49 Spark output signal default to 10 degrees or 1-2 shift error
How to read it
Code 49 reads as 4 flashes, pause, 9 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 49 mean?
49. Spark output signal default to 10 degrees or 1-2 shift error. This code sets when your vehicle computer detects spark output signal default to 10 degrees or 1-2 shift error.
Common causes of 49
- Open or shorted spark output circuit
- Faulty ignition control module
- Faulty transmission shift solenoid or internal transmission fault
- Low or dirty transmission fluid
- PCM spark or transmission control fault
How to fix 49
- Confirm the code and decide whether it points to ignition or transmission
- Inspect the spark output wiring and ignition module connector
- Check transmission fluid level and condition on shift-related faults
- Repair wiring or service the fluid before replacing parts
- Replace a failed part only after the circuit tests