Code
P0960
LAND ROVER
P — Powertrain
Pressure Control Solenoid A control - circuit/open
Views:
UK: 11
EN: 23
RU: 16
AI status
Completed
Completed
100%
Causes
- Open or shorted wiring in the solenoid control circuit
- Disconnected, corroded or damaged connector/pins at the solenoid or TCM
- Failed pressure control solenoid A (coil open)
- Blown fuse or faulty relay supplying the transmission control circuit
- Poor ground or power supply issue
- Faulty Transmission Control Module (TCM) or driver transistor
Symptoms
- Malfunction Indicator Lamp (MIL) / Check Engine Light illuminated
- Automatic transmission may go into limp mode or default gear
- Delayed, harsh, or missing shifts
- Reduced drivability or loss of certain gears
- Transmission-related codes stored in addition to P0960
What to check
- Read freeze-frame and related transmission codes with a capable scan tool
- Visual inspection of solenoid connector and harness for damage, corrosion, or water
- Check fuses and relays related to transmission/TCM power
- Backprobe the solenoid connector and measure voltage with ignition ON and while commanding via scan tool
- Measure coil resistance of the solenoid with connector disconnected
- Check continuity between solenoid connector and TCM pins, and continuity to ground where applicable
Signal parameters
- Supply voltage to solenoid typically battery voltage (~12 V) at one terminal (verify vehicle spec)
- Driver is usually a low-side switch (TCM grounds the solenoid) — commanded voltage to ground via PWM
- Typical solenoid coil resistance often in the range ~10–40 ohms (varies by model) — consult Land Rover service manual for exact value
- Command signal: PWM duty from 0–100%; frequency typically 50–500 Hz depending on system
- Operating current when active typically tenths to a few amps (verify factory spec)
Diagnostic algorithm
- Retrieve all related codes and freeze frame data. Note conditions when the code set.
- Perform a visual inspection of the transmission harness, connectors and solenoid A for damage, corrosion or water intrusion.
- Verify fuses/relays for transmission/TCM power. Replace if blown or faulty.
- With ignition ON (engine OFF), backprobe the solenoid connector: verify battery supply at the power terminal and check the control terminal for switching when commanding the solenoid with a scan tool.
- Measure solenoid coil resistance with the connector disconnected. Compare to factory spec. An open (infinite) or very high resistance indicates a failed coil.
- Check continuity between the solenoid control pin and the TCM control pin; repair any open circuits. Check grounds for integrity.
- Use the scan tool to command the solenoid while monitoring voltage/duty and transmission behavior. If the TCM commands but no change occurs and wiring/power are good, likely solenoid failure.
- If wiring and solenoid test good, consider TCM output driver failure. Verify other solenoid outputs and related circuits before replacing the TCM.
- After repair, clear codes and perform a road test under the same conditions to confirm the fault does not return.
Likely causes
- Damaged connector pins or corrosion at the solenoid connector
- Broken/open wire or harness chafe between solenoid and TCM
- Failed solenoid coil (open circuit)
- Poor ground or supply at the transmission harness
- Less likely: TCM internal driver failure
Fault status
Status
P0960 - Pressure Control Solenoid A Control Circuit/Open. The TCM detected an open or abnormal condition in the control circuit for transmission pressure control solenoid A.
Repair difficulty: Medium
Diagnostic time: 1.0 - 3.0 hours
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