Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 2 Sensor 1
The exhaust gas temperature (EGT) sensor on Bank 2 is not performing within expected parameters. This sensor monitors exhaust temperature to optimize engine combustion and emissions control, and a malfunction prevents the engine computer from properly regulating fuel and ignition timing.
What You Might Notice
- Check Engine Light illuminated
- Reduced fuel economy
- Rough idle or hesitation during acceleration
- Possible black smoke from exhaust
- Engine may run in limp mode
Most Common Causes
- 1
Loose or corroded connectors
Corroded terminals or loose wiring connections at the EGT sensor create poor electrical contact and signal transmission errors.
- 2
Faulty EGT sensor
The sensor has internally failed or degraded, preventing accurate exhaust temperature readings to the engine control module.
- 3
Broken or damaged wiring
Wiring harness damage, missing insulation, or shorts to ground in the sensor circuit prevent proper signal transmission.
- 4
Engine control module failure
The computer itself has failed or developed a fault in the EGT sensor circuit processing, though this is less common than sensor failure.
How to Diagnose It
- 1
Check Loose or corroded connectors — Corroded terminals or loose wiring connections at the EGT sensor create poor electrical contact and signal transmission errors.
- 2
Check Faulty EGT sensor — The sensor has internally failed or degraded, preventing accurate exhaust temperature readings to the engine control module.
- 3
Check Broken or damaged wiring — Wiring harness damage, missing insulation, or shorts to ground in the sensor circuit prevent proper signal transmission.
- 4
Check Engine control module failure — The computer itself has failed or developed a fault in the EGT sensor circuit processing, though this is less common than sensor failure.
How to Fix It
- 1
Inspect and clean connectors
Locate the EGT sensor connector on Bank 2 and examine for corrosion or loose terminals. Clean with electrical contact cleaner and reseat firmly, then clear the code and test.
- 2
Replace EGT sensor
Remove the faulty EGT sensor from the exhaust manifold on Bank 2 and install a new OEM or quality replacement sensor, ensuring proper torque specifications.
- 3
Repair or replace wiring harness
Inspect the entire wiring run from the sensor to the engine control module for breaks, corrosion, or shorts. Repair damaged insulation or replace the harness if severely compromised.
- 4
Test engine control module
If sensor and wiring are confirmed functional, have the engine control module tested by a professional diagnostic technician, as computer failure is possible though uncommon.
Need a deeper diagnosis?
Search for related repair guides or browse by system.