P0782: Transmission shift 2–3 malfunction — what it means, the affected system and what to check before replacing parts.
Meaning, symptoms, causes and checks
The controller reports a problem completing the 2–3 gear transition. This concerns shift execution rather than necessarily a defective shift switch or one named solenoid. The commanded transition and the achieved ratio must be distinguished.
Affected system: Transmission shift execution
Symptoms
- Warning light may illuminate
- Related system function may be impaired
- Vehicle-specific symptoms vary
Possible causes
- Transmission fluid, hydraulic, solenoid, connector, or control-circuit issue
- Related wiring, connector, power or ground fault
- Vehicle-specific mechanical or control issue
What to check
- Record stored and pending codes and freeze-frame data
- Compare commanded and actual transmission data, inspect fluid condition and level according to the vehicle procedure, then test the relevant circuit and solenoid.
- Confirm measured values against the vehicle service information
- Retest under the conditions that set the code
- Compare commanded and actual transmission data, inspect fluid condition and level according to the vehicle procedure, then test the relevant circuit and solenoid.
- Repair the verified cause and confirm the code does not return
Also written as: P0782-00, P078200, PO782 (some scan tools add the fault-type byte, e.g. -00).