P1792
ECM to TCM Engine Coolant Signal
P1792 is an OBD-II diagnostic trouble code meaning: ECM to TCM Engine Coolant Signal. Common causes: open or short circuit in signal transmission circuit, poor contact in the ecu or automatic transmission connectors. Estimated repair cost: $6–56.
Symptoms
- Automatic transmission goes into emergency mode
- Suboptimal gear shifting
- Check Engine light comes on
- Torque converter lockup problems
- Decreased fuel efficiency
Causes
- Open or short circuit in signal transmission circuit
- Poor contact in the ECU or automatic transmission connectors
- Engine ECU malfunction
- Malfunction of the automatic transmission control unit
- Problems with wiring between units
How to Fix
- Check the integrity of the wiring between the ECU and automatic transmission
- Inspect and clean the contacts in the connectors
- Check the presence of a coolant temperature signal at the ECU output
- Check signal reception on the automatic transmission side
- If necessary, replace damaged wires or connectors
Related codes
Error P1792 by Vehicle Brand
FAQ
What does the P1792 code mean?
P1792 is an OBD-II diagnostic trouble code that indicates: ECM to TCM Engine Coolant Signal
What causes a P1792 error code?
The most common causes of P1792 include: Open or short circuit in signal transmission circuit; Poor contact in the ECU or automatic transmission connectors; Engine ECU malfunction; Malfunction of the automatic transmission control unit.
How do I fix a P1792 diagnostic trouble code?
To fix P1792: Check the integrity of the wiring between the ECU and automatic transmission. Inspect and clean the contacts in the connectors. Check the presence of a coolant temperature signal at the ECU output. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1792?
Yes, but get it checked soon
How much does it cost to fix P1792?
The estimated repair cost for P1792 is $6–56. Actual cost depends on your vehicle, location, and labor rates.
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