P0787 Code - Shift/Timing Solenoid Low
Quick Answer
The diagnostic trouble code P0787 indicates that the vehicle's transmission has detected a low voltage condition in the shift/timing solenoid C circuit. Common causes include Faulty shift/timing solenoid, Wiring or connector issues in the solenoid circuit, Low transmission fluid levels or dirty fluid. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0787 indicates Shift/Timing Solenoid Low.
- Common causes
- Common causes include Faulty shift/timing solenoid, Wiring or connector issues in the solenoid circuit, Low transmission fluid levels or dirty fluid.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code P0787 Description
The diagnostic trouble code P0787 indicates that the vehicle's transmission has detected a low voltage condition in the shift/timing solenoid C circuit. The shift solenoid is a crucial component in the transmission system that controls the flow of transmission fluid to engage the gears. When the solenoid receives a signal from the vehicle's engine control module (ECM) or transmission control module (TCM), it opens or closes to allow the appropriate amount of fluid to flow, enabling smooth gear changes.
Common Causes of P0787
- Faulty shift/timing solenoid
- Wiring or connector issues in the solenoid circuit
- Low transmission fluid levels or dirty fluid
- ECM or TCM malfunctions
- Mechanical issues within the transmission
Symptoms of P0787
- Rough or delayed shifting
- Slipping gears
- Harsh engagement when shifting
- Transmission overheating
- Illumination of the Check Engine Light
How to Fix P0787
- Begin by conducting a thorough inspection of the shift/timing solenoid and its connections to identify any visible damage or corrosion.
- Test the solenoid's resistance and voltage to determine if it is functioning within the manufacturer's specifications.
- Check the transmission fluid level and condition, topping off or replacing it if necessary.
- Inspect the wiring harness and connectors for any signs of damage, repairing or replacing as needed.
- Clear the trouble code from the vehicle's ECM/TCM memory using a diagnostic scanner and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P0787
The cost of repairing a shift/timing solenoid low issue can vary depending on the extent of the damage and the specific components that need to be replaced. On average, you can expect to pay between $200 and $500 for parts and labor. However, it's important to note that labor rates can vary significantly between different repair shops and locations. It's recommended to obtain quotes from multiple shops to ensure you're getting a fair price for the repair.
When is the Code Detected?
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Code P0787 Information for Specific Makes
- P0787 Isuzu — 3-2 Shift Solenoid Control Circuit Low Voltage
- P0787 Lexus — Shift/Timing Solenoid Low
- P0787 Mercedes-Benz — Shift/Timing Solenoid Low
- P0787 Scion — Shift/Timing Solenoid Low
- P0787 Toyota — Shift/Timing Solenoid Low
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