Diagnostic Trouble Code
P0700 — Transmission Control System Malfunction
Transmission Control System Malfunction
Definition
This is an informational code indicating that the Transmission Control Module (TCM) has detected a fault and stored its own diagnostic code. P0700 itself does not identify the specific transmission problem — a transmission-specific scan is required to read the TCM codes.
Common Causes
- Any transmission-related fault that triggers a TCM code
- Faulty shift solenoid
- Transmission fluid issues
- Internal transmission mechanical failure
- Wiring issue between ECM and TCM