EGR Cooler Temperature Sensor Low
EGR cooler temperature sensor voltage is below the expected range.
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 cooler temperature sensor measures the temperature of the exhaust gas going into the EGR cooler. If this sensor reports a low voltage, it usually means there's a problem with the sensor itself or its wiring.
What the computer is actually seeing
The engine's control module (ECM) reads a low voltage signal from the EGR cooler temperature sensor, indicating it may be under 0.5 volts, which is often outside the expected operating range of 0.5 to 4.5 volts.
What a healthy reading looks like
0.5 to 4.5 volts from the EGR cooler temperature sensor.
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 the wiring and connectors for the EGR cooler temperature sensor. Look for signs of damage, corrosion, or looseness. If found, repair or replace as needed. Decision: If wiring is good, proceed to step 2.
- 22. Using a multimeter, measure the voltage at the sensor connector with the engine running. Expected voltage should be between 0.5V and 4.5V. If outside this range, replace the sensor. Decision: If voltage is acceptable, proceed to step 3. If not, replace the sensor.
- 33. Check for any fault codes related to the EGR system in the ECM using a scan tool. Clear codes and take the vehicle for a test drive. Monitor for reoccurrence. Decision: If code returns, inspect the EGR cooler and related components for proper operation.
Common causes
- Faulty EGR cooler temperature sensor
- Wiring issue or short circuit in the sensor harness
- Poor connection at the sensor or ECM
- Coolant leaks affecting sensor performance
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Yes, but fix it soon. It can affect fuel economy and emissions.
Will this code keep coming back?
If the underlying issue isn't repaired, the code will likely reappear after some time.
Why does this appear alongside SPN 3316?
Both codes relate to the EGR system's temperature readings, indicating potential issues with the EGR cooler or its sensors.
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 →