Exhaust Gas Recirculation (EGR) Temperature Sensor Circuit Low
Indicates a low voltage reading from the EGR temperature sensor.
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 monitors the temperature of the exhaust gases that are being recirculated into the engine. If it's sending a low voltage signal, it could mean the sensor is faulty or the wiring to it has an issue.
What the computer is actually seeing
The Engine Control Module (ECM) expects to receive a voltage between 0.5V and 4.5V from the EGR temperature sensor under normal operating conditions. A reading below 0.5V is perceived as a fault and triggers this code.
What a healthy reading looks like
Normal sensor output voltage should be between 0.5V and 4.5V depending on temperature; consult manufacturer specs for specific values.
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 for any visible signs of damage in the wiring and connectors of the EGR temperature sensor. Ensure they are clean and secure. Is there any damage?
- 2Test the voltage at the EGR temperature sensor connector while the engine is running. What is the voltage reading?
- 3If the voltage is below 0.5V, replace the EGR temperature sensor. If the voltage is normal, check for continuity in the sensor wiring to the ECM. Is continuity good?
- 4If there is continuity, check the ECM for faults or software issues. If no issues are found, consider the possibility of exhaust leaks affecting sensor operation.
Common causes
- Faulty EGR temperature sensor
- Open or shorted wiring to the sensor
- Poor connector connection
- Exhaust leaks affecting temperature readings
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's drivable, but fix it soon to avoid possible performance issues and increased emissions.
Will the code come back after clearing it?
Yes, if the underlying issue isn’t resolved, the code will likely return.
Why does it seem to pair with SPN 1453?
Both codes are related to EGR temperature sensor issues; one may influence the other.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
Start guided diagnostic →