Troubleshooting Guide for OBD-II Error Code P2033: Exhaust Gas Temp Sensor Circuit B1S2 High

Medium 1-2 hours Medium Severity Verified June 2026
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Error Code
P2033
Brand
OBD-II Generic
Product Type
automotive
Severity
Medium
DIY Difficulty
Medium
Estimated Fix Time
1-2 hours
Error code P2033 indicates the Powertrain Control Module (PCM) has detected a high voltage signal from the exhaust gas temperature (EGT) sensor located on Bank 1, Sensor 2 (downstream of the catalytic converter). This typically means the sensor is faulty, has a short circuit, or there's an issue with the wiring. Ignoring this code can lead to reduced fuel efficiency and potential damage to the catalytic converter.
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Tools You'll Need

How to Fix Error Code P2033

  1. Check for Additional Codes

  2. Visual Inspection of Sensor and Wiring

    Ensure engine is off and cool before working near exhaust components to avoid burns.

  3. Test Sensor Voltage

    Use caution when probing near hot exhaust components.

  4. Test Sensor Resistance

  5. Replace the EGT Sensor

    Allow exhaust system to cool completely before removal to prevent injury.

  6. Clear Codes and Test Drive

Parts You May Need

Exhaust Gas Temperature Sensor (Bank 1 Sensor 2)
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Exhaust Gas Temperature Sensor (Bank 1 Sensor 2)
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Exhaust Gas Temperature Sensor (Bank 1 Sensor 2)
Check Price on Amazon
Exhaust Gas Temperature Sensor (Bank 1 Sensor 2)
Check Price on Amazon
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When to Call a Professional

If the code returns after sensor replacement, or if you are uncomfortable working with exhaust components and electrical systems, consult a professional mechanic. A failing catalytic converter or PCM issue may require expert diagnosis.

Frequently Asked Questions

Can I drive with P2033 error code?
Yes, you can drive short distances, but it may reduce fuel economy and increase emissions. Prolonged driving can damage the catalytic converter.
What causes OBD-II code P2033?
Common causes include a faulty EGT sensor, damaged wiring or connector, short circuit to power, or in rare cases a PCM malfunction.
Where is the Bank 1 Sensor 2 EGT sensor located?
Bank 1 is the side of the engine with cylinder #1. Sensor 2 is downstream of the catalytic converter, usually mounted in the exhaust pipe after the cat.
How much does it cost to fix code P2033?
DIY cost is around $50-$150 for the sensor and tools. Professional repair costs $150-$400 including labor.
Can a bad EGT sensor cause poor acceleration?
Indirectly yes. A faulty sensor can cause incorrect air-fuel mixture adjustments, leading to reduced power and poor fuel economy.

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