What Does P2620 Mean?
The PCM has detected an open circuit or complete lack of signal from the throttle position output circuit. This code specifically relates to the output signal from the throttle control system, not the sensor input.
Safety Warning
Vehicle may enter limp mode with severely reduced power or fail to accelerate. Do not drive at highway speeds or in heavy traffic.
Common Causes
40%
Broken or disconnected wiring in throttle position output circuit
25%
Failed throttle body or throttle actuator control motor
20%
Corroded or damaged connector pins at throttle body or PCM
15%
Faulty PCM with failed output driver circuit
Diagnostic Steps
1
Step 1: Visually inspect throttle body connector for corrosion, bent pins, or damage
2
Step 2: Check wiring continuity from PCM to throttle body on all control circuits using wiring diagram
3
Step 3: Measure resistance of throttle motor windings (typically 1-10 ohms depending on vehicle)
4
Step 4: Monitor throttle position and commanded position with scan tool during key on/engine off test
5
Step 5: Perform PCM output test if available through bi-directional controls
Estimated Repair Cost
$200 - $1,200
Parts + labor, varies by vehicle and location
The PCM has detected an open circuit or complete lack of signal from the throttle position output circuit. This code specifically relates to the output signal from the throttle control system, not the sensor input.
The most common cause of P2620 (Throttle Position Output Circuit/Open) is: Broken or disconnected wiring in throttle position output circuit
Typical repair costs for P2620 range from $200 to $1,200, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle may enter limp mode with severely reduced power or fail to accelerate. Do not drive at highway speeds or in heavy traffic.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2620 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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