What Does P2622 Mean?
The PCM has detected abnormally high voltage in the throttle position output circuit. This typically indicates a short to power or an open ground in the throttle control system.
Safety Warning
Engine may run at unintended speed or enter limp mode. Vehicle is unsafe to drive until repaired due to potential loss of throttle control.
Common Causes
35%
Wiring shorted to battery voltage in throttle position output circuit
30%
Open or high resistance in ground circuit for throttle actuator
20%
Failed throttle body actuator with internal fault
15%
PCM internal fault with failed output driver
Diagnostic Steps
1
Step 1: Check all ground connections for throttle body and PCM for tightness and corrosion
2
Step 2: Disconnect throttle body and check for unwanted voltage on control wires (should be 0V with key off)
3
Step 3: Inspect wiring harness for shorts to power, especially near battery and alternator
4
Step 4: Measure throttle motor circuit resistance and verify ground circuit continuity (<0.5 ohms)
5
Step 5: Verify PCM output signal voltage stays within normal operating range (typically 0-5V or 0-12V PWM)
Estimated Repair Cost
$200 - $1,200
Parts + labor, varies by vehicle and location
The PCM has detected abnormally high voltage in the throttle position output circuit. This typically indicates a short to power or an open ground in the throttle control system.
The most common cause of P2622 (Throttle Position Output Circuit High) is: Wiring shorted to battery voltage in throttle position output circuit
Typical repair costs for P2622 range from $200 to $1,200, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Engine may run at unintended speed or enter limp mode. Vehicle is unsafe to drive until repaired due to potential loss of throttle control.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2622 to identify the root cause.
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Quick Info
Category
Powertrain
System
Electronic Throttle Control
Difficulty
Type
Generic (SAE)
Recommended Tools
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