FMI 2 - Data Validity - Above Normal
Sensor input is reading higher than expected limits.
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What it means (plain English)
The engine computer sees a sensor value that’s too high to be normal, which could mean a faulty sensor or wiring issue.
What the computer is actually seeing
The computer reads an input voltage from a sensor that exceeds the normal operating range, such as 5V, indicating a problem with the circuit.
What a healthy reading looks like
Expected normal range is typically between 0.5V and 4.5V; anything above 4.5V is flagged as too high.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 11. Inspect the wiring and connectors for damage or corrosion. If damaged, repair or replace the wiring.
- 22. Check the sensor for shorts using a multimeter; it should not have continuity with the power supply when disconnected. If it does, replace the sensor.
- 33. Measure the voltage output of the sensor while the engine runs. If it exceeds the expected range (0.5V - 4.5V), replace the sensor.
- 44. Inspect and clean any ground connections related to the sensor circuit. A poor ground can raise voltage readings.
- 55. If all components check out and the issue persists, consider checking for interference from other electronic devices that may introduce erratic readings.
Common causes
- Faulty sensor
- Wiring harness short to positive
- Poor ground connection
- Corrosion at connectors
- Fluid contamination affecting sensor reading
Typical repair cost
$$
Related codes
Frequently asked questions
Can I drive with this code active?
It is not recommended as it can lead to further engine issues or performance problems.
Will this code come back after clearing it?
If the underlying issue is not fixed, the code will likely return.
Why does this code show up with other related codes?
Related codes often signify a broader issue with the same sensor or circuit, so multiple codes may indicate a shared source of the problem.
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