Caterpillar Cat ET Error Code CID 178 FMI 0

Caterpillar Generator Major Engine

Model: Cat ET / EMCP 4.x | Code: 178-0

Applicable Systems
EMCP 4.2

Symptoms

CID 178 (Injection Control Pressure Sensor): Data valid but above normal operating range. The Caterpillar Electronic Technician (Cat ET) displays this fault. Machine operation may be derated or shut down depending on severity.

Possible Causes

  • Sensor or actuator for Injection Control Pressure Sensor failed or out of range
  • Wiring harness for CID 178 circuit open, shorted, or corroded
  • ECM parameter for Injection Control Pressure Sensor out of calibration
  • Mechanical or hydraulic issue affecting the component

Troubleshooting Steps

  1. Step 1: Connect Cat ET and read active fault codes for CID 178
    Fault code 178-0 displayed with timestamp and component data
  2. Step 2: Inspect wiring harness and connector for CID 178 (Injection Control Pressure Sensor)
    Wiring intact, connector clean and seated
  3. Step 3: Test Injection Control Pressure Sensor sensor or actuator output
    Output within Caterpillar specification range
  4. Step 4: Check ECM for stored parameters and calibrate if needed
    Parameters within factory specification
  5. Step 5: Clear fault with Cat ET and verify no re-occurrence
    Fault cleared and does not return after test cycle

How to Reset

To reset: 1) Correct the underlying fault for CID 178. 2) Press FAULT RESET on the EMCP panel or clear via Cat ET. 3) Verify machine returns to normal operation. Caution: Do not reset without repairing the fault as the machine may operate in derated mode.

Frequently Asked Questions

  • Q: What does CID 178 mean on Caterpillar equipment?

    CID 178 refers to Injection Control Pressure Sensor. It is a standard Caterpillar Component Identifier used in diagnostic systems.

  • Q: What does FMI 0 mean?

    FMI 0 indicates: Data valid but above normal operating range. FMI (Failure Mode Identifier) describes the type of failure detected.

Related Caterpillar Fault Codes

Comments (0)

Share your experience to help others facing the same problem.

No comments yet. Be the first to share your experience!

Leave a Comment

Source: Caterpillar SAE J1939 CID/FMI Reference, wholefleet.ca/motorsymphdiesel.com

Category: Generator