Exhaust Gas Temperature Out of Range Bank 1 Sensor 2
The exhaust gas temperature sensor for Bank 1 is reading outside the expected operating range, indicating the sensor may be failing or the exhaust system has an issue. This prevents the engine control unit from properly monitoring and adjusting fuel injection and ignition timing based on exhaust temperature.
What You Might Notice
- Check engine light illuminated
- Engine stalling or difficulty starting
- Engine overheating
- Poor fuel economy
- Reduced engine performance and acceleration
Most Common Causes
- 1
Defective Exhaust Gas Temperature Sensor
The EGT sensor may be failing internally or have lost calibration, causing it to send out-of-range voltage signals to the ECU. This is the most common cause of this code.
- 2
Excessive Exhaust Leak
A leak in the exhaust manifold or downstream piping allows unmetered air to enter the exhaust stream, cooling it below expected levels and confusing the temperature sensor.
- 3
Corroded or Damaged Wiring/Connector
Moisture and corrosion on the sensor connector or wiring harness can cause intermittent or false resistance readings that trigger the code.
- 4
Excessive Carbon Buildup on Sensor
Carbon deposits on the sensor element can insulate it from actual exhaust gas temperature, causing inaccurate readings.
How to Diagnose It
- 1
Check Defective Exhaust Gas Temperature Sensor — The EGT sensor may be failing internally or have lost calibration, causing it to send out-of-range voltage signals to the ECU. This is the most common cause of this code.
- 2
Check Excessive Exhaust Leak — A leak in the exhaust manifold or downstream piping allows unmetered air to enter the exhaust stream, cooling it below expected levels and confusing the temperature sensor.
- 3
Check Corroded or Damaged Wiring/Connector — Moisture and corrosion on the sensor connector or wiring harness can cause intermittent or false resistance readings that trigger the code.
- 4
Check Excessive Carbon Buildup on Sensor — Carbon deposits on the sensor element can insulate it from actual exhaust gas temperature, causing inaccurate readings.
How to Fix It
- 1
Replace Exhaust Gas Temperature Sensor
Remove and replace the Bank 1 EGT sensor with a new OEM or quality replacement. This addresses the most common failure point and should resolve the code in most cases.
- 2
Inspect and Repair Exhaust Leaks
Check the exhaust manifold, gaskets, and downstream pipes for cracks, holes, or loose connections. Repair or replace damaged components to restore proper exhaust flow and temperature.
- 3
Clean or Replace Sensor Connector and Wiring
Disconnect the sensor connector and inspect for corrosion or damage. Clean with electrical contact cleaner or replace corroded connectors and wiring as needed.
- 4
Check ECU and Fuses
Verify that all fuses related to the EGT circuit are intact and that the ECU is functioning properly. Replace any blown fuses or have the ECU tested if other fixes do not resolve the code.
Need a deeper diagnosis?
Search for related repair guides or browse by system.