670 Transmission range sensor voltage high or low
How to read it
Code 670 reads as 6 flashes, pause, 7 flashes, pause, 0 flashes on the check-engine light. Jumper the self-test input to signal return at the test connector, then run the key on engine off self test and the running self test, counting the check-engine flashes each time.
New to flash codes? The OBD-I code reading guide walks through the paperclip method, code 12, and reading two-digit codes.
What does Ford code 670 mean?
670. Transmission range sensor voltage high or low. This code sets when your vehicle computer detects transmission range sensor voltage high or low.
Common causes of 670
- Faulty transmission range sensor
- Open or shorted wiring in the transmission range sensor circuit
- Corroded or loose connector at the transmission range sensor
- Low or dirty transmission fluid
- Faulty PCM transmission control
How to fix 670
- Confirm the code and check the transmission fluid level and condition
- Inspect the transmission range sensor and its wiring for damage and corrosion
- Test the transmission range sensor circuit
- Service the fluid before condemning internal parts
- Replace a failed part only after the circuit test fails