EGT Sensor 2 Circuit Low
This code indicates a low voltage condition in the EGT sensor 2 circuit.
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 computer is seeing a low voltage signal from the EGT sensor 2, meaning it thinks that sensor isn't working properly or there's a wiring issue.
What the computer is actually seeing
The engine control unit (ECU) expects a voltage signal from the EGT sensor typically between 0.5 to 4.5 volts under normal operation. If it sees a voltage drop below 0.2 volts, it triggers this code.
What a healthy reading looks like
Normal EGT sensor output should be between 0.5 to 4.5 volts depending on temperature; above 400°F (204°C) should be closer to 1.0-2.5 volts.
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. Check the EGT sensor 2 wiring for visible damage (fraying, cuts).
- 2- If damaged, repair wiring; clear codes and retest. If not, proceed to step 2.
- 32. Inspect the electrical connector at the EGT sensor for corrosion or loose connections.
- 4- Clean or repair the connector as needed; clear codes and retest. If the problem persists, proceed to step 3.
- 53. Use a multimeter to check the voltage at the EGT sensor 2 while the engine is running.
- 6- If voltage is below 0.5 volts, replace the EGT sensor; otherwise, check the wiring back to the ECU.
- 74. If the sensor is replaced, monitor for any return of the code.
Common causes
- Faulty EGT sensor 2
- Wiring issues in the EGT circuit
- Bad connector at the EGT sensor
- Corrosion or short in the wiring harness
- ECU software issue
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's moderate severity; you can drive but should address it soon to prevent possible engine issues.
Will this code come back after erasing it?
It may come back if the underlying issue isn't resolved, especially if the sensor or wiring is faulty.
Why does this code pair with other SPN codes?
Multiple SPN codes can occur if there's a common fault in the sensor circuit or related components.
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