EGR Temperature Sensor 1
Indicates a problem with the EGR temperature sensor's performance.
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 (Exhaust Gas Recirculation) temperature sensor measures the temp of exhaust gases going back into the engine. If it’s not working right, the computer can’t properly manage emissions, making the engine run inefficiently.
What the computer is actually seeing
The engine control module (ECM) looks for the EGR temperature sensor to read between 0.5V (cold) and 4.5V (hot). If it sees a voltage that’s way too low (like 0V for more than 5 seconds) or consistently out of range, it triggers this code.
What a healthy reading looks like
Normal voltage range for EGR temperature sensor: 0.5V to 4.5V; expected temperature range: 100°F to 400°F.
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 and connectors for damage or corrosion.
- 2Using a multimeter, check the voltage at the EGR temperature sensor connector while the engine is running. It should be between 0.5V and 4.5V.
- 3Check for any exhaust leaks near the EGR system.
- 4If voltage is out of range, replace the EGR temperature sensor and retest the system.
- 5If sensor voltage is normal but code persists, check the ECM for updates or faults.
Common causes
- Faulty EGR temperature sensor
- Wiring issues in the sensor circuit
- Corrosion or damage in connectors
- Exhaust leaks near the EGR system
- Faulty ECM or software issues
Typical repair cost
$$-$$$
Related codes
Frequently asked questions
Can I still drive the vehicle with this code?
Yes, but you may experience poor fuel economy and increased emissions. It's best to fix it soon.
Will this code come back after resetting?
If the underlying issue isn't fixed, yes, it will likely reappear.
Why does this code sometimes pair with others?
EGR system issues can often cause multiple sensor codes to trigger due to interconnected systems.
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