Acura Error Code P0171: How to Fix It

Q: Can I drive my Acura with P0171 code?

You can drive short distances with P0171, but avoid extended highway driving or heavy acceleration. The lean condition can cause engine damage over time, including overheating and catalytic converter failure. Address the issue as soon as possible.

Q: What causes P0171 code in Acura vehicles?

Common causes include vacuum leaks, dirty or faulty MAF sensor, clogged fuel injectors, failing fuel pump, dirty air filter, and faulty oxygen sensors. Vacuum leaks are the most frequent cause in older Acura models.

Q: How much does it cost to fix P0171 in an Acura?

Costs range from $20 for an air filter replacement to $800+ for fuel pump replacement. Most common fixes like cleaning the MAF sensor ($15-30) or replacing vacuum hoses ($50-150) are relatively inexpensive.

Q: Will P0171 cause my Acura to fail emissions testing?

Yes, P0171 will typically cause your vehicle to fail emissions testing. The code indicates the engine isn't running at optimal air-fuel ratios, which affects emission levels. You must fix the underlying problem before passing emissions.

Q: How often should I clean the MAF sensor to prevent P0171?

Clean the MAF sensor every 30,000-50,000 miles or whenever you replace the air filter. If you drive in dusty conditions or haven't changed your air filter regularly, you may need to clean it more frequently.

Abstract

The P0171 error code in your Acura indicates that the engine's air-fuel mixture is too lean on Bank 1, meaning there's too much air and not enough fuel. This can cause rough idling, poor acceleration, and increased emissions. While this code requires attention, most causes can be diagnosed and fixed with basic automotive knowledge.