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P2035 GMC Code - Exhaust Gas Temperature Sensor Circuit Low Bank 2 Sensor 2

Quick Answer

The P2035 GMC code indicates a problem with the Exhaust Gas Temperature (EGT) sensor circuit in Bank 2 Sensor 2 of the vehicle. Common causes include Damaged Wiring: Corrosion, fraying, or breaks in the wiring harness connected to the EGT sensor can cause a circuit low error, Faulty EGT Sensor: The EGT sensor itself may be malfunctioning, providing incorrect readings to the ECM, ECM Issue: A problem with the engine control module (ECM) could prevent it from receiving accurate data from the EGT sensor. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means
P2035 GMC indicates Exhaust Gas Temperature Sensor Circuit Low Bank 2 Sensor 2.
Common causes
Common causes include Damaged Wiring: Corrosion, fraying, or breaks in the wiring harness connected to the EGT sensor can cause a circuit low error, Faulty EGT Sensor: The EGT sensor itself may be malfunctioning, providing incorrect readings to the ECM, ECM Issue: A problem with the engine control module (ECM) could prevent it from receiving accurate data from the EGT sensor.
Severity
Low - monitor the vehicle and repair when practical.
Can I drive?
The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
What is this?
Table of contents Created and updated by William Orellana on Sep 09, 2024
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Code P2035 GMC Description

The P2035 GMC code indicates a problem with the Exhaust Gas Temperature (EGT) sensor circuit in Bank 2 Sensor 2 of the vehicle. This sensor is responsible for monitoring the exhaust gas temperature after it has passed through the catalytic converter. The EGT sensor plays a crucial role in the engine management system, as it helps regulate exhaust gas recirculation, fuel injection timing, and turbocharger operation.

OBDII Code P2035 GMC - Exhaust Gas Temperature Sensor Circuit Low Bank 2 Sensor 2
P2035 GMC Code - Exhaust Gas Temperature Sensor Circuit Low Bank 2 Sensor 2

Common Causes of P2035 GMC

  1. Damaged Wiring: Corrosion, fraying, or breaks in the wiring harness connected to the EGT sensor can cause a circuit low error.
  2. Faulty EGT Sensor: The EGT sensor itself may be malfunctioning, providing incorrect readings to the ECM.
  3. ECM Issue: A problem with the engine control module (ECM) could prevent it from receiving accurate data from the EGT sensor.
  4. Poor Electrical Connection: Loose or poor connections between the EGT sensor and the ECM can cause circuit low errors.
  5. Exhaust Leaks: Leaks in the exhaust system near the EGT sensor can affect its readings and trigger the P2035 code.

Symptoms of P2035 GMC

  1. Check Engine Light: The most common symptom associated with the P2035 code is the illumination of the check engine light on the vehicle's dashboard.
  2. Decreased Fuel Efficiency: A malfunctioning EGT sensor can lead to improper fuel delivery, resulting in decreased fuel efficiency.
  3. Engine Misfires: The ECM relies on accurate EGT sensor data to adjust fuel delivery, so a faulty sensor can cause engine misfires or rough idling.
  4. Poor Engine Performance: The vehicle may experience a lack of power, hesitation, or sluggish acceleration due to incorrect EGT sensor readings.
  5. Increased Emissions: A malfunctioning EGT sensor can lead to increased emissions output from the vehicle, which may cause it to fail emissions tests.

How to Fix P2035 GMC

  1. Diagnose the Issue: Use a diagnostic scanner to read the fault codes and pinpoint the specific cause of the P2035 code.
  2. Inspect Wiring and Connections: Check the wiring harness for any damage, corrosion, or loose connections. Repair or replace as needed.
  3. Test EGT Sensor: Test the EGT sensor using a multimeter to determine if it is providing accurate readings. Replace the sensor if faulty.
  4. Clear Codes: Once the issue has been repaired, clear the fault codes from the ECM memory using a diagnostic scanner.
  5. Test Drive: Take the vehicle for a test drive to ensure that the check engine light does not reappear and that the engine is running smoothly.

Cost to Fix P2035 GMC

The typical repair costs for addressing the P2035 GMC code can vary depending on the specific cause of the issue. In general, replacing a faulty EGT sensor can cost between $100 and $300, while repairing damaged wiring or connectors may range from $50 to $150. If the issue is related to the ECM, the repair costs could be higher, potentially exceeding $500.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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