Throttle Position Output Circuit High
The P2622 code means the vehicle's onboard diagnostic system has detected: Throttle Position Output Circuit High. This is a moderate severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- hard
- Estimated cost
- $100 - $700 (parts and labor)
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Common Symptoms
- Transmission holding gears too long
- Harsh or late upshifts
- Increased fuel consumption
- Traction control light on
Probable Causes (Ranked by Likelihood)
- Short to voltage in throttle output wiring Very High
- ECM output driver stuck high High
- Wiring crossed with power circuit Moderate
- Aftermarket performance module affecting signal Low
Step-by-Step Diagnostic Procedure
-
Check throttle output wiring for short to power
-
Compare ECM internal throttle position to output value
-
Inspect wiring routing for contact with power wires
-
Remove aftermarket performance modules and retest
Frequently Asked Questions
Why does my transmission hold gears too long?
The high signal makes the transmission module think the driver is at wide-open throttle, so it delays upshifts for maximum acceleration even during light driving.
Can a performance chip cause P2622?
Yes. Aftermarket performance modules that modify throttle signal can cause the output to be higher than the ECM expects, triggering P2622.
Will P2622 increase my fuel consumption?
Yes. Late upshifts keep the engine at higher RPMs longer than necessary, significantly increasing fuel consumption.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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