4204
UnclassifiedLubrication
What This Code Means
No or low voltage measured at ignition coil on Wire 14E; Voltage isn't measured at splice 16, splice 15, COP/COR connector, and FB4; High resistance or INFINITY measured on Wires 451–454; Low resistance measured on Wires 451–454; No other issues found after other ignition coil wiring tests; Incorrect primary resistance on ignition coil; Incorrect secondary resistance on ignition coil
Possible Causes
- •FB4 has failed
- •IR Relay has failed
- •Wiring issue between ignition coil and ECM
- •Issue with ECM plug and pins
- •Faulty ECM
- •Faulty ignition coil
Suggested Actions
- 1Replace FB4
- 2Repair any wiring between FB4 and coil where necessary
- 3Refer to Test 130, IR Relay Test
- 4Repair wiring
- 5Inspect ECM plug and pins
- 6Replace the ECM
- 7Replace the faulty coil
Related Generac Fault Codes
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