P0613TCM Processor
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P0613 reports an internal processor or calculation fault in the transmission control module. It is usually set by the transmission module itself – the scan tool shows which module stored it; on some architectures the engine module reports it on the transmission module's behalf. The only manufacturer document found is Subaru's bulletin for the 2022 BRZ 2.4 L automatic: an internal plausibility check (a calculated gear ratio) set P0613 falsely in rare cases, and the fix was reprogramming the transmission module with improved self-diagnosis. Depending on the maker the transmission may go into limp mode with a fixed gear and harsh shifts. Check supply, ground and battery first, then look for a software update. The engine module's processor fault is P0606; an ECM/TCM mismatch is P0614.
- What you may notice
- Check engine light or transmission warning
- Transmission limp mode (fixed gear, harsh shifts)
- Implausible shifting
- Often no noticeable symptoms (sporadic false report)
- Likely causes
- LikelyTransmission module software (self-diagnosis triggers falsely)
- PossibleVoltage dip, poor ground or supply at the transmission module
- PossibleInterrupted or faulty programming
- RareInternal hardware defect (moisture, overheating)
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €100 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.