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 getting a signal that is too high from the part that tells it what gear the car is in. It's like the car is confused about which gear it's in.
The P091D code is triggered when the vehicle's powertrain control module (PCM) detects a high voltage signal from the gear shift position circuit B, indicating a potential issue with the gear position sensor or related circuitry.
The gear shift position sensor provides the PCM with information about the current gear selection. If the PCM receives a signal that is higher than the expected range, it sets the P091D code. This could be due to a faulty sensor, wiring issues, or a problem with the PCM itself.
• Check Engine Light is on
• Inaccurate gear display on the dashboard
• Transmission may not shift properly
• Faulty gear shift position sensor
• Wiring issues or poor connections in the circuit
• Malfunctioning PCM
PCM: Powertrain Control Module
OBD-II: On-Board Diagnostics, Second Generation
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the gear shift position sensor for proper operation.
• Repair or replace damaged wiring or connectors.
• Replace the gear shift position sensor if faulty.
• Reprogram or replace the PCM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $400
Moderate
• Ford Focus
• Chevrolet Malibu
• Toyota Camry
• Regular maintenance checks on transmission components.
• Ensure connectors are clean and secure.
• Avoid harsh driving conditions that may stress the transmission.
Sensor Issue
• Have the code diagnosed and repaired promptly to avoid further transmission issues.
• Avoid driving the vehicle if shifting becomes erratic or unsafe.
Repairs may be covered under the vehicle's powertrain warranty if applicable.
This code is commonly associated with electronic transmission systems and has been reported in vehicles with advanced gear shift technologies.
Moderate – It is advisable to address this issue soon to prevent potential transmission damage.
Ignoring transmission-related codes can lead to unsafe driving conditions. Always address these issues promptly.
• Vehicle at operating temperature
• Engine running and transmission in gear
The gear shift position sensor is typically located on the transmission or gear selector assembly.
Q: Can I drive with a P091D code?
A: It's not recommended to drive with this code active, as it may lead to transmission issues or unsafe driving conditions.
Q: How can I prevent a P091D code?
A: Regular maintenance and ensuring all electrical connections are secure can help prevent this code.
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