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 with the part that tells it how much you're pressing the gas pedal.
The P1625 code is triggered when there is an electrical issue with the second channel of the pedal position sensor, which is responsible for sending signals to the engine control unit (ECU) to indicate how much the accelerator pedal is being pressed.
The Pedal Position Sensor (PPS) is a potentiometer that sends a variable voltage signal to the ECU, indicating the position of the accelerator pedal. Channel 2 refers to a redundant or secondary signal path used for safety and accuracy. An electrical fault in this channel can cause incorrect throttle response or engine performance issues.
• Check Engine Light is on
• Poor throttle response
• Vehicle may enter 'limp' mode
• Faulty pedal position sensor
• Wiring issues or poor connections
• Failed ECU
ECU: Engine Control Unit
PPS: Pedal Position Sensor
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connections to the pedal position sensor.
• Test the pedal position sensor for proper voltage and resistance.
• Repair or replace damaged wiring or connectors.
• Replace the pedal position sensor if faulty.
• Reprogram or replace the ECU if necessary.
• OBD-II scanner
• Multimeter
• Screwdriver set
$150 - $400
Moderate
• Chevrolet Silverado
• GMC Sierra
• Cadillac Escalade
• Regularly inspect and maintain electrical connections.
• Avoid exposure of electrical components to moisture.
• Perform regular diagnostic checks.
Sensor Issue
• Avoid driving the vehicle until repaired to prevent further damage.
• Consult a professional mechanic for accurate diagnosis.
Check vehicle warranty for coverage on electronic components.
This code has been associated with issues in vehicles with electronic throttle control systems.
Moderate – Should be addressed soon to avoid potential drivability issues.
Driving with this code active may affect vehicle performance and safety.
• Engine running
• Accelerator pedal pressed
The pedal position sensor is located on the accelerator pedal assembly.
Q: Can I drive with a P1625 code?
A: It's not recommended as it may affect throttle response and safety.
Q: How do I clear a P1625 code?
A: After repairs, use an OBD-II scanner to clear the code.
High-End · Full-system diagnostics
A full-system bidirectional platform aimed at advanced DIY users and professional diagnostic workflows.
Network faults often require full-system access instead of a generic code reader alone.
View on Amazon
Universal · Digital multimeter
A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.
Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.
View on Amazon
Universal · Wire connectors and repair kit
Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.
Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.
View on AmazonThese are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.