Check engine light when coming hot while in running
SOURCE: 3 codes present on my 2002 Envoy. p0172, p0420, and p0340,
Track the p0340 first camshaft timing is very important and could possibly cayse your other codes,Call your local GMC dealer I think I remember a bulletin about this code.
SOURCE: CHECK ENGINE LIGHT IS ON, GOT CODES P0157 2 TIMES,
the bank 2 sensor2 is used to check that your catylitic converter is working on that side of the exhaust. without seeing the car and doing sensor tests, it would be a gamble to say replace the sensor. so you can replace it and see what happens or take it to your favorite shop for further diagnosis
SOURCE: i have an engine code PO332 knock sensor 2 circuit
The most likely cause of your code is a bad rear knock sensor. You should check the knock sensor wiring harness for corrosion. But if that checks out the sensor will have to be replaced. The knock sensor is under the intake manifold, although it's not too difficult to remove. Both knock sensors should be replaced along with the wiring harness, just because of labor involved in gaining access to the sensors. You could try clearing the code, it may stay off for a long time.
SOURCE: check engine light....coolant temperature sensor
take altanator off and it is located right behind
P0137....O2 Sensor Circuit Low Voltage (Bank 1 Sensor 2)
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