Exhaust Gas Temperature Sensor Circuit High Bank 2 Sensor 2
P2036 indicates the Exhaust Gas Temperature (EGT) sensor circuit for Bank 2, Sensor 2 is reading a voltage that is higher than the expected range. This sensor monitors exhaust gas temperature to help the engine control module optimize combustion and emissions control. A high circuit voltage typically means a wiring issue, sensor failure, or connector problem.
What You Might Notice
- Check engine light illuminated
- Engine running normally with no noticeable drivability issues
- Potential slight increase in exhaust emissions
- No immediate power loss or performance degradation
- Code stored in vehicle diagnostic memory
Most Common Causes
- 1
Loose or corroded connectors
Poor electrical connections at the EGT sensor or wiring harness connector are the most common cause. Corrosion or loose terminals prevent proper signal transmission and cause high voltage readings.
- 2
Broken or shorted wiring
Damaged insulation or broken wires in the sensor circuit can cause a short to ground or open circuit condition, resulting in abnormal voltage levels being detected by the ECM.
- 3
Failed EGT sensor
The exhaust gas temperature sensor itself may have failed internally, preventing accurate temperature signal transmission and causing the circuit voltage to read outside acceptable parameters.
- 4
ECM programming or hardware failure
Though uncommon, the engine control module may have a fault that causes it to misinterpret valid sensor signals or fail to properly communicate with the sensor circuit.
How to Diagnose It
- 1
Check Loose or corroded connectors — Poor electrical connections at the EGT sensor or wiring harness connector are the most common cause. Corrosion or loose terminals prevent proper signal transmission and cause high voltage readings.
- 2
Check Broken or shorted wiring — Damaged insulation or broken wires in the sensor circuit can cause a short to ground or open circuit condition, resulting in abnormal voltage levels being detected by the ECM.
- 3
Check Failed EGT sensor — The exhaust gas temperature sensor itself may have failed internally, preventing accurate temperature signal transmission and causing the circuit voltage to read outside acceptable parameters.
- 4
Check ECM programming or hardware failure — Though uncommon, the engine control module may have a fault that causes it to misinterpret valid sensor signals or fail to properly communicate with the sensor circuit.
How to Fix It
- 1
Inspect and clean electrical connectors
Disconnect the EGT sensor connector and inspect for corrosion, bent pins, or loose connections. Clean any corrosion with electrical contact cleaner and ensure all terminals are fully seated and secure.
- 2
Check wiring harness integrity
Visually inspect the sensor wiring from the connector to the ECM for cuts, abrasions, pinches, or exposed conductors. Look for signs of heat damage or rodent chewing. Repair or replace damaged sections as needed.
- 3
Replace EGT sensor
If connectors and wiring are intact, the sensor has likely failed and should be replaced. Remove the old sensor from the exhaust manifold or pipe and install a new OEM or quality aftermarket EGT sensor.
- 4
Diagnose ECM fault
If all sensors and wiring test normal, use advanced diagnostic equipment to test ECM functionality and reprogram if necessary. This may require professional dealer or specialist equipment.
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