98 Hard fault present during self test
How to read it
Code 98 reads as 9 flashes, pause, 8 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 98 mean?
98. Hard fault present during self test. This code sets when your vehicle computer detects hard fault present during self test.
Common causes of 98
- A fault is present right now during the test
- A component failed with the fault stored as a hard code
- Open or shorted circuit causing a continuous fault
- Failed sensor or actuator holding the fault
- Fault stored after a component failure
How to fix 98
- Confirm the code and read all codes that follow it in the sequence
- Diagnose the companion fault codes first since 98 is a status code
- Inspect the circuits named by the other codes for opens and shorts
- Repair the fault and clear the codes
- Retest to confirm no hard fault remains