Honda Mower Error Code 4 Flash: How to Fix It

Q: Can I still use my Honda mower with a 4 flash error?

No, you should not continue using the mower when it shows a 4 flash error. This indicates a temperature sensor fault that could lead to engine overheating and serious internal damage if ignored.

Q: How much does a Honda mower temperature sensor cost?

Honda temperature sensors typically cost between $25-50 for the part. Labor costs at a repair shop can add another $50-100 if you choose professional installation.

Q: Will old oil cause a 4 flash error on Honda mowers?

Yes, old or degraded oil can cause temperature sensor errors because it doesn't transfer heat properly and can cause engine temperatures to rise above normal operating ranges.

Q: How often should I clean my Honda mower cooling fins?

Clean cooling fins after every 10-15 hours of use or monthly during heavy use periods. Grass clippings and debris buildup on cooling fins is a common cause of overheating issues.

Q: What does Honda i-GX 4 flash error mean exactly?

The Honda i-GX 4 flash error specifically indicates that the engine control unit has detected a fault with the coolant or oil temperature sensor circuit, either due to sensor failure or abnormal temperature readings.

Abstract

The Honda mower 4 flash error indicates a problem with the engine coolant or oil temperature sensor on i-GX engines. This fault can cause the engine to run poorly or shut down to prevent overheating damage. Most temperature sensor issues can be resolved with basic troubleshooting and sensor replacement.