What causes GM code 22?

Open TPS signal wire or unplugged sensor connector Sensor ground circuit open Failed sensor with low output across the sweep Short to ground in the signal wiring

How do I fix GM code 22?

Read TPS voltage through the ALDL port and confirm it stays near zero Inspect the connector and ground splice for opens and corrosion Sweep the throttle while watching voltage for dropouts Test reference voltage at the sensor before condemning it Replace the sensor only after power and ground test good

22 Throttle Position Sensor Error Signal Low

Q: What does GM code 22 mean?

GM code 22. Throttle Position Sensor Error Signal Low. Applies to 1982-1995 GM cars and C/K trucks, Camaro, Corvette.

Make: GM (1982-1995)
Category: Powertrain - Fuel/Air Metering
Severity: Check Engine Light
Applies to: 1982-1995 GM cars and C/K trucks, Camaro, Corvette

How to read it

Code 22 reads as 2 flashes, pause, 2 flashes on the check-engine light. Jump terminals A and B on the ALDL connector with the key off, then turn the key on with the engine off and count the check-engine flashes.

What does GM code 22 mean?

22. Throttle Position Sensor Error Signal Low. This code sets when your vehicle computer detects throttle position sensor error signal low.

Common causes of 22

Open TPS signal wire or unplugged sensor connector
Sensor ground circuit open
Failed sensor with low output across the sweep
Short to ground in the signal wiring

How to fix 22

Read TPS voltage through the ALDL port and confirm it stays near zero
Inspect the connector and ground splice for opens and corrosion
Sweep the throttle while watching voltage for dropouts
Test reference voltage at the sensor before condemning it
Replace the sensor only after power and ground test good