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Exhaust Gas Pressure Sensor Number 1 Circuit – Data Erratic, Intermittent, or Incorrect.
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Overview
| CODE | REASON | EFFECT |
| Fault Code: 0003 PID: SPN: None FMI: LAMP: SRT: |
Exhaust Gas Pressure Sensor Number 1 Circuit – Data Erratic, Intermittent, or Incorrect. The exhaust gas treatment monitor unit has detected that the exhaust gas pressure sensor number 1 is not changing. |
None on performance. |
 Exhaust Gas Pressure Sensor Number 1 Circuit
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Circuit Description
The exhaust gas pressure sensor provides the exhaust gas pressure to the exhaust gas treatment monitor unit through the exhaust gas treatment monitor harness.
Component Location
The exhaust gas pressure sensor will be located near the inlet to the exhaust catalyst. The location will vary depending on application.
Shop Talk
This fault code is activated when the exhaust gas treatment monitor unit detects that the exhaust gas pressure signal value is not changing (ie, stuck in range). In order for this fault code to activate, the exhaust gas treatment monitor unit must detect that the exhaust gas pressure signal does not change during 30 minutes of engine operation where the exhaust gas temperature is above 250°C [482°F].
Possible causes of this fault code include:
- Faulty exhaust gas pressure sensor.
This fault code will only be present in the exhaust gas treatment monitor unit, and will not be present in the engine electronic control module (ECM). The exhaust gas treatment fault code and maintenance lamps will both flash three times in sequence to alert the operator that this condition exists. The engine diagnostic lamps will not illuminate.
Refer to Troubleshooting Fault Code t05-0003
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