Exhaust Gas Temperature Sensor 2 Circuit Range/Performance Problem
There's an issue with the exhaust gas temperature sensor 2 performance.
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 helps monitor how hot exhaust gases are. If it reads too low or too high, the engine control module (ECM) gets confused about how to manage the engine and emissions system properly.
What the computer is actually seeing
The ECM sees readings from the exhaust gas temperature sensor 2 that fall outside of the expected range during specific operating conditions, often showing high resistance or out-of-spec voltage levels.
What a healthy reading looks like
Normal operation voltage for the sensor should be around 0.5 to 4.5 volts depending on the temperature, which should be within 300°F to 1800°F for operation.
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 connector for the exhaust gas temperature sensor 2 for any damage or corrosion. If damaged, repair or replace as necessary. Decision: If wiring is okay, move to step 2; if damage is found, fix it and retest.
- 22. Measure the voltage at the exhaust gas temperature sensor 2 while the engine is running. Voltage should be between 0.5 and 4.5 volts based on temperature. Decision: If voltage is out of range, suspect a bad sensor; if in range, move to step 3.
- 33. Check the exhaust gas temperature sensor itself using an ohmmeter for resistance specifications since it should change according to exhaust temperature. Decision: If resistance is out of expected range, replace the sensor; if within range, check ECM functionality.
Common causes
- Wiring issues such as shorts or open circuits
- Faulty exhaust gas temperature sensor 2
- Poor connection at the sensor or ECM
- Malfunctioning exhaust system components
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with code P246A?
It's moderate severity, so it’s okay to drive but address it soon to avoid possible further issues with emissions or fuel economy.
Will the code P246A come back after clearing?
Yes, if the underlying issue isn't repaired, the code may reappear after clearing the DTC.
Why is this code showing along with P246B?
Both pertain to exhaust gas temperature sensors, indicating possible multiple sensor performance issues or wiring problems.
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