225 Knock not sensed during dynamic response test KOER
How to read it
Code 225 reads as 2 flashes, pause, 2 flashes, pause, 5 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 225 mean?
225. Knock not sensed during dynamic response test KOER. This code sets when your vehicle computer detects knock not sensed during dynamic response test koer.
Common causes of 225
- Faulty knock sensor
- Open or shorted wiring in the ignition circuit
- Corroded or loose connector at the knock sensor
- Faulty ignition control module or coil pack
- Faulty PCM ignition output
How to fix 225
- Confirm the code and read the flash sequence again
- Inspect the knock sensor and the ignition wiring for damage and corrosion
- Test the knock sensor signal while cranking or running
- Repair wiring or a connector before replacing parts
- Replace the knock sensor or ignition module only after the signal test fails