Exhaust Gas Temperature Sensor Circuit High Bank 1 Sensor 2
P2033 indicates the exhaust gas temperature (EGT) sensor circuit is reading abnormally high on bank 1, sensor 2. This sensor monitors exhaust temperatures to help the engine control module optimize fuel injection and emissions control. A high circuit reading typically means the sensor signal is too strong, suggesting either a sensor failure, wiring problem, or electrical short.
What You Might Notice
- Check engine light illuminated
- Possible rough idle or hesitation
- Potential increase in exhaust emissions
- Possible loss of fuel economy
- No immediately noticeable drivability issues in many cases
Most Common Causes
- 1
Loose or corroded connectors
Poor electrical connections at the EGT sensor connector or wiring terminals can cause high voltage readings and trigger the code.
- 2
Defective EGT sensor
The exhaust gas temperature sensor itself may have failed internally, causing it to send an incorrect high signal to the engine control module.
- 3
Damaged wiring or short to ground
Broken insulation, pinched wires, or exposed conductors in the sensor circuit can create shorts that produce high voltage readings.
- 4
Engine control module failure
Although uncommon, the ECM itself may have failed and be unable to correctly interpret the sensor signal.
How to Diagnose It
- 1
Check Loose or corroded connectors — Poor electrical connections at the EGT sensor connector or wiring terminals can cause high voltage readings and trigger the code.
- 2
Check Defective EGT sensor — The exhaust gas temperature sensor itself may have failed internally, causing it to send an incorrect high signal to the engine control module.
- 3
Check Damaged wiring or short to ground — Broken insulation, pinched wires, or exposed conductors in the sensor circuit can create shorts that produce high voltage readings.
- 4
Check Engine control module failure — Although uncommon, the ECM itself may have failed and be unable to correctly interpret the sensor signal.
How to Fix It
- 1
Inspect and clean connectors
Locate the EGT sensor connector on bank 1, sensor 2 and inspect for corrosion, looseness, or damage. Clean terminals with contact cleaner and reseat the connector firmly. Check all related wiring connections for the same issues.
- 2
Inspect wiring harness
Trace the EGT sensor wiring harness for signs of damage, cuts, abrasions, or exposed wires. Repair or replace any damaged sections of the wiring, ensuring proper insulation is restored.
- 3
Replace EGT sensor
If connectors and wiring are in good condition, the sensor itself is likely faulty. Remove the old sensor from the exhaust manifold or exhaust pipe and install a new OEM or quality replacement sensor.
- 4
Diagnose ECM control module
If all sensor and wiring repairs fail to resolve the code, have a professional diagnostic technician test the engine control module for faults using specialized equipment, as ECM replacement is rare but possible.
Need a deeper diagnosis?
Search for related repair guides or browse by system.