P0966 Code - Pressure Control Solenoid 'B' Control Circuit Low
Quick Answer
The OBD-II code P0966 indicates a problem with the Pressure Control Solenoid 'B' Control Circuit in an automatic transmission. Common causes include Faulty pressure control solenoid 'B', Damaged wiring or connectors in the control circuit, Low transmission fluid levels. 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
- P0966 indicates Pressure Control Solenoid 'B' Control Circuit Low.
- Common causes
- Common causes include Faulty pressure control solenoid 'B', Damaged wiring or connectors in the control circuit, Low transmission fluid levels.
- 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 P0966 Description
The OBD-II code P0966 indicates a problem with the Pressure Control Solenoid 'B' Control Circuit in an automatic transmission. The pressure control solenoid is responsible for regulating the hydraulic pressure in the transmission, which is crucial for shifting gears smoothly. When the control circuit for this solenoid is detected to be operating at a low voltage, it can lead to various issues with the transmission's performance.
Common Causes of P0966
- Faulty pressure control solenoid 'B'
- Damaged wiring or connectors in the control circuit
- Low transmission fluid levels
- Internal transmission problems
- Electrical issues in the transmission control module
Symptoms of P0966
- Harsh or delayed shifting
- Erratic shifting patterns
- Transmission slipping
- Inability to shift gears
- Illumination of the Check Engine Light
How to Fix P0966
- Begin by conducting a thorough inspection of the transmission system, including checking the transmission fluid level and condition.
- Use a scan tool to diagnose the specific cause of the P0966 code and identify any other related codes that may be present.
- Inspect the wiring and connectors in the pressure control solenoid 'B' control circuit for any signs of damage or corrosion.
- Test the pressure control solenoid 'B' to determine if it is functioning properly, and replace it if necessary.
- Clear the diagnostic trouble codes from the vehicle's computer and test drive the vehicle to ensure that the issue has been resolved.
Cost to Fix P0966
The typical repair costs for addressing the P0966 code can vary depending on the specific cause of the issue. In general, replacing a pressure control solenoid 'B' can cost between $150 and $300 for the part alone. Labor costs can range from $100 to $200, with total repair costs potentially amounting to $250 to $500. It's important to note that these estimates are approximate, and actual costs may vary based on factors such as location, vehicle make and model, and the shop's labor rates. It is advisable to consult with a qualified mechanic or auto repair shop for a more accurate cost estimate.
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Code P0966 Information for Specific Makes
- P0966 Acura — A/T Clutch Pressure Control Solenoid Valve 'B' Circuit Low
- P0966 Buick — Pressure Control Solenoid Valve 2 Control Circuit Low Voltage
- P0966 Cadillac — Pressure Control Solenoid Valve 2 Control Circuit Low Voltage
- P0966 Chevrolet — Pressure Control Solenoid Valve 2 Control Circuit Low Voltage
- P0966 Dodge — Pressure Control Solenoid 'B' Control Circuit Low
- P0966 GMC — Pressure Control Solenoid Valve 2 Control Circuit Low Voltage
- P0966 Honda — A/T Clutch Pressure Control Solenoid Valve 'B' Circuit Low
- P0966 Pontiac — Clutch Pressure Control Solenoid 2 Control Circuit Low Voltage
- P0966 Saturn — Clutch Pressure Control Solenoid 2 Control Circuit Low Voltage
Frequently Asked Questions about P0966 Code
1. What does the OBDII code P0966 mean?
P0966 indicates that the Powertrain Control Module (PCM) has detected a low voltage or electrical issue in the Pressure Control Solenoid 'B' control circuit.
2. What are the common symptoms of code P0966?
Symptoms may include transmission slipping, harsh shifting, poor fuel efficiency, limp mode activation, or the illumination of the check engine light.
3. What causes the P0966 code to occur?
Common causes include a faulty pressure control solenoid, damaged or corroded wiring, a defective PCM, or low transmission fluid levels.
4. Can driving with a P0966 code damage my vehicle?
Yes, driving with this code can damage the transmission over time if the issue is not addressed, as improper pressure control can lead to further mechanical problems.
5. How is the P0966 code diagnosed?
A technician will typically use a scan tool to verify the code, inspect wiring and connectors for damage, test the solenoid's resistance, and check the transmission fluid level and condition.
6. How do you fix the P0966 code?
Repairs may include replacing the pressure control solenoid, repairing or replacing damaged wiring, cleaning corroded connectors, or reprogramming the PCM if necessary.
7. Can low transmission fluid trigger the P0966 code?
Yes, low or dirty transmission fluid can affect the solenoid's operation and cause the PCM to register this code.
8. How much does it cost to fix the P0966 code?
Repair costs vary but typically range from $150 to $500, depending on whether the solenoid, wiring, or PCM needs replacement.
9. Can I reset the P0966 code without repairing the issue?
While you can clear the code with an OBDII scanner, it will likely return if the underlying problem isn't resolved.
10. Is the P0966 code specific to any vehicle make or model?
No, P0966 is a generic OBDII code and can appear on any vehicle with an automatic transmission, but the exact diagnostic and repair steps may vary by manufacturer.
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