EGR Temperature Sensor 2 - Abnormal Frequency
The EGR temperature sensor 2 is sending abnormal frequency signals to the engine control module.
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)
EGR (Exhaust Gas Recirculation) temperature sensor 2 monitors the temperature of exhaust gases going back into the intake. When it reports weird signals, the engine control module can't adjust the engine properly, affecting performance and emissions.
What the computer is actually seeing
The ECM expects a frequency signal within a specified range from the EGR temperature sensor 2. If the frequency falls outside this range, a fault is triggered.
What a healthy reading looks like
Frequency signal should be between 0.5 Hz to 5 Hz under normal conditions; anything outside this range will trigger the fault.
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 temperature sensor 2 for any visible damage or corrosion.
- 22. Using a multimeter, measure the voltage at the EGR temperature sensor connector. Expect between 0.5V to 4.5V depending on operating conditions.
- 33. If voltage is out of range, check the continuity of the wiring between the sensor and ECM.
- 44. If wiring is good and voltage is normal, replace the EGR temperature sensor 2.
- 55. If problem persists after replacement, check for ECM fault codes to see if there’s a software issue.
Common causes
- Wiring issues (broken or shorted wires)
- Faulty EGR temperature sensor 2
- ECM software issue
- Poor connections at the sensor or ECM
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's drivable but may affect emissions and performance. Fix sooner rather than later.
Will this code come back after I clear it?
It may return if the underlying issue isn't resolved, like a faulty sensor or wiring problem.
Why does it pair with other codes?
EGR systems are interconnected, and issues in one part can often show up as faults in related components.
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 →