Vehicle Speed Sensor MTR
Table of contents
P1721 INFINITI Possible Causes
- Faulty Vehicle Speed Sensor
- Vehicle Speed Sensor harness is open or shorted
- Vehicle Speed Sensor circuit poor electrical connection
- Transmission Control Module (TCM) communication
How do I fix code P1721 INFINITI?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Cost of diagnosing the P1721 INFINITI code
The cost of diagnosing the P1721 INFINITI code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
When is the code detected
TCM does not receive the proper vehicle speed sensor MTR signal (input by CAN communication) from combination meter.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P1721 INFINITI Description
The vehicle speed sensor·MTR signal is transmitted from combination meter to Transmission Control Module (TCM) by CAN communication line. The signal functions as an auxiliary device to the revolution sensor when it is malfunctioning. The TCM will then use the vehicle speed sensor·MTR signal.