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.
Medium severity. Can I keep driving?It depends on the symptoms. If the car is running normally you can go to a repair shop; if it goes into limp mode, drive as little as possible.
Symptoms
- Check engine light or transmission warning
- Transmission limp mode (fixed gear, harsh shifts)
- Implausible shifting
- Often no noticeable symptoms (sporadic false report)
Most likely causes
- Transmission module software (self-diagnosis triggers falsely)
- Voltage dip, poor ground or supply at the transmission module
- Interrupted or faulty programming
- Internal hardware defect (moisture, overheating)
What to check, in order
Start with the simplest. You can tick off each step.
Good to know
- Repair difficulty: medium
- It can trigger limp mode.
- It affects emissions.
What each character of P0613 means
- P: Powertrain: engine and transmission
- 0: Generic code: same on every make
- 6: Control modules and outputs
- 13: Specific fault in that system
Frequently asked questions
Can I keep driving with code P0613?
It depends on the symptoms. If the car is running normally you can go to a repair shop; if it goes into limp mode, drive as little as possible.
What causes code P0613?
The most common causes are: transmission module software (self-diagnosis triggers falsely); voltage dip, poor ground or supply at the transmission module; interrupted or faulty programming.
Related codes
- P0606Control Module Processor
- P0614ECM/TCM Incompatible
- P0631VIN Not Programmed or Incompatible TCM
- P0700Transmission Control System (MIL Request)
- P0601Internal Control Module Memory Checksum Error
Sources
Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.