Lexus Acura Error Code P1129: How to Fix It

Q: Can I drive with P1129 error code?

While the vehicle may still run, driving with P1129 is not recommended as it can cause unpredictable throttle response, stalling, or reduced power. Have it diagnosed and repaired as soon as possible.

Q: How much does it cost to fix P1129?

Repair costs range from $150-600 depending on the issue. Simple cleaning and relearn procedures cost around $150-250, while throttle body replacement can cost $400-600 including labor.

Q: Will P1129 cause my car to fail emissions?

Yes, P1129 will typically cause your vehicle to fail emissions testing since it indicates a malfunction in the throttle control system, which affects engine performance and emissions.

Q: How do I prevent P1129 from happening again?

Regular maintenance including air filter replacement, using quality fuel with detergents, and periodic throttle body cleaning (every 30,000 miles) can help prevent carbon buildup that leads to P1129.

Abstract

The P1129 error code on Lexus and Acura vehicles indicates a malfunction in the electronic throttle control system, which manages the throttle body's opening and closing. This high-severity issue can cause poor acceleration, rough idling, or even stalling, requiring immediate attention to prevent further engine damage.