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Auxiliary Pressure Sensor Input 1 Circuit – Voltage Above Normal or Shorted to High Source
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Overview
| CODE | REASON | EFFECT |
| Fault Code: 297 PID: P443 SPN: 1388 FMI: 3 LAMP: Amber SRT: |
Auxiliary Pressure Sensor Input 1 Circuit – Voltage Above Normal or Shorted to High Source. High signal voltage detected at the OEM pressure circuit. |
None on performance. |
 Auxiliary Pressure Sensor Input 1 Circuit
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Circuit Description
The original equipment manufacturer (OEM) has the option of wiring a pressure sensor input to the Cummins electronic control module (ECM). A specific calibration is then created to recognize this pressure sensor input.
Component Location
The OEM pressure sensor input will vary depending on application. Refer to the OEM troubleshooting and repair manual for sensor location.
Shop Talk
Verify the electronic control module (ECM) calibration is correct. Check the calibration revision history found on QuickServe® Online for applicable fixes to the calibration stored in the ECM. If necessary, recalibrate the ECM. Refer to Procedure 019-032 (ECM Calibration Code) in Section 19 in the corresponding Troubleshooting and Repair Manual for the engine being serviced.
Possible causes of this fault code include:
- Open return circuit in the harness, connectors, or sensor
- Signal circuit shorted to sensor supply or battery voltage.
Refer to Troubleshooting Fault Code t05-297
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