DTC P1921: Transmission Range Signal
WARNING: This page is about a different car, the 2006 Mercury Mariner and 2006 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
P1921 - TRANSMISSION RANGE SIGNAL
| Description: | The TCM continuously monitors the CAN network for a transmission range message from the PCM. This DTC is set when the received message does not match the actual transmission range. | ||
| Possible Causes: |
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| Diagnostic Aids: | Retrieve all continuous memory and on-demand self-test DTCs from the PCM. Repair any TR related DTCs first. | ||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| All | GO to Pinpoint Test TY . | - | GO to Pinpoint Test TY . |