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 understanding where the gear shift is. It's like when you can't find the right button on a remote control.
The P091A code indicates an issue with the circuit that tells the car's computer what position the gear shift is in.
The P091A code is triggered when the transmission control module (TCM) detects a malfunction in the gear shift position circuit B. This circuit is responsible for sending signals to the TCM about the current position of the gear shift lever. A fault in this circuit can lead to incorrect or no information being sent to the TCM, affecting gear shifting operations.
• Check Engine Light is on
• Difficulty in shifting gears
• Transmission stuck in one gear
• Faulty gear shift position sensor
• Damaged wiring or connectors in the circuit
• Malfunctioning transmission control module
TCM: Transmission Control Module
OBD-II: On-Board Diagnostics, Second Generation
• Use an OBD-II scanner to confirm the code
• Inspect the gear shift position sensor and its wiring
• Test the transmission control module for faults
• Replace the gear shift position sensor
• Repair or replace damaged wiring/connectors
• Reprogram or replace the transmission control module
• OBD-II scanner
• Multimeter
• Screwdriver set
$150 - $500
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly inspect transmission wiring
• Keep the gear shift area clean and dry
• Schedule routine maintenance checks
Sensor Issue
• Do not ignore the Check Engine Light
• Get the vehicle inspected by a professional
• Avoid driving the vehicle if gear shifting is problematic
Check with your vehicle manufacturer for warranty coverage on transmission components.
This code has been commonly reported in vehicles with electronic gear shift systems, especially in models from the early 2010s.
Moderate – It is advisable to address this issue soon to avoid potential transmission damage.
Driving with a faulty gear shift position sensor can lead to unsafe driving conditions. It is recommended to address this issue promptly.
• Vehicle should be in a safe, stationary position
• Ensure the engine is off before inspecting components
The gear shift position sensor is typically located near the gear shift lever or within the transmission housing.
Q: Can I drive with a P091A code?
A: It's not recommended as it can lead to unsafe driving conditions and potential transmission damage.
Q: How do I reset the P091A code?
A: After repairs, use an OBD-II scanner to clear the code. However, ensure the issue is resolved first.
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