53 Caterpillar Fault Codes
Caterpillar ECM Fault Codes
Caterpillar (CAT) diesel ECM fault codes across aftertreatment, EGR, turbo, and derate systems.
Aftertreatment24 codes
Caterpillar Aftertreatment
DPF, DEF, SCR, and NOx-reduction system faults.
EGR9 codes
Caterpillar EGR
Exhaust gas recirculation valve, cooler, and flow faults.
Turbo12 codes
Caterpillar Turbo
Turbocharger boost control and air-handling faults.
Derate8 codes
Caterpillar Derate
Engine protection and emissions inducement power-limiting faults.
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