The Nissan transmission control module, or TCM, contains a microprocessor that computes signals being sent from the engine control unit/ECU, then actuates various switches and other components inside of the transmission. If it’s random operating memory/ROM has failed, then a P1703 OBDII trouble code will be set.
What Transmission Do I Have?
How Serious is the Code?
A Nissan P1703 diagnostic trouble code is pretty serious, because it means the computer/TCM in charge of activating all of the electronic components inside of your transmission has stopped working. This can lead to erratic transmission behavior, and even an inoperable transmission.
Symptoms
Symptoms of a P1703 include:
- Erratic shifting
- Failure to engage gears
Causes
- Faulty TCM
How to Diagnose the Code?
The process of diagnosing a P1703 OBD2 Nissan trouble code, involves connecting a scan tool to the vehicle’s OBDII port, then driving the vehicle and monitoring the data in accordance with the Nissan testing procedure.
What Repairs Will Fix P1703?
- Replace TCM
Related Codes
N/A
What Transmission Do I Have?
