Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's a problem with the part of the car that helps you switch gears automatically. It's like when a remote control doesn't work right and you can't change the TV channels.
The P0951 code indicates an issue with the automatic shift manual control circuit, which affects the car's ability to change gears smoothly.
The P0951 code is triggered when the powertrain control module (PCM) detects a malfunction in the auto shift manual control circuit. This circuit is responsible for sending signals to the transmission to engage the correct gear based on the driver's input and driving conditions.
• Check Engine Light is on
• Difficulty or delay in shifting gears
• Transmission stuck in one gear
• Faulty shift control solenoid
• Damaged wiring or connectors in the shift control circuit
• Malfunctioning transmission control module (TCM)
PCM: Powertrain Control Module
TCM: Transmission Control Module
Solenoid: An electromechanical device used to control the flow of fluid in the transmission
• Use an OBD-II scanner to confirm the code and check for other related codes.
• Inspect the wiring and connectors in the shift control circuit for damage or corrosion.
• Test the shift control solenoid for proper operation.
• Repair or replace damaged wiring or connectors.
• Replace the faulty shift control solenoid.
• Reprogram or replace the transmission control module (TCM) if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $500
Moderate
• Honda Accord
• Toyota Camry
• Ford Fusion
• Regular maintenance of the transmission system
• Inspect and clean connectors and wiring periodically
• Use the correct transmission fluid
Transmission Control Issue
• Avoid driving the vehicle until the issue is resolved to prevent further damage.
• Consult with a professional mechanic for a thorough inspection.
Check if your vehicle's powertrain warranty covers transmission-related repairs.
The P0951 code has been associated with automatic transmission issues in vehicles with electronic shift controls since the early 2000s.
Moderate – It should be addressed soon to avoid potential transmission damage.
Ignoring this code can lead to unsafe driving conditions due to unpredictable transmission behavior.
• Vehicle at operating temperature
• Transmission in drive mode
The auto shift manual control circuit is located within the transmission system, often integrated with the transmission control module.
Q: Can I drive my car with a P0951 code?
A: It's not recommended to drive with this code as it can lead to transmission damage or unsafe driving conditions.
Q: How can I prevent a P0951 code?
A: Regular maintenance and inspections of the transmission system can help prevent this 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.