726
UnclassifiedSpeed
What This Code Means
Malfunction Indicator Lamp (MIL) ON; Engine speed exceeds 2,250 rpm
Possible Causes
- •Engine speed exceeds 2,250 rpm for 2 or more seconds while engine is running
- •Faulty mechanical operation of the throttle
- •Incorrect calibration/incorrect service part number on ECM
- •Large manifold vacuum leaks
- •Other stored diagnostic trouble codes (DTCs)
Suggested Actions
- 1Check for other stored DTC codes before using the DTC chart for this code set
- 2Clear DTC information from the ECM using the Diagnostic Service Tool (DST)
- 3Correct mechanical operation of the throttle
- 4Diagnose and repair any existing codes starting with the lowest numerical code first
- 5Diagnose and repair other stored DTC codes first
- 6Find and correct the large manifold vacuum leak
- 7Perform On-Board Diagnostic (OBD) System Check
- 8Replace ECM with correct service part number
Related Power Solutions International, Inc. Fault Codes
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