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 has detected a problem with the circuit that controls the manual shifting in an automatic transmission. It's like when a light switch in your house isn't working because there's a problem with the wiring.
The P0953 code is triggered when the transmission control module (TCM) detects a high voltage condition in the auto shift manual control circuit.
The auto shift manual control circuit is responsible for allowing the driver to manually shift gears in an automatic transmission. A high voltage condition in this circuit can indicate issues such as a short to power or a faulty component within the circuit. The TCM monitors this circuit and sets the P0953 code when it detects a voltage level that is higher than expected.
• Check Engine Light is on
• Transmission may not shift properly
• Manual shifting mode may not work
• Faulty shift control switch
• Short to power in the shift control circuit
• Faulty transmission control module (TCM)
TCM: Transmission Control Module
OBD-II: On-Board Diagnostics, Second Generation
• Use an OBD-II scanner to confirm the code.
• Inspect the shift control switch and wiring for damage.
• Test the circuit for a short to power.
• Replace the faulty shift control switch.
• Repair or replace damaged wiring.
• Replace the transmission control module if necessary.
• OBD-II scanner
• Multimeter
• Screwdriver set
$150 - $500
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly inspect transmission wiring and connectors.
• Avoid harsh shifting or overloading the vehicle.
• Keep the transmission fluid clean and at the proper level.
Transmission Control Issue
• Avoid using manual shift mode until the issue is resolved.
• Have the vehicle inspected by a professional mechanic.
Check with your vehicle manufacturer as transmission components may be covered under powertrain warranty.
The P0953 code has been associated with issues in vehicles with manual shift modes in automatic transmissions, particularly in models with high mileage.
Moderate – It is recommended to address this issue soon to prevent potential transmission damage.
Driving with a malfunctioning transmission can be unsafe. Address the issue promptly to ensure vehicle safety.
• Vehicle in park with engine running
• Attempt to engage manual shift mode
The shift control switch is typically located on the gear shifter or steering column.
Q: Can I drive with the P0953 code?
A: It's possible to drive, but it's not recommended as it may cause further transmission issues.
Q: Will the check engine light turn off after repairs?
A: Yes, once the issue is resolved, the check engine light should turn off after a few drive cycles.
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