DTC P1121: Throttle Position (TP) Sensor Inconsistent with the Mass Air Flow (MAF) Sensor
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P1121 - THROTTLE POSITION (TP) SENSOR INCONSISTENT WITH MASS AIR FLOW (MAF) SENSOR
| Description: | The powertrain control module (PCM) monitors a vehicle operation rationality check by comparing sensed throttle position to mass airflow readings. If, during a key on engine running (KOER) self-test, the comparison of the TP sensor and MAF sensor readings are not consistent with the calibrated load values, the test fails and a DTC is stored in continuous memory. | ||
| Possible Causes: |
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| Diagnostic Aids: | Drive the vehicle and exercise the throttle and the TP sensor in all gears. A TP PID (TP V PID) less than 4.82% (0.24 volt) with a LOAD PID greater than 55%, or a TP PID (TP V PID) greater than 49.05% (2.44 volts) with a LOAD PID less than 30%, indicates a hard fault. | ||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| All | - | GO to DH: Throttle Position (TP) Sensor STEP DH16. | GO to DH: Throttle Position (TP) Sensor STEP DH16. |