Heated Exhaust Gas Oxygen Sensor (Hego) - Kohler KG2204 Service

5.7. Heated Exhaust Gas Oxygen
Sensor (HEGO)
Figure 5-8 HEGO Sensor
WARNING
Hot parts can cause severe burns.
Do not touch engine while operating or just after
stopping.
Never operate engine with heat shields or guards
removed.
TP-6903 5/16a
5.7.1. Removal Procedure
Make sure that the engine is off.
If the engine is used as part of a generator set,
disconnect AC power to the generator set by
opening the upstream circuit breaker.
Disconnect the engine starting battery, negative
(-) lead first.
Shut off the fuel supply.
Wait for the exhaust to cool.
Locate the HEGO sensor.
Disconnect the HEGO sensor wire harness.
Using a HEGO sensor socket, remove the HEGO
sensor.
5.7.2. Installation Procedure
Important: Silicone sprays or inappropriate RTV
(room temperature
contaminate the HEGO sensor. Contaminated HEGO
sensors can produce false or high readings resulting in
poor fuel mixtures and severe performance problems.
Always verify that the sealer is safe to use with the
HEGO sensor before using.
Before installing the HEGO sensor, lubricate the
threads with an appropriate anti-seize compound.
Avoid contaminating the sensor tip with the
compound.
Install the HEGO sensor and torque to 41 Nm
(30 ft. lb.).
Reconnect the wire harness connection to the
HEGO sensor.
Reconnect the battery.
If the engine is used as part of a generator set,
re-apply the AC power supply to the generator set
by closing the upstream circuit breaker.
Turn on the fuel supply.
Start and run the engine until normal operating
temperature is reached.
Turn off the engine.
Check for any DTCs and troubleshoot. Refer to
Section 2, Diagnostic Troubleshooting Codes
for further diagnosis.
Installation and Removal Procedures
vulcanization) sealers can
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