DH12 - Continuous DTC 1121: TP Sensor and MAF Sensor Check
Continuous Memory DTC 1121 indicates the TP sensor is inconsistent with the MAF sensor.
Possible Causes:
- Damaged TP sensor.
- TP sensor not seated properly (almost completely detached from throttle body).
- Air leak between MAF sensor and throttle body.
- Attempt to start engine.
- Does the engine run?
YES -- Go to DH13. DH13 - Check Mechanical Operation of TP Sensor
NO -- CHECK for major leaks, cracks, and openings between MAF sensor and throttle body. If OK, Go to Pinpoint Test Step A1. A - No Start Test