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
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Tools You'll Need
- OBD2 scanner
- Multimeter
- Oxygen sensor socket or wrench
- Socket set
- Wire brush
- Anti-seize compound
- Safety gloves
How to Fix Error Code P1150
-
Safety First
Never work on a hot engine or exhaust system. Allow at least 30 minutes for cooling after driving. -
Scan for Additional Codes
-
Locate the A/F Sensor
The exhaust system may still be hot even after cooling. Use gloves when working near exhaust components. -
Inspect the Wiring Harness
-
Test the A/F Sensor Voltage
Be careful when testing with the engine running. Keep hands and tools away from moving parts. -
Check for Exhaust Leaks
-
Replace the A/F Sensor if Faulty
Do not over-tighten the sensor as this can damage the threads in the exhaust manifold. -
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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Exhaust gasket
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Air/Fuel (A/F) sensor
Check Price on Amazon
Wiring harness repair kit
Check Price on Amazon
Exhaust gasket
Check Price on Amazon
Air/Fuel (A/F) sensor
Check Price on Amazon
Wiring harness repair kit
Check Price on Amazon
Exhaust gasket
Check Price on Amazon
Air/Fuel (A/F) sensor
Check Price on Amazon
Wiring harness repair kit
Check Price on Amazon
Exhaust gasket
Check Price on Amazon
Air/Fuel (A/F) sensor
Check Price on Amazon
Wiring harness repair kit
Check Price on Amazon
Exhaust gasket
Check Price on Amazon
Air/Fuel (A/F) sensor
Check Price on Amazon
Wiring harness repair kit
Check Price on Amazon
Exhaust gasket
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.