Lexus Acura Error Code P1115: How to Fix It

Q: Can I drive with P1115 error code?

You can drive short distances, but avoid extended trips. The faulty coolant sensor can cause poor fuel economy, rough idle, and potential overheating. Get it diagnosed and repaired within a few days to prevent engine damage.

Q: How much does it cost to fix P1115?

DIY repair typically costs $20-80 for a new coolant temperature sensor plus any needed coolant. Professional repair ranges from $150-300 including parts, labor, and diagnostic time.

Q: What causes coolant temperature sensor failure?

Common causes include normal wear (sensors typically last 100,000+ miles), coolant contamination, electrical connector corrosion, damaged wiring from heat or rodents, and cooling system problems like low coolant or overheating.

Q: Is P1115 the same on all Lexus and Acura models?

P1115 generally refers to coolant temperature sensor issues across most Lexus and Acura models, but specific diagnostic procedures may vary by year and engine type. Always consult your vehicle's service manual for exact specifications.

Q: Will P1115 cause my car to fail emissions testing?

Yes, P1115 will likely cause emissions test failure since it's an active diagnostic trouble code. The error must be resolved and the code cleared before passing emissions testing.

Abstract

The P1115 error code indicates your Lexus or Acura's engine coolant temperature sensor is reading outside its normal operating range or performing inconsistently. This can cause poor engine performance, reduced fuel economy, and potential overheating issues. Most cases involve a faulty sensor, damaged wiring, or cooling system problems that affect sensor readings.