P1121 - Throttle Position (TP) Sensor Inconsistent With The MAF Sensor
WARNING: This page does not describe the selected car, but rather 30 other vehicles, including the 2004 Mercury Sable, 2004 Mercury Mountaineer, 2004 Mercury Monterey, 2004 Mercury Marauder, and 2004 Mercury Grand Marquis. However, it is still accessible from the selected car via links, so may be relevant.
P1121 - THROTTLE POSITION (TP) SENSOR INCONSISTENT WITH THE MAF SENSOR
| Description: | The PCM monitors a vehicle operation rationality check by comparing sensed throttle position to mass air flow readings. If, during a 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 diagnostic trouble code is stored in continuous memory. | ||
| Possible Causes: |
|
||
| 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 16 | GO to DH: Throttle Position (TP) Sensor STEP 16 |