The P0966: Pressure Control Solenoid ‘B’ Control Circuit Low refers to a situation where the pressure control solenoid ‘B’ circuit is experiencing low voltage, preventing the solenoid from regulating transmission fluid pressure properly. This can lead to poor shifting and transmission performance.
P0966 – Quick Overview
| Code | Information |
|---|---|
| Meaning | P0966: Pressure Control Solenoid ‘B’ Control Circuit Low |
| Is it serious? | Yes, low voltage can prevent proper transmission pressure regulation, leading to shifting issues. |
| Possible causes | – Low voltage in the pressure control solenoid ‘B’ circuit – Faulty pressure control solenoid ‘B’ – Wiring or connector issues |
| How to diagnose? | – Check the circuit for low voltage – Inspect wiring and connectors – Replace the pressure control solenoid ‘B’ if necessary |
P0966 Meaning
The P0966: Pressure Control Solenoid ‘B’ Control Circuit Low code indicates that the voltage in the pressure control solenoid ‘B’ circuit is below the required level. The pressure control solenoid ‘B’ is responsible for regulating hydraulic pressure in the transmission, and low voltage can result in improper shifting or transmission issues.
Step-by-step diagnostic guide
| Action | Description | Tools Needed |
|---|---|---|
| Check for Other Codes | Use an OBD-II scanner to check for additional fault codes that may provide more insight into the low voltage issue. | OBD-II Scanner |
| Test for Low Voltage | Use a multimeter to test for low voltage in the pressure control solenoid ‘B’ circuit. Compare the readings to the manufacturer’s specifications. | Multimeter |
| Inspect Wiring and Connectors | Inspect the wiring and connectors for damage, corrosion, or loose connections that could be causing low voltage in the circuit. | Flashlight, Multimeter |
| Test the Solenoid | Test the pressure control solenoid ‘B’ for proper operation. If the solenoid is faulty or receiving low voltage, replace it. | Diagnostic Tool, Replacement Solenoid |
| Clear the Code and Test Drive | After making repairs, clear the code using an OBD-II scanner and take the vehicle for a test drive to confirm that the issue is resolved. | OBD-II Scanner, Vehicle Owner’s Manual |
| Recheck for Codes | Re-scan the system to ensure the P0966 code does not reappear after the test drive. | OBD-II Scanner |
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