• Check Engine Light is on
• Transmission may not shift properly
• Vehicle may not go into the correct gear
• Faulty gear position sensor
• Damaged wiring or connectors
• Transmission control module malfunction
Gear Selector Lever: The lever used to change gears in a vehicle.
Transmission Control Module (TCM): A computer that controls the transmission functions.
• P0705
• P0706
Gear Selector Lever GSL4 Circuit Range/Performance
This code means that the car's computer is having trouble understanding the position of the gear shifter. It's like when you can't tell if a light switch is on or off.
The P1879 code indicates an issue with the electrical circuit related to the gear selector lever, specifically in its fourth position.
The P1879 code is triggered when the transmission control module (TCM) detects a problem with the circuit that monitors the gear selector lever's position, particularly in the GSL4 (fourth gear) range. This could be due to a fault in the sensor, wiring, or connectors involved in this circuit.
• Inspect the gear position sensor for damage
• Check the wiring and connectors for corrosion or damage
• Test the transmission control module for faults
• Replace the gear position sensor if faulty
• Repair or replace damaged wiring or connectors
• Reprogram or replace the transmission control module if necessary
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $500
Moderate
• Chevrolet Silverado
• GMC Sierra
• Ford F-150
• Regularly inspect and maintain transmission components
• Ensure wiring and connectors are clean and secure
• Avoid harsh driving conditions that can stress the transmission
Sensor Issue
• Have the vehicle inspected by a professional if the Check Engine Light comes on
• Avoid driving the vehicle if it doesn't shift properly
• Regular maintenance can help prevent this issue
Check with your vehicle's manufacturer for specific warranty coverage on transmission components.
The P1879 code has been reported in vehicles with automatic transmissions, particularly in models with electronic gear selectors.
Moderate – It's important to address this issue to prevent potential transmission damage.
Driving with a malfunctioning transmission can be unsafe. Address the issue promptly to ensure vehicle safety.
• Vehicle stationary with engine running
• Gear selector moved through all positions
The gear position sensor is typically located on the transmission or near the gear selector mechanism.
Q: Can I drive with a P1879 code?
A: It's not recommended to drive with this code active, as it could lead to transmission issues.
Q: How do I clear a P1879 code?
A: After repairs, use an OBD-II scanner to clear the code. If the issue is fixed, it should not return.
