P0801
PowertrainTransmissionmoderate severityReverse Inhibit Control Circuit
What P0801 Means
A fault has been detected in the reverse inhibit control circuit, which prevents accidental engagement of reverse gear. This can affect the ability to select or lock out reverse.
Symptoms
- Difficulty engaging reverse
- Check engine light on
- Reverse lockout not functioning
Common Causes
- Faulty reverse inhibit solenoid
- Open or short in control circuit wiring
- Damaged connector at transmission
- Faulty transmission control module
Diagnostic Steps
- Scan and record freeze frame data
- Inspect reverse inhibit circuit wiring and connectors
- Test solenoid resistance against spec
- Check TCM output command and power supply
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ANCEL AD410 →
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✓ Autel official store
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