What are the common causes of P04CF?

An EGR temperature sensor C reading outside its range. A failed EGR temperature sensor C. Corroded EGR temperature sensor C wiring. A restricted EGR passage skewing the reading.

Read the EGR temperature sensor C on a scan tool. Compare the sensor C reading to the other EGR temperature sensors. Inspect the sensor C wiring and connector. Check the EGR passage for a restriction. Clear the code and retest.

P04CF

EGR Temperature Sensor C Circuit Range/Performance

System: Auxiliary emission controls (P code)
Lamp: Check Engine Light
Category: Powertrain - Auxiliary Emissions Controls

What it means

P04CF means EGR Temperature Sensor C Circuit Range/Performance.

Where it lives

For P04CF, the description names the sensor as the part involved.

Check these first

An EGR temperature sensor C reading outside its range
A failed EGR temperature sensor C
Corroded EGR temperature sensor C wiring
A restricted EGR passage skewing the reading

What to do next

Read the EGR temperature sensor C on a scan tool
Compare the sensor C reading to the other EGR temperature sensors
Inspect the sensor C wiring and connector
Check the EGR passage for a restriction
Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.