Sonata V6-30L (1991) Oxygen Sensor Connector Guidelines
Oxygen Sensor: Technical Service Bulletins
Oxygen Sensor - Operation/Diagnosis
Group: ENGINE ELECTRICAL
Number: 93-36-013
Date: SEPTEMBER, 1993
Model: ALL
Subject:
OXYGEN SENSOR DIAGNOSTIC TROUBLE CODE 11
The Oxygen Sensor (02) measures the amount of oxygen in the exhaust gas and converts this quantity. into a voltage to be analyzed by the ECM. A
normal oxygen sensor signal will constantly fluctuate above and below 500 millivolts (mv) when the fuel injection system is in closed loop operation.
The air/fuel mixture is considered rich when the oxygen sensor signal is above 500 mv; the mixture is considered lean when the signal is below 500 mv.
An incorrect oxygen sensor signal can result in poor driveability and an oxygen sensor diagnostic trouble code being set When troubleshooting a vehicle
with an oxygen sensor code stored in the ECM, consider the possible causes listed below:
*
Air intake leak behind the air flow sensor. Ensure that the air flow sensor gasket is seated properly.
*
Throttle position sensor (TPS) out of adjustment.
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Oxygen sensor or harness wiring open or shorted to ground.
*
High resistance in the engine ground circuit or oxygen sensor ground circuit.
*
Clogged or leaky fuel injector(s).
*
Volume air flow sensor (VAFS) circuit failure.
*
Engine coolant temperature sensor circuit failure.
*
Incorrect fuel pressure.
*
Defective oxygen sensor.
*
Silicone contamination of the oxygen sensor caused by penetrating oils, silicone lubricants or sealers.
Consult the appropriate Shop Manual for detailed troubleshooting information on the above items.
