What is the rear O2 sensor code for?

What is the rear O2 sensor code for?

the rear o2 sensor makes sure that your cat is still doing it job of burning any on burn gas. the dealer is right it can damage your cat but most likly not, but if it the check engine light flashes you need to turn off the car and bring it to the shop becuse that means that it could damage tha cat. DTC code P0141 “O2 heater circuit. Bank 1.

What causes the p0054 OBD-II trouble code?

This code means the Heated Oxygen Sensor (HO2S) resistance is out of range with engine bank 1 (side of engine with cylinder #1) on the sensor downstream or behind the catalytic converter. What causes the P0054 code? What are some of the symptoms of P0054 code?

Can a bad O2 sensor cause a check engine light?

In most cases, a bad (O2) sensor will trigger a check engine light. P0138 and P0135 are some of the codes you may expect to see on a OBD II reader. Other than that, it’s difficult to spot a failing (O2) sensor.

Is the O2 sensor on my Subaru not working?

OK, the heating circuit has failed on my downstream O2 sensor (CEL code P0141). As I understand it, this sensor does not affect fuel trim but only monitors exhaust. My Subaru still runs fine with a very slight decrease in MPG. Dealer wants over $300 to replace and says if the sensor is not replaced, damage will occur to catalytic converters.

What does the 02 sensor code on a GM Truck mean?

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. It’s a four wire sensor being supplied a 0.5 volt reference voltage (usually on the signal wire) and a ground, as well as a power and ground circuit for the o2 sensor heater element.

When to eliminate the rear O2 sensor in a car?

When people modify their cars to gain horsepower, the O2 sensor usually tells the computer that the vehicle is outside regulation and the check engine light comes on. Some people eliminate the rear O2 sensor located directly in front of the catalytic converter to overcome the check engine light.

What is the code for the O2 sensor?

If you find there is no battery voltage feeding the o2 sensor use the associated code to diagnose that. If you find the heater element bad, replace the sensor. If the heater element checks out then, using a jumper wire, supply a chassis ground to the o2 sensor connector (PCM side) ground circuit.

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).