Exhaust Gas Recirculation (EGR) Temperature Sensor Circuit
This code indicates a problem with the EGR temperature sensor circuit.
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)
The EGR temperature sensor measures the temperature of the exhaust gas that's being recycled back into the engine. If this sensor fails or has bad wiring, the computer won't be able to correctly control the EGR system.
What the computer is actually seeing
The engine control module (ECM) expects to see a voltage signal from the EGR temperature sensor between 0.5V (cold) and 4.5V (hot). If the signal drops below 0.2V or rises above 4.8V, it triggers this fault code.
What a healthy reading looks like
Normal EGR temperature sensor signal should range from 0.5V to 4.5V based on exhaust gas temperature, which typically runs from about 100°F (38°C) to 1000°F (538°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.
- 1Check the EGR temperature sensor wiring for damage or corrosion.
- 2Inspect the connector for bent pins or a loose fit.
- 3With the engine at operating temperature, verify the sensor voltage using a multimeter. It should be between 0.5V and 4.5V.
- 4If voltage is out of range, disconnect the EGR temperature sensor and check voltage at the connector. If normal here, replace the EGR temperature sensor.
- 5If voltage is still out of range, inspect the ECM and ground connections.
Common causes
- Faulty EGR temperature sensor
- Damaged wiring or connectors in the EGR circuit
- Faulty ECM
- Poor ground connections
Typical repair cost
$$ - $$$
Related codes
Frequently asked questions
Is it safe to drive with this code present?
It's manageable for a short distance, but you should fix it soon to avoid potential issues with emissions and engine performance.
Will this code come back after clearing?
If the underlying issue isn't fixed, the code is likely to reappear.
What other symptoms might I see?
You may notice reduced engine performance, unusual exhaust smells, or increased emissions.
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