Toyota Error Code P1150: How to Fix It

Medium 1-2 hours Medium Severity Verified June 2026
Error Code
P1150
Brand
Toyota
Product Type
automotive
Severity
Medium
DIY Difficulty
Medium
Estimated Fix Time
1-2 hours
Toyota error code P1150 indicates a problem with the Air/Fuel (A/F) sensor circuit range or performance on Bank 2, Sensor 1. This sensor monitors the air-fuel mixture in your engine's exhaust, and when it's not working properly, it can affect fuel economy and emissions.
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Tools You'll Need

How to Fix Error Code P1150

  1. Safety First

    Never work on a hot engine or exhaust system. Allow at least 30 minutes for cooling after driving.
  2. Scan for Additional Codes

  3. Locate the A/F Sensor

    The exhaust system may still be hot even after cooling. Use gloves when working near exhaust components.
  4. Inspect the Wiring Harness

  5. Test the A/F Sensor Voltage

    Be careful when testing with the engine running. Keep hands and tools away from moving parts.
  6. Check for Exhaust Leaks

  7. Replace the A/F Sensor if Faulty

    Do not over-tighten the sensor as this can damage the threads in the exhaust manifold.
  8. Test Drive and Verify Fix

Parts You May Need

Air/Fuel (A/F) sensor
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Wiring harness repair kit
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Air/Fuel (A/F) sensor
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Wiring harness repair kit
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Air/Fuel (A/F) sensor
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Wiring harness repair kit
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Air/Fuel (A/F) sensor
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Wiring harness repair kit
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Air/Fuel (A/F) sensor
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Wiring harness repair kit
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Air/Fuel (A/F) sensor
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Wiring harness repair kit
Check Price on Amazon
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When to Call a Professional

Call a professional mechanic if you're uncomfortable working with electrical components, if the code persists after replacing the sensor, if you find extensive wiring damage, or if multiple related codes are present. Also seek professional help if you lack the proper tools or experience working on exhaust systems.

Frequently Asked Questions

Can I drive with Toyota error code P1150?
You can drive short distances, but the vehicle should be repaired soon. The faulty A/F sensor can cause poor fuel economy, rough idling, and potential damage to the catalytic converter if left unrepaired for too long.
How much does it cost to fix Toyota P1150?
DIY repair costs $100-200 for a replacement A/F sensor. Professional repair typically costs $300-500 including parts and labor, depending on your Toyota model and local labor rates.
What causes Toyota P1150 error code?
Common causes include a faulty A/F sensor, damaged wiring or connectors, exhaust leaks near the sensor, or contamination of the sensor from oil leaks or fuel additives.
How do I reset Toyota P1150 code?
Use an OBD2 scanner to clear the code after completing repairs. You can also disconnect the battery for 15 minutes, but this will reset other vehicle settings. The code will return if the underlying problem isn't fixed.
Is P1150 the same as P0150?
No, P1150 is a Toyota-specific code for A/F sensor issues, while P0150 is a generic OBD2 code for oxygen sensor problems. They relate to similar components but have different diagnostic procedures.