What is CAT Code 376-5 & How to Solve It?

What is CAT Code 376-5:

CAT Code 376-5 relates to the Fuel Shutoff Valve, indicating an electrical fault or open circuit in the control signal.

This can cause the engine to fail to start or shut off abruptly during operation.

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Why This Happens

• Open circuit or poor connection in shutoff valve wiring.
• Solenoid coil failure inside the valve.
• ECM not supplying control signal.
• Faulty relay or fuse in shutoff circuit.

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How to Fix It

1. Inspect wiring to the fuel shutoff solenoid.
2. Test voltage and continuity to the solenoid.
3. Replace solenoid if open or internally shorted.
4. Check for blown fuse or faulty relay.
5. Clear the code and confirm proper engine start and stop.

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How to Avoid It Before It Happens

1. Replace shutoff valves as part of fuel system maintenance.
2. Inspect wiring regularly for abrasion and corrosion.
3. Test control voltage periodically.

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