P0960
Pressure Control Solenoid A Control Circuit / Open
Powertrain Transmission Control Solenoid circuit 🟡 Moderate — Fix within a week
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What This Actually Means
In plain language — no jargon

The transmission's pressure control solenoid A has a broken electrical connection, like a light switch with a loose wire. The engine computer can't send signals to control transmission fluid pressure properly.

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Symptoms You May Notice
3 known symptoms for this code
Transmission shifting harshly or erratically
Check Engine Light illuminated
Limp mode or reduced power
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Embedded Systems Insight
What the ECU/ECM is actually computing

The ECM monitors voltage and current flow through the solenoid control circuit. It expects specific resistance and continuity when commanding the solenoid on/off. An open circuit means zero current flow, triggering the fault code.

Voltage & Parameter Thresholds

Parameter Normal Range Fault Condition
Solenoid Circuit Resistance 4-12 ohms Infinite resistance (open)
Control Signal Voltage 0V or 12V switching No voltage change detected
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Diagnostic & DIY Fix Guide
Check these in order — from cheapest to most complex
1
Wiring harness connector
Inspect and reseat the solenoid connector; clean corroded pins with electrical contact cleaner.
2
Wiring harness
Check for broken or pinched wires between ECM and solenoid; repair or replace damaged sections.
3
Pressure control solenoid A
Replace the solenoid if continuity test fails and wiring is confirmed good.