Applicable Systems
OBD-II
Symptoms
The transmission gear ratio does not match the expected value for the selected gear. Transmission performance may be affected.
Possible Causes
- Internal transmission clutch or band slippage
- Shift solenoid not engaging the correct gear
- Speed sensor input incorrect
Troubleshooting Steps
- Step 1: Compare input and output speed sensor readings for the gear
Ratio does not match expected value - Step 2: Test shift solenoid operation for the affected gear
Solenoid operating correctly - Step 3: Inspect internal transmission components if electrical tests pass
Internal fault identified
How to Reset
To reset: Clear the DTC after correcting the gear ratio issue.
Source: SAE J2012 OBD-II Diagnostic Trouble Codes, SAE International
Category: OBD-II