Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer is having trouble reading the position of the gas pedal. It's like when a video game controller doesn't work right, and the game character doesn't move smoothly.
The P2129 code is triggered when the Engine Control Module (ECM) detects an intermittent signal from the throttle/pedal position sensor or switch E circuit.
The throttle/pedal position sensor/switch E circuit is responsible for sending the position of the throttle or pedal to the ECM. An intermittent signal means that the connection is not stable, which can cause issues with how the engine responds to throttle input.
• Check Engine Light is on
• Poor throttle response
• Engine may go into 'limp' mode
• Faulty throttle/pedal position sensor
• Wiring issues such as damaged or corroded connectors
• Faulty ECM
ECM: Engine Control Module
OBD-II: On-Board Diagnostics II
• Use an OBD-II scanner to confirm the code
• Inspect the wiring and connectors for damage or corrosion
• Test the throttle/pedal position sensor for proper operation
• Repair or replace damaged wiring or connectors
• Replace the throttle/pedal position sensor
• Reprogram or replace the ECM if necessary
• OBD-II scanner
• Multimeter
• Basic hand tools
$100 - $400
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly inspect and clean connectors
• Ensure proper maintenance of the vehicle's electrical system
• Avoid exposure to excessive moisture
Sensor Issue
• Avoid driving at high speeds until the issue is resolved
• Have the vehicle inspected by a professional as soon as possible
Check with the manufacturer for warranty coverage on the throttle/pedal position sensor and related components.
This code has been reported in vehicles with electronic throttle control systems, which have become more common in modern vehicles.
Moderate – It is advisable to address this issue soon to avoid potential drivability problems.
Driving with a faulty throttle position sensor can lead to unexpected vehicle behavior, which may be unsafe.
• Engine running
• Vehicle in motion
The throttle/pedal position sensor is typically located on the throttle body or near the accelerator pedal.
Q: Can I drive with a P2129 code?
A: It's not recommended to drive with this code for long periods, as it can affect vehicle performance and safety.
Q: How do I clear a P2129 code?
A: After repairs, use an OBD-II scanner to clear the code from the ECM.
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