Sensor Supply 2 Circuit – Voltage Below Normal, or Shorted to Low Source
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Overview
CODE | REASON | EFFECT |
Fault Code: 187 PID: S232 SPN: 1080 FMI: 4/4 LAMP: Amber SRT: |
Sensor Supply 2 Circuit – Voltage Below Normal, or Shorted to Low Source. Low voltage detected at the sensor supply number 2 circuit. |
Marine: None, no engine protection for circuit or sensor failure. |
![]() Sensor Supply Number 2 Circuit
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Circuit Description
The sensor supply number 2 pin of the electronic control module (ECM)
provides +5 VDC for the intake manifold pressure sensor, and rail fuel pressure sensor.
Component Location
The sensor supply number 2 is located in the ECM.
Refer to Procedure 100-002 for a detailed component location view of each sensor.
Shop Talk
Low voltage on the +5-VDC supply line can be caused by a short circuit to ground in a supply line, a short circuit between a supply line or a return line, a failed sensor, or a failed ECM power supply.
Refer to Troubleshooting Fault Code t05-187