P0985 Toyota Code - Shift Solenoid 'E' Control Circuit Low
Quick Answer
The P0985 diagnostic trouble code (DTC) for Toyota vehicles indicates an issue with the Shift Solenoid 'E' Control Circuit being detected as low. Common causes include Faulty Shift Solenoid 'E': The solenoid itself may be malfunctioning, causing it to send a low signal to the PCM, Wiring issues: Damage, corrosion, or poor connections in the wiring harness can disrupt the signal between the solenoid and the PCM, PCM failure: A malfunction in the powertrain control module can prevent the proper operation of the solenoid. 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
- P0985 Toyota indicates Shift Solenoid 'E' Control Circuit Low.
- Common causes
- Common causes include Faulty Shift Solenoid 'E': The solenoid itself may be malfunctioning, causing it to send a low signal to the PCM, Wiring issues: Damage, corrosion, or poor connections in the wiring harness can disrupt the signal between the solenoid and the PCM, PCM failure: A malfunction in the powertrain control module can prevent the proper operation of the solenoid.
- 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 P0985 Toyota Description
The P0985 diagnostic trouble code (DTC) for Toyota vehicles indicates an issue with the Shift Solenoid 'E' Control Circuit being detected as low. In automatic transmissions, shift solenoids are responsible for controlling the flow of transmission fluid, which in turn controls the shifting of gears. The 'E' solenoid specifically controls the shifting into a particular gear. When this solenoid is not functioning properly due to a low signal, it can lead to erratic shifting, harsh shifting, or even a failure to shift gears altogether.
Common Causes of P0985 Toyota
- Faulty Shift Solenoid 'E': The solenoid itself may be malfunctioning, causing it to send a low signal to the PCM.
- Wiring issues: Damage, corrosion, or poor connections in the wiring harness can disrupt the signal between the solenoid and the PCM.
- PCM failure: A malfunction in the powertrain control module can prevent the proper operation of the solenoid.
- Low transmission fluid level: In some cases, a low transmission fluid level can affect the solenoid's performance, leading to a low signal being detected.
- Electrical issues: Other electrical problems, such as a blown fuse or a short circuit, can also affect the control circuit of the solenoid.
Symptoms of P0985 Toyota
- Erratic or harsh shifting: The vehicle may experience abrupt or delayed shifts, making the driving experience uncomfortable and potentially unsafe.
- Failure to shift gears: The transmission may get stuck in a specific gear, limiting the vehicle's speed and performance.
- Transmission slipping: The engine may rev higher than usual without a corresponding increase in vehicle speed, indicating a slipping transmission.
- Illuminated Check Engine Light: The Check Engine Light may come on to indicate a problem with the transmission system.
How to Fix P0985 Toyota
- Diagnose the issue: Use a scan tool to retrieve the DTC and perform a thorough inspection of the Shift Solenoid 'E' and its control circuit.
- Replace the Shift Solenoid 'E': If the solenoid is found to be faulty, it will need to be replaced with a new one.
- Repair wiring or connections: Inspect the wiring harness for damage or corrosion and repair or replace any affected wires or connectors.
- Test the PCM: Check the powertrain control module for any faults or errors and replace if necessary.
- Clear the DTC: After completing the repair, clear the DTC from the PCM and test drive the vehicle to ensure that the issue has been resolved.
Cost to Fix P0985 Toyota
The cost of repairing a Shift Solenoid 'E' Control Circuit Low issue can vary depending on the specific cause of the problem and the labor rates in your area. On average, the cost of replacing a shift solenoid can range from $150 to $400, including parts and labor. However, if additional repairs or replacements are needed, the cost can increase. It is recommended to consult with a trusted mechanic or auto repair shop for a more accurate estimate based on your vehicle's make and model.
Tech Notes for P0985 Toyota
2004 Toyota Sienna Factory Service Bulletin OBDII Code P0985
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Information for Specific Toyota Models
- P0985 2007 Toyota Camry — Shift Solenoid 'E' Control Circuit Low Valve SR
- P0985 2008 Toyota Camry — Shift Solenoid 'E' Control Circuit Low Valve SR
- P0985 2009 Toyota Camry — Shift Solenoid 'E' Control Circuit Low Valve SR
- P0985 2010 Toyota Camry — Shift Solenoid 'E' Control Circuit Low Valve SR
- P0985 2011 Toyota Camry — Shift Solenoid 'E' Control Circuit Low Valve SR
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