DerateCaterpillar Diesel ECM

03-0042-07

Name: ECM Performance
Address: Fort Lauderdale, FL, 33325, US
Telephone: (888) 768-2447
Price range: $$-$$$

Engine protection and emissions inducement power-limiting faults.

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Active derate — truck is losing power now

System

Caterpillar Derate

Caterpillar ECM Service

Diagnostic Overview

The entry 03-0042-07 appears to be a CAT-style diagnostic or flash-code formatted entry rather than a standard SPN/FMI pair. Because it is listed under derate, it should be treated as a possible engine protection or performance-limit condition until the full Cat ET description is confirmed. The code may point to a sensor, actuator, or system condition that causes the ECM to reduce available power. Do not use the number alone to order parts; verify the full code text first.

Likely Causes

Incomplete code format; flash-code translation issue; engine protection event; sensor fault; actuator fault; derate triggered by another active code.

What To Check First

Read the code in Cat ET, capture the full description and FMI/event text, check whether it is active, and review all other active derate or engine protection codes.

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Internal Linking

Related Derate Fault Codes

View All Derate Codes

0FD205798

The entry 0FD205798 does not look like a standard CAT SPN/FMI or event code.

SPN 358 FMI 4

CAT fault code 358-4 indicates that the ECM is seeing a low-voltage condition on the circuit associated with SPN 358.

E039 / EID 39

CAT event code E039 or EID39 is an engine protection event that may contribute to warning, derate, or shutdown depending on severity and calibration.

E041 / EID 41

CAT event code E041 or EID41 should be treated as a condition-based engine event that may be related to protection or derate logic.

E361

CAT event code E361 is commonly treated as an engine protection event that can produce warnings or derate depending on severity and the machine calibration.

E362

CAT event code E362 is another engine protection event that may be listed with derate complaints.

View All Derate Codes →