Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 2 Sensor 2
The exhaust gas temperature (EGT) sensor circuit on Bank 2 is not performing within expected parameters. This sensor monitors exhaust temperature to help the engine control module optimize fuel injection and emissions control, and a performance fault indicates the sensor signal is unreliable or out of range.
What You Might Notice
- Check engine light illuminated
- Reduced fuel economy
- Engine running rough or hesitating
- Possible loss of power during acceleration
- No immediately obvious drivability issues in some cases
Most Common Causes
- 1
Loose or corroded connectors
Corroded or loose terminals on the EGT sensor connector are the most common cause. Poor electrical connection prevents accurate signal transmission to the ECM.
- 2
Broken or shorted wiring
Damaged insulation on the sensor circuit wiring can create a short to ground or break the signal path. This prevents proper voltage signals from reaching the engine control module.
- 3
Failed EGT sensor
The EGT sensor itself may have failed electrically, producing an out-of-range signal or no signal at all to the ECM.
- 4
Incompatible aftermarket exhaust system
Installation of a catback exhaust system without EGT sensor provisions can displace or damage the sensor, breaking the circuit.
How to Diagnose It
- 1
Check Loose or corroded connectors — Corroded or loose terminals on the EGT sensor connector are the most common cause. Poor electrical connection prevents accurate signal transmission to the ECM.
- 2
Check Broken or shorted wiring — Damaged insulation on the sensor circuit wiring can create a short to ground or break the signal path. This prevents proper voltage signals from reaching the engine control module.
- 3
Check Failed EGT sensor — The EGT sensor itself may have failed electrically, producing an out-of-range signal or no signal at all to the ECM.
- 4
Check Incompatible aftermarket exhaust system — Installation of a catback exhaust system without EGT sensor provisions can displace or damage the sensor, breaking the circuit.
How to Fix It
- 1
Inspect and clean connectors
Locate the EGT sensor connector on Bank 2 and inspect for corrosion, loose pins, or debris. Clean contacts with electrical contact cleaner and ensure the connector is fully seated.
- 2
Check sensor wiring harness
Trace the EGT sensor wiring from the connector to the sensor and ECM. Look for broken insulation, damaged wires, or pinched harness sections. Repair or replace damaged wiring as needed.
- 3
Replace EGT sensor
If connectors and wiring are sound, the sensor has likely failed. Disconnect the faulty sensor and install a new OEM or quality aftermarket EGT sensor for Bank 2 Sensor 2.
- 4
Verify exhaust system compatibility
If an aftermarket exhaust system was recently installed, ensure it includes EGT sensor provisions and that the sensor is properly positioned in the exhaust stream.
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