C1370
Engine Or Transmission System Matching Error
C1370 is an OBD-II diagnostic trouble code meaning: Engine Or Transmission System Matching Error. Common causes: ecu/tcu firmware mismatch, problems with the wiring harness between modules. Estimated repair cost: $56–167.
Symptoms
- Incorrect operation of the gearbox
- Reduced engine power
- Jerks when shifting gears
- Check Engine Light Illuminates
Causes
- ECU/TCU firmware mismatch
- Problems with the wiring harness between modules
- Mechanical transmission problems
- Errors after replacing nodes without adaptation
- Damaged sensors (speed, throttle position)
How to Fix
- Read error codes from both modules (ECU and TCU)
- Check the integrity of the wiring harness between the blocks
- Compare current software versions with factory specifications
- Perform relearn procedure
- If necessary, update the firmware
- Carry out diagnostics of the mechanical part of the transmission
Related codes
FAQ
What does the C1370 code mean?
C1370 is an OBD-II diagnostic trouble code that indicates: Engine Or Transmission System Matching Error
What causes a C1370 error code?
The most common causes of C1370 include: ECU/TCU firmware mismatch; Problems with the wiring harness between modules; Mechanical transmission problems; Errors after replacing nodes without adaptation.
How do I fix a C1370 diagnostic trouble code?
To fix C1370: Read error codes from both modules (ECU and TCU). Check the integrity of the wiring harness between the blocks. Compare current software versions with factory specifications. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with C1370?
Limited driving only, diagnose soon
How much does it cost to fix C1370?
The estimated repair cost for C1370 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat