148
UnclassifiedFuel
What This Code Means
Fuel run-out longer than expected; Engine does not stop after turning off natural gas manual valve; Engine continues to run for more than 10 seconds after the key is turned off; Malfunction Indicator Lamp (MIL) ON; Engine does not stop after natural gas manual valve is turned off; Natural gas lockoff solenoid voltage does not immediately turn off when key is turned off
Possible Causes
- •Faulty natural gas lockoff solenoid
- •Natural gas solenoid control short to ground
- •Damaged, corroded, or contaminated ECM wire harness or connector
- •Faulty ECM
- •Intermittent electrical problem
- •Problem with the electric fuel shut-off valve
- •Wiring issue
Suggested Actions
- 1Perform On-Board (OBD) Sys-Check
- 2Disconnect natural gas lockoff solenoid connector and check for power across terminals A and B while cranking
- 3Turn off natural gas manual valve, start engine, and let idle until it stops to verify if engine stops
- 4Replace the natural gas lockoff solenoid
- 5Check for continuity between ECM wire harness header connector pin 33 and engine ground
- 6Repair the natural gas solenoid control short to ground
- 7Inspect and repair the ECM wire harness and connector for damage, corrosion, or contamination
- 8Replace the ECM
- 9Correct ECM wire harness and connector damage, corrosion, or contamination
- 10Refer to intermittent problems in the electrical section of the manual
Related Power Solutions International Fault Codes
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