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 computer in your car has detected a problem with the part that helps change gears. It's like if a robot arm that helps you pick up toys stopped working properly.
The P0974 code is triggered when the powertrain control module (PCM) detects a high voltage condition in the shift solenoid A control circuit.
Shift solenoids are responsible for controlling the flow of transmission fluid in the valve body, which in turn controls the shifting of gears in an automatic transmission. The 'A' solenoid is one of several solenoids used to manage gear shifting. A 'high' condition indicates that the circuit might be open or shorted to power.
• Harsh or erratic shifting
• Transmission stuck in one gear
• Illuminated check engine light
• Faulty shift solenoid A
• Wiring issues such as open or short circuits
• Faulty transmission control module (TCM)
PCM: Powertrain Control Module
TCM: Transmission Control Module
• Use an OBD-II scanner to confirm the code and check for other related codes.
• Inspect the wiring and connectors for damage or corrosion.
• Test the shift solenoid A for proper operation using a multimeter.
• Repair or replace damaged wiring and connectors.
• Replace the faulty shift solenoid A.
• Reprogram or replace the transmission control module if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $400
Moderate
• Honda Accord
• Toyota Camry
• Ford F-150
• Regular transmission fluid changes
• Routine inspection of wiring and connectors
• Keeping the transmission system clean and free from debris
Transmission Control System
• Avoid driving long distances until the issue is resolved.
• Consult a professional mechanic for an accurate diagnosis.
Check with your vehicle's manufacturer for warranty coverage on transmission components.
This code has been associated with transmission issues in vehicles with automatic transmissions, particularly in models with known solenoid problems.
Moderate – It is advisable to address this issue soon to prevent further transmission damage.
Driving with a malfunctioning transmission can be unsafe and may lead to further damage.
• Engine running
• Vehicle in gear
The shift solenoid A is located inside the transmission, often attached to the valve body.
Q: Can I drive with a P0974 code?
A: It's not recommended as it may cause further damage to the transmission.
Q: How serious is the P0974 code?
A: It's moderately serious as it affects the transmission's ability to shift gears properly.
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