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Heated Oxygen Sensor Circuit – Voltage Below Normal or Shorted to Low Source
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Overview
Heated Oxygen Sensor Circuit – Voltage Below Normal or Shorted to Low Source
| CODE | REASON | EFFECT |
| Fault Code: 464 PID: S065 SPN: 724 FMI: 4 LAMP: Warning SRT: |
Heated Oxygen Sensor Circuit – Voltage Below Normal or Shorted to Low Source. |
Possible reduced performance. Return to open loop running. |
 Heated Oxygen Sensor Circuit
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Circuit Description
The ECM uses this sensor to determine the amount of oxygen in the exhaust gas and then, to adjust the commanded air-fuel ratio.
Component Location
100-002 for the component location.
Shop Talk
The oxygen sensor heater must be functional for the sensor to work properly. It has a +12-VDC supply, which is separate from the engine control +24-VDC supply.
The engine will run in open-loop when the oxygen sensor fault is set. If rough running results, the display panel can be used to adjust the open-loop set points.
Refer to Troubleshooting Fault Code t05-464
Last Modified: 15-Jul-2010
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