Exhaust Gas Recirculation (EGR) Temperature Sensor Circuit Low
EGR temperature sensor signal is below expected range.
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What it means (plain English)
The EGR temperature sensor measures how hot the exhaust gases are when flowing through the system. If the sensor reports a temperature too low, the engine control unit thinks something is wrong and triggers a code.
What the computer is actually seeing
The computer expects the EGR temperature to be between 150°F and 185°F (65°C - 85°C) while the engine is running. If it sees a voltage drop below about 0.5 volts, it sets this fault code.
What a healthy reading looks like
Normal EGR temperature should read between 150°F and 185°F under normal operating conditions.
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. Inspect EGR temperature sensor wiring and connectors for damage or corrosion. Repair or replace as needed.
- 22. Check EGR temperature sensor signal voltage with a multimeter. It should be in the range of 0.5 to 4.5 volts. If below 0.5 volts, replace the sensor.
- 33. Verify the EGR valve operation by checking for proper opening and closing functions; remove any blockages or replace if faulty.
- 44. Clear the code and road test to see if it returns. If the code comes back, further diagnostics of the EGR system may be necessary.
Common causes
- Faulty EGR temperature sensor
- Wiring issues (shorts or opens)
- Faulty EGR valve
- Contaminated EGR passages
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's moderate, so while the vehicle may still drive, you could experience reduced performance. It's best to fix it soon.
Will this code come back after clearing it?
If the issue is not resolved, the code is likely to return after clearing.
Why does this code sometimes pair with others?
Related faults in the EGR system can trigger multiple codes, especially if they affect the same circuit or function.
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