Universal (All Makes) Vehicle (OBD-II)
Severity:Common Causes
- map[cause:Open circuit in the TCC solenoid control wire]
- map[cause:Short to power in the solenoid wiring harness]
- map[cause:Failed solenoid with an open internal circuit]
- map[cause:Disconnected or corroded solenoid connector]
- map[cause:TCM driver failure — the control transistor has failed]
How to Fix It
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Check transmission fluid level and condition.
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Inspect the transmission wiring harness for open wires or a disconnected connector.
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Measure solenoid resistance — an infinite reading confirms an open solenoid.
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Check the control wire for shorts to battery voltage.
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Replace the solenoid or repair the wiring based on test findings.
Frequently Asked Questions
How do I know if the TCC is stuck locked or unlocked?
Stuck locked: the car shudders or stalls when you brake to a stop. Stuck unlocked: the RPMs are high at highway speed and fuel economy is poor. Both are noticeable if you pay attention.
Is a stuck-locked TCC dangerous?
Yes. If the TCC can't release when braking, the car may stall suddenly. This is a safety issue. Get it repaired immediately.
What's the repair cost range for P2771?
Solenoid replacement runs $100–$300 including labor. If the valve body is damaged, repairs can reach $600–$1,200. Transmission reseals after pan removal add modest cost.