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P2033 Mercury Code - Exhaust Gas Temperature Sensor Circuit High Bank 1 Sensor 2

Quick Answer

The P2033 diagnostic trouble code (DTC) for Mercury vehicles specifically refers to a problem with the Exhaust Gas Temperature (EGT) Sensor Circuit High for Bank 1 Sensor 2. Common causes include Faulty EGT Sensor: The EGT sensor itself may be malfunctioning, sending incorrect high voltage signals to the ECM, Wiring Issues: Damaged or corroded wiring connected to the EGT sensor can cause circuit high readings, Exhaust Leaks: Leaks in the exhaust system can lead to false high temperature readings by 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
P2033 Mercury indicates Exhaust Gas Temperature Sensor Circuit High Bank 1 Sensor 2.
Common causes
Common causes include Faulty EGT Sensor: The EGT sensor itself may be malfunctioning, sending incorrect high voltage signals to the ECM, Wiring Issues: Damaged or corroded wiring connected to the EGT sensor can cause circuit high readings, Exhaust Leaks: Leaks in the exhaust system can lead to false high temperature readings by 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 P2033 Mercury Description

The P2033 diagnostic trouble code (DTC) for Mercury vehicles specifically refers to a problem with the Exhaust Gas Temperature (EGT) Sensor Circuit High for Bank 1 Sensor 2. This sensor is responsible for monitoring the exhaust gas temperature after it has passed through the catalytic converter. The EGT sensor helps the engine control module (ECM) to adjust the air-fuel mixture and optimize the combustion process. When this sensor detects a high voltage signal, indicating that the exhaust gas temperature is too high, it triggers the P2033 code.

OBDII Code P2033 Mercury - Exhaust Gas Temperature Sensor Circuit High Bank 1 Sensor 2
P2033 Mercury Code - Exhaust Gas Temperature Sensor Circuit High Bank 1 Sensor 2

Common Causes of P2033 Mercury

  1. Faulty EGT Sensor: The EGT sensor itself may be malfunctioning, sending incorrect high voltage signals to the ECM.
  2. Wiring Issues: Damaged or corroded wiring connected to the EGT sensor can cause circuit high readings.
  3. Exhaust Leaks: Leaks in the exhaust system can lead to false high temperature readings by the EGT sensor.
  4. Malfunctioning ECM: A faulty engine control module can misinterpret sensor data and trigger the P2033 code.

Symptoms of P2033 Mercury

  1. Check Engine Light: The most common symptom associated with the P2033 code is the illumination of the check engine light on the dashboard.
  2. Reduced Power: The vehicle may experience a loss of power or reduced acceleration due to the ECM going into a limp mode.
  3. Poor Fuel Efficiency: High exhaust gas temperatures can impact fuel combustion efficiency, leading to decreased fuel economy.
  4. Failed Emissions Test: If the EGT sensor is not functioning correctly, the vehicle may fail emissions tests due to high exhaust gas temperature readings.

How to Fix P2033 Mercury

  1. Diagnostic: Use a scan tool to retrieve the trouble codes and perform a thorough inspection of the EGT sensor and related components.
  2. Replace EGT Sensor: If the sensor is faulty, replace it with a new, OEM sensor and ensure proper installation.
  3. Check Wiring: Inspect the wiring harness connected to the EGT sensor for any damage or corrosion, and repair or replace as necessary.
  4. Repair Exhaust Leaks: Address any exhaust leaks in the system that may be causing false high temperature readings.
  5. ECM Reprogramming: In some cases, reprogramming the ECM with the latest software updates may be necessary to resolve the P2033 code.

Cost to Fix P2033 Mercury

The typical repair costs for addressing the P2033 code on a Mercury vehicle can range from $200 to $500, including parts and labor. However, it's essential to note that specific diagnosis time and labor rates at auto repair shops can vary significantly based on factors such as location, vehicle make and model, and engine type. Most auto repair shops charge between $80 and $150 per hour for labor, but rates can be higher in metropolitan areas or at dealerships, while independent shops may offer lower rates. It is recommended to obtain quotes from local shops to get a more accurate estimate for the repair.

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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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