Exhaust Gas Temperature Sensor Circuit Range/Performance Problem (Bank 1)
There’s a problem with the exhaust gas temperature sensor circuit on bank 1.
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 for bank 1 is either reading outside of expected limits or isn’t functioning properly, which can affect engine performance and emissions.
What the computer is actually seeing
The engine control module (ECM) receives a voltage signal from the exhaust gas temperature (EGT) sensor that should typically range between 0.2 to 4.5 volts. If the voltage is too high, too low, or inconsistent, the ECM sets a fault code.
What a healthy reading looks like
A properly functioning EGT sensor should output a voltage between 0.5V (cold) to 2.5V (normal range). Values above 2.5V may indicate a short in the circuit or sensor failure, while values below 0.5V may indicate an open circuit or sensor malfunction.
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.
- 1Inspect EGT sensor wiring and connectors for damage or corrosion. Repair as needed.
- 2Check for exhaust leaks near the sensor — fix any leaks before testing.
- 3Using a multimeter, check the voltage output of the EGT sensor at the connector. Expect between 0.5V to 2.5V under normal operating conditions. If out of range, suspect a bad sensor.
- 4If the sensor is functional but the code is still present, check the ECM for updates or reprogramming. Confirm there are no other fault codes present.
Common causes
- Faulty exhaust gas temperature sensor
- Wiring issues (shorts, breaks)
- Connector problems (corrosion, loose connection)
- Exhaust leaks affecting temperature readings
- ECM software issues
Typical repair cost
$$$
Related codes
Frequently asked questions
Can I drive with this code active?
Yes, but you may experience reduced performance and increased emissions. It's best to address it sooner rather than later.
Will this code come back after reset?
It might return if the underlying issue isn't fixed. Monitor the vehicle closely.
Why does this fault often pair with other EGT codes?
Multiple EGT codes may appear due to wiring issues or systemic problems affecting multiple sensors.
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