2003 Chevrolet Avalanche 1500 Q&A
2003 Chevrolet Avalanche 1500 Question: Knock Sensor?
When I bought my car from the dealer used, the knock sensor light came on, and dealer told me that they reset it, and that if it comes on again, they would pay for a new sensor. What if it's not the sensor, but an actual knock in the engine? Would I hear it? Is there major problems associated with this engine message? Thank you, Chris Kennedy - Verno
The knock sensor doesn't usually set codes from engine knock. If it detects engine knock then the pcm retards timing, cuts back fuel, etc.. but does not actually set a code. If the sensor has voltage going to it from the pcm then just replace it but make sure if the place you bought your car from does it they don't just ground the wire. This will effectively turn off the light & eliminate the knock sensor. - certified.ase.tech
My knock sensor went out on my 2003 avalanche. It's not an easy job the knock sensor is located inder the intake manifold. Normally this is the problem. - lazy mechanic
Check engine light is off now
The check engine light stays on all the time. I had it scanned and was told it was Kock Sensors (x2). What is the knock sensors and how is it repaired and about how much is the cost?
Replaced knock sensors. Started fine. Did not correct slight misfire. Was pulling plug wires and injector wires to isolate the cylinder. Slipped and broke the heater hose off the core. Sprayed me i...