Exhaust Gas Temperature Sensor 2 (EGT2) Circuit High
This code indicates a high voltage detected from the exhaust gas temperature sensor 2.
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 exhaust gas temperature sensor 2 is saying it gets too much voltage, which means it might be shorted or getting wrong readings.
What the computer is actually seeing
The engine control unit (ECU) receives a voltage reading from the EGT2 sensor which is higher than the expected maximum, indicating a potential fault in the circuitry or sensor itself.
What a healthy reading looks like
A normal EGT2 reading is typically between 0.5V to 2.5V; anything above this could trigger a fault code.
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 EGT2 sensor; look for signs of damage or corrosion. Decision: If damaged, repair or replace wiring/connectors; if good, proceed to step 2.
- 22. Check the voltage output of the EGT2 sensor using a multimeter with the engine at operating temperature. Expected output should be between 0.5V - 2.5V. Decision: If the voltage is out of range, replace the EGT2 sensor; if in range, proceed to step 3.
- 33. Verify the continuity of the wiring between the EGT2 sensor and the ECU. Decision: If any breaks are found, repair; if continuity is good, suspect an ECU fault.
Common causes
- Shorted wiring in the EGT2 circuit
- Faulty exhaust gas temperature sensor 2
- Bad ECU connection or malfunction
- Corrosion in connectors or terminals
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's better to avoid driving the vehicle until it's checked, as it could lead to exhaust system issues.
Will this code come back after repair?
If the wiring and sensor are properly repaired, it shouldn't return unless there are underlying issues.
Why am I also seeing SPN 0426 with this code?
SPN 0426 is related to the same sensor circuit and can appear if there are similar faults.
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