Code 22 - TPS Signal Volt Low
The Throttle Position Sensor (TPS) provides a voltage signal that changes relative to the throttle valve. Signal voltage will vary from about .5 volts at idle to 4.5 volts at WOT. Code 22 will set if TPS voltage is less than 2.5 volts for 2 seconds and engine speed is less than 1600 RPM (2.0L-1200 RPM).
NOTE:
The following step numbers refer to the numbers in the accompanying flow chart(s).
- This test confirms Code 22 and that a fault is present.
- This test simulates Code 21. If the ECM recognizes the high voltage and sets Code 21, the ECM and wiring are good.
- This test checks for reference voltage from the ECM. To prevent damage to ECM, be sure to disconnect White connector when checking circuit wiring for open or shorts to ground.