Exhaust Gas Temperature Sensor 2 - High
The exhaust gas temperature sensor 2 is reporting a high temperature.
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What it means (plain English)
The sensor that measures the temperature of the exhaust gas after it passes through the catalytic converter is reading a temperature higher than it should, typically over 1,200 degrees Fahrenheit.
What the computer is actually seeing
The vehicle's computer, typically the ECM, monitors the input from the exhaust gas temperature sensor (EGT) 2. It expects a temperature range of approximately 300 to 1,200 degrees Fahrenheit. If the input exceeds this range, especially surpassing 1,200°F, it triggers the SPN 3773 code.
What a healthy reading looks like
300°F to 1,200°F is normal; anything above 1,200°F may trigger the 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. Check for exhaust leaks around the EGT sensor 2 location. Repair any leaks found. Decision: If leak is found, repair and retest; if none, proceed.
- 22. Inspect the wiring and connectors at the EGT sensor 2 for damage, corrosion, or disconnections. Decision: Repair or replace damaged harness; if good, proceed.
- 33. Test the resistance of the EGT sensor 2. At room temperature, the resistance should be typically within 5-50 ohms. Decision: If out of range, replace sensor; if within range, proceed.
- 44. Use a scan tool to monitor the EGT sensor 2 readings during operation. Check if it exceeds 1,200°F under normal operating conditions. Decision: If it does, replace the sensor; if not, further diagnose the exhaust system.
Common causes
- Faulty exhaust gas temperature sensor 2
- Shorted wiring or connector issues
- Exhaust leaks causing incorrect readings
- Overheating exhaust system components
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Driving with a high EGT could lead to overheating and damage to the turbo or exhaust components, so it’s best to address it soon.
Will this code come back after repair?
If the system is properly repaired (wiring, connector, or sensor), the code shouldn't return.
Why do I see this code along with other EGT codes?
Multiple EGT codes can occur if there are common issues in the exhaust system or if multiple sensors are affected.
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