Generac Power Systems GP Series Diagnostic Repair Manual page 40

Section 5 Engine Diagnostic Tests
MIL Fault Circuit at Fault
Code Action
Temperatures and Pressures
6-1 Shutdown Engine Oil
Pressure
6-2 Warning Intake Manifold
Pressure
6-3 Warning Intake Manifold
Pressure
6-4 Warning Intake Manifold
Temperature
6-5 Warning Intake Manifold
Temperature
6-6 Shutdown Intake Manifold
Temperature
6-7 Warning Engine Head
Temperature
6-8 Warning Engine Head
Temperature
6-9 Shutdown Engine Head
Temperature
34
Fault Type
Low oil pressure or switch voltage not detected Check oil level
Sensor voltage (ECM-2C) above normal range
Sensor voltage (ECM-2C) below normal range
Sensor voltage (ECM-2G) above normal range,
sensor resistance high, or open circuit
Sensor voltage (ECM-2G) below normal range,
sensor resistance low, or shorted to ground
Temperature above normal operating range for
applied load
Sensor voltage (ECM-2K) above normal range;
sensor resistance high or open circuit
Sensor voltage (ECM-2K) below normal range;
sensor resistance low or shorted to ground
Temperature above rated operating range
Go To...
Check wiring harness and
connections to harness
Faulty sensor
Check intake manifold at cylinder
head and throttle body for leaks
Check wiring for shorts
Check TTMAP for obstructions
Check installation of TTMAP
Faulty TTMAP sensor
Check intake manifold at cylinder
head and throttle body for leaks
Check wiring for opens
Check TTMAP for obstructions
Check installation of TTMAP
Faulty TTMAP sensor
Check wiring for opens or shorts
Check TTMAP for obstructions
Check installation of TTMAP
Faulty TTMAP sensor
Check wiring connections
Check TTMAP for obstructions
Check installation of TTMAP
Faulty TTMAP sensor
Verify unit has appropriate ventilation
Check wiring for opens or shorts
Faulty sensor
Check wiring for opens or shorts
Faulty sensor
Check wiring for opens or shorts
Faulty sensor
Verify unit has appropriate ventilation
Check wiring for opens or shorts
Faulty sensor
Diagnostic Repair Manual