What Does P0960 Mean?
The TCM has detected an open circuit or general electrical fault in the control circuit for Pressure Control Solenoid A (PCS-A). This solenoid regulates transmission line pressure, which directly controls shift quality and clutch apply force. With an open circuit, the solenoid cannot be energized, typically causing the transmission to default to maximum line pressure, resulting in harsh, firm shifts. The transmission may also enter a failsafe or limp mode to protect internal components.
Safety Warning
The transmission will likely shift very harshly or enter limp mode, limiting the vehicle to a single gear. Continued driving with uncontrolled line pressure can cause premature clutch and band failure. Minimize driving and have the vehicle diagnosed promptly.
Common Causes
35%
Failed Pressure Control Solenoid A (internal open winding)
30%
Broken or disconnected wire in the PCS-A control circuit between TCM and solenoid
20%
Corroded or damaged connector at the transmission case pass-through or solenoid body
10%
Faulty TCM solenoid driver circuit unable to command the solenoid
5%
Contaminated transmission fluid causing solenoid coil degradation
Diagnostic Steps
1
Check the transmission fluid level and condition — dark, burnt, or debris-laden fluid accelerates solenoid failure and can indicate broader internal issues.
2
Access the transmission case connector and inspect for corrosion, bent pins, water intrusion, or heat damage. Many PCS circuit faults originate at this connector.
3
Measure the resistance of PCS-A at the transmission connector — typical specification is 4-8 ohms depending on the application. An infinite (OL) reading confirms an open solenoid or wiring break.
4
If the solenoid measures open at the transmission connector, disconnect the internal harness from the solenoid body and measure the solenoid alone to isolate whether the open is in the solenoid or the internal harness.
5
Check for continuity from the TCM connector pins for PCS-A back to the transmission case connector. Repair any open wiring found in the external harness.
6
If all wiring and the solenoid test within specification, suspect a failed TCM solenoid driver. Monitor commanded vs. actual current on the PCS-A circuit using enhanced scan tool data.
Estimated Repair Cost
$200 - $1,500
Parts + labor, varies by vehicle and location
The TCM has detected an open circuit or general electrical fault in the control circuit for Pressure Control Solenoid A (PCS-A). This solenoid regulates transmission line pressure, which directly controls shift quality and clutch apply force. With an open circuit, the solenoid cannot be energized, t...
The most common cause of P0960 (Pressure Control Solenoid "A" Control Circuit/Open) is: Failed Pressure Control Solenoid A (internal open winding)
Typical repair costs for P0960 range from $200 to $1,500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
The transmission will likely shift very harshly or enter limp mode, limiting the vehicle to a single gear. Continued driving with uncontrolled line pressure can cause premature clutch and band failure. Minimize driving and have the vehicle diagnosed promptly.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0960 to identify the root cause.
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Quick Info
Category
Powertrain
System
Automatic Transmission / Transaxle
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
