean on a check engine light?
P0137 is a diagnostic trouble code (DTC) for “O2 Sensor Circuit Low Voltage (Bank 1, Sensor 2)”. This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic.
When does p0137 trigger in a catalytic converter?
In contrast, downstream sensors (sensor 2) generate a fairly steady voltage when the catalytic converter is working properly. Code P0137 triggers when the PCM detects that the signal from sensor 2 on Bank 1 was below a specific value for a certain amount of time.
What is the p0137 code for oxugen sensor 2?
Code P0137 triggers when the PCM detects that the signal from oxugen sensor 2 on Bank 1 is below a specific value for a certain amount of time. The Bank 1 portion of the code refers to the side where the #1 cylinder is located. There are two O2 sensors in your vehicle.