P0700 – Transmission Control System Malfunction
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Symptoms
- Harsh shifting
- Poor acceleration
- Limp mode
- Rough idle
- Check engine light
Causes
- Faulty TCM
- Damaged wiring
- Low transmission fluid
- Sensor issue
- ECU issue
Diagnosis
- Scan transmission codes
- Inspect wiring
- Check fluid level
- Test sensors
- Inspect connectors
Repair
- Replace TCM
- Repair wiring
- Refill fluid
- Replace sensors
- Update ECU