P0973 Lexus Code - Shift Solenoid 'A' Control Circuit Low
Quick Answer
The P0973 diagnostic trouble code (DTC) for Lexus vehicles indicates a malfunction in the Shift Solenoid 'A' Control Circuit. Common causes include Faulty shift solenoid 'A', Wiring or connector issues in the control circuit, Low transmission fluid level or contaminated 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
- P0973 Lexus indicates Shift Solenoid 'A' Control Circuit Low.
- Common causes
- Common causes include Faulty shift solenoid 'A', Wiring or connector issues in the control circuit, Low transmission fluid level or contaminated 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 P0973 Lexus Description
The P0973 diagnostic trouble code (DTC) for Lexus vehicles indicates a malfunction in the Shift Solenoid 'A' Control Circuit. In automatic transmissions, solenoids play a crucial role in controlling the flow of transmission fluid to engage the various gears. Solenoid 'A' is responsible for regulating the transmission fluid pressure to facilitate smooth gear shifting. When the control circuit for this solenoid experiences a low voltage condition, it can lead to erratic shifting behavior, transmission slippage, or even a failure to shift gears altogether.
Common Causes of P0973 Lexus
- Faulty shift solenoid 'A'
- Wiring or connector issues in the control circuit
- Low transmission fluid level or contaminated fluid
- Internal transmission damage or wear
- Electronic control module (ECM) malfunction
Symptoms of P0973 Lexus
- Harsh or delayed shifting
- Transmission slipping or jerking
- Inability to shift gears
- Transmission stuck in one gear
- Illumination of the check engine light
How to Fix P0973 Lexus
- Begin by performing a thorough visual inspection of the wiring harness and connectors related to the shift solenoid 'A'. Look for any signs of damage, corrosion, or loose connections. Repair or replace any damaged components as necessary.
- Check the transmission fluid level and condition. If the fluid is low or contaminated, perform a fluid flush and refill. Ensure that the transmission fluid meets the manufacturer's specifications.
- Test the shift solenoid 'A' using a multimeter to verify its functionality. If the solenoid is faulty, replace it with a new, OEM-approved part.
- Clear the DTC from the vehicle's ECM using a scan tool and perform a test drive to confirm that the issue has been resolved. Monitor the transmission's behavior to ensure smooth shifting and proper operation.
- If the problem persists, further diagnostics may be required to identify any underlying issues with the transmission system. Consult a professional mechanic or transmission specialist for further assistance.
Cost to Fix P0973 Lexus
The typical repair costs for addressing the P0973 code in a Lexus vehicle can vary depending on the specific cause of the issue and the labor rates in your area. Generally, replacing a shift solenoid 'A' and addressing related wiring or fluid issues can range from $200 to $500 in parts and labor. Keep in mind that diagnostic time and labor rates at auto repair shops can fluctuate based on location, vehicle make and model, and the complexity of the repair. It is advisable to obtain a detailed estimate from a reputable mechanic or dealership to determine the exact cost for your vehicle.
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