SPACER-RUBBER 4993967 - Caterpillar

The Engine Control Module (ECM) detects the following conditions:
The signal voltage from the atmospheric pressure sensor is greater than 4.95 VDC for more than 30 seconds.
The ECM has been powered for at least two seconds.System Response:The ECM will log the diagnostic code and the ECM will trigger a snapshot. The check engine lamp will illuminate while this diagnostic code is active. The ECM will default to 100 kPa (15 psi) for atmospheric pressure.Possible Performance Effect:The engine power will be derated by 10 percent.Troubleshooting:Test Step 1. Perform the following diagnostic procedure: "Engine Pressure Sensor Open or Short Circuit - Test"Results:
OK - STOP