Check High Speed Circuit

The microprocessor detected a failure in the circuit that activates engine high speed.

Possible causes

Defective speed solenoid
Failed high speed relay
Obstructed throttle mechanical linkage
Wiring failure between controller and solenoid

Recommended actions

Test speed solenoid with external power
Clean and lubricate throttle linkage
Check high speed relay on the board
Inspect control fuses

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