Engine Speed / Crankshaft Sensor - Data Valid But Above Normal Operating Range
The CAT-CID190-FMI0 (Caterpillar) diesel fault code means: Engine Speed / Crankshaft Sensor - Data Valid But Above Normal Operating Range. This is a serious severity code.
- Keep driving?
- No — stop driving
- DIY difficulty
- intermediate
- Estimated cost
- $300-$3000
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Common Symptoms
- Warning lamp
- Value above expected operating range
- Engine protect or derate
Probable Causes (Ranked by Likelihood)
- Actual measured value truly high from mechanical issue Very Likely
- Sensor reporting incorrect high reading Likely
- Overheat, overpressure, or overspeed condition Likely
Frequently Asked Questions
What does CAT code CID190-FMI0 mean?
CAT code CID190-FMI0 (Engine Speed / Crankshaft Sensor - Data Valid But Above Normal Operating Range) is a serious-severity fault on Caterpillar on-highway diesel engines. CID 190 is the Engine Speed / Crankshaft Sensor, measuring primary crank speed signal. FMI 0 (Data Valid But Above Normal Operating Range) indicates the specific fault mode. Use CAT ET to confirm before replacing parts. Diagnose with CAT ET (Electronic Technician) software.
Can I drive my truck with CAT code CID190-FMI0?
No. This fault can trigger engine protect mode, derate, or cause further damage. Park and diagnose before operating.
How much does it cost to fix CAT CID190-FMI0?
Typical repair is $300-$3000. Sensor / wiring fixes fall at the low end; injector, HEUI pump, turbo, or aftertreatment work falls at the high end. CAT dealer labor often requires CAT ET for calibration and parameter programming.
Mechanics Guide Step-by-step diagnosis
Step-by-Step Diagnostic Procedure
Confirm with CAT ET and compare to mechanical gauge reading on the affected system.
If the physical system is truly high, shut down and address root cause.
If physical reading is normal, inspect wiring for shorts to voltage and replace faulty sensor.
Sources 1
This page is built from documented references. Verify against your own service info before repair work.
- SAE J1939-73Application Layer: Diagnostics (defines the SPN/FMI fault-identifier framework)
Commonly Affected Vehicles
- Freightliner Classic XL with CAT C15
- Peterbilt 335 with CAT C7
- Peterbilt 386 with CAT C15
- Kenworth T800 with CAT C15
- Western Star 5900 with CAT C15
- Peterbilt 389 with CAT C15
- Peterbilt 387 with CAT C15
- Kenworth T470 with CAT C9
- Kenworth T800 with CAT C13
- Peterbilt 386 with CAT C13
- Thomas / Bluebird school bus with CAT C7
- Peterbilt 387 with CAT C13
- Peterbilt 340 with CAT C9
- Peterbilt 379 with CAT C15
- Kenworth T370 with CAT C7
- Kenworth T660 with CAT C13
- International 9400i with CAT C15
- Kenworth W900 with CAT C15
- Freightliner Columbia with CAT C13
- International 9200i with CAT C13
- International 4300 with CAT C7
- Western Star 4900 with CAT C15
- Freightliner M2 106 with CAT C7
- IC Bus shuttle with CAT C7
- International 9200i with CAT C15
- Kenworth T2000 with CAT C15
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