P0613 TCM Processor

P0613 indicates a TCM processor fault. The transmission control module has detected an internal processing or self-test problem that can affect shift control.

Code details

Generic OBD-II · P0

System: Computer
Code type: Generic (SAE / ISO controlled)
Standard: SAE J2012 / ISO 15031-6

Diagnostic boundary

A diagnostic trouble code reports that a monitored test failed. It does not prove one specific part is bad, and manufacturer logic can add vehicle-specific conditions.

Do not replace transmission solenoids or the TCM until module power, ground, network, and software conditions are checked.

Symptoms of P0613

Check-engine light, sometimes with several unrelated codes at once.
Warning lights, a no-start, or intermittent electrical faults.
Communication or module-reset problems on a scan tool.

Common causes of P0613

Low battery voltage, poor grounds, corroded connectors, or blown fuses.
Wiring or network (CAN bus) faults between modules.
A module software/programming issue, or rarely a failed controller.

Useful checks before replacing parts

Check TCM power feeds, grounds, battery voltage, charging stability, communication status, freeze-frame data, and whether the code resets immediately.
Inspect TCM connectors for water intrusion, corrosion, loose terminals, harness damage, aftermarket wiring, and recent programming or replacement history.
Verify voltage, grounds, network health, and calibration before replacing or programming the transmission control module.

Related OBD-II codes

These nearby computer entries can help compare wording and pin down the fault area.