EGR Cooling Temperature High
The Engine Control Module (ECM) has detected a high temperature from the EGR cooler.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
Your engine is overheating due to a problem with the Exhaust Gas Recirculation (EGR) cooler. This can cause the engine to run inefficiently or even lead to damage if not fixed.
What the computer is actually seeing
The ECM monitors the EGR cooler outlet temperature sensor. It expects the temperature to be below a set threshold (typically around 200°F or 93°C). When the ECM sees repeated high readings over this threshold, it logs this fault code.
What a healthy reading looks like
Expected EGR cooler outlet temperatures are generally around 140°F to 180°F (60°C to 82°C).
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 11. Check the wiring and connectors to the EGR cooler temperature sensor for damage or corrosion. Repair if necessary. Decision Point: Are all connections secure and undamaged? If Yes, proceed. If No, fix it.
- 22. Inspect the EGR cooler for leaks or signs of damage. Decision Point: Is the EGR cooler intact without leaks? If Yes, proceed. If No, replace the EGR cooler.
- 33. Test the EGR cooler temperature sensor with a multimeter. Expected resistance should be within manufacturer specs (typically around 2.5 kΩ at 70°F). Decision Point: Is the sensor within specs? If Yes, proceed. If No, replace the sensor.
- 44. Check the engine coolant temperature; ensure it's functioning within normal limits (190°F-220°F or 88°C-104°C). Decision Point: Is the engine coolant temperature normal? If Yes, the issue lies elsewhere. If No, investigate coolant system circulation.
Common causes
- Faulty EGR cooler temperature sensor
- Coolant flow restriction in the EGR cooler
- Failed EGR cooler
- Coolant leaks affecting temperature readings
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code active?
It's not advised to drive for long periods as overheating can cause serious engine damage.
Will the code come back after clearing?
If the underlying issue isn't fixed, yes, the code will likely return.
Why does this code sometimes pair with SPN 4007?
SPN 4007 indicates a similar issue but with the EGR cooler temperature sensor itself. They often occur together when the EGR cooler is experiencing problems.
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