What are the possible causes of a p0121 Chevrolet?
P0121 CHEVROLET Possible Causes 1 Faulty Throttle Position Sensor 2 Throttle Position Sensor harness is open or shorted 3 Throttle Position Sensor circuit poor electrical connection 4 Faulty Engine Control Module (ECM)
What does error code p0121 mean on a TP sensor?
Your car’s primary computer—also known as the powertrain control module (PCM)–monitors the operation of the TP sensor (s). If the module detects that the sensor is operating outside of a predetermined range, error code P0121 will be set.
Why is my VW p0121 throttle position sensor not working?
The reason is because scan tools take samplings of many different readings over just one or two data lines and can miss an intermittent drop out. Hook up your oscilliscope and watch the signal. It should sweep up and down smoothly with no drop outs or spikes. 3. If no problems were noticed, perform a wiggle test.
What is the error code for throttle position sensor?
If the module detects that the sensor is operating outside of a predetermined range, error code P0121 will be set. A throttle position sensor operating outside of a predetermined range can trigger code P0121.
P0121 CHEVROLET Possible Causes 1 Faulty Throttle Position Sensor 2 Throttle Position Sensor harness is open or shorted 3 Throttle Position Sensor circuit poor electrical connection 4 Faulty Engine Control Module (ECM)
Your car’s primary computer—also known as the powertrain control module (PCM)–monitors the operation of the TP sensor (s). If the module detects that the sensor is operating outside of a predetermined range, error code P0121 will be set.
If the module detects that the sensor is operating outside of a predetermined range, error code P0121 will be set. A throttle position sensor operating outside of a predetermined range can trigger code P0121.
What happens when code p0121 is triggered on ECM?
When code P0121 is triggered, your ECM will go into failsafe mode. Depending on the failsafe strategy of your car, this could lead to limited speeds or acceleration. This problem can also cause intermittent knocking and even stalling for your vehicle. In some cases, the car will not be capable of driving to the shop and will need to be towed.