How to check the throttle position sensor with a scan tool?
Connect the scan tool again and switch the car to KOEO mode. On the scanner, navigate to live data and lock the TP sensor on the display screen. Use live data graphing if your scanner supports it. Step 6. Analyze graph
What does it mean when check engine light is on but no codes?
No code being generated on the reader does not mean the driver is in the clear. In fact, when the light is on, the odds are just as high that there has actually been something wrong for a while even if no code is generated.
What causes the throttle to stick in open position?
Use a scan tool to diagnose the issue and then fix it before attempting to take the car on the road. Just in case you’re wondering, a failed TPS will force the throttle body valve to either shut or stick in an open position. In the latter case, the engine will receive excess air.
How to reset throttle body calibration [ step by step guide ]?
Make sure that the accelerator pedal is fully released. Turn ignition switch “ON” and wait at least 2 seconds. Turn ignition switch “OFF” wait at least 10 seconds. Turn ignition switch “ON” and wait at least 2 seconds. Turn ignition switch “OFF” wait at least 10 seconds.
Connect the scan tool again and switch the car to KOEO mode. On the scanner, navigate to live data and lock the TP sensor on the display screen. Use live data graphing if your scanner supports it. Step 6. Analyze graph
Can a code reader turn off the Check Engine light?
With a code reader you can easily clear codes and turn off the “check engine” light, but you will however not be able to check for readiness and may fail to get a sticker in case your vehicle finds itself at the DMV’s office.
How to do throttle body re-Learn Chevy Malibu?
1) Start the engine and let it idle in park for 3 minutes. During that period the idle may be higher idle than normal. 2) After 3 minutes, turn the engine off and leave it off for 60- seconds. 3) Start the engine again and let it idle in park for 3 minutes one more time. During these run periods you may see a check engine light.
How does a GM throttle body relearn procedure?
A motor and gear reduction set inside the throttle body opens and closes the throttle plate to accomplish your request. Over time, carbon buildup can accumulate around the throttle plate, changing it’s “home” position. If the buildup occurs gradually, the PCM “learns” the new home position.