Lexus Error Code P2238: How to Fix It

Q: Can I drive my Lexus with P2238 code?

You can drive short distances, but the vehicle may have poor fuel economy, rough idling, and increased emissions. Extended driving with this code can damage the catalytic converter, so repair it promptly.

Q: How much does it cost to fix P2238?

DIY repair typically costs $50-150 for a new oxygen sensor. Professional repair ranges from $200-400 including parts and labor. Costs vary by model year and engine type.

Q: What causes oxygen sensor failure in Lexus vehicles?

Common causes include normal wear (sensors last 60,000-100,000 miles), contamination from oil or coolant leaks, using non-recommended fuel additives, or electrical issues in the wiring harness.

Q: Will P2238 cause my Lexus to fail emissions testing?

Yes, P2238 will typically cause your vehicle to fail emissions testing because the faulty oxygen sensor prevents proper air-fuel mixture monitoring. The code must be resolved and the system must complete its readiness tests before passing emissions.

Abstract

The P2238 error code indicates your Lexus has detected a problem with the oxygen sensor's pumping current circuit being too low on Bank 1, Sensor 1. This air-fuel ratio sensor helps your engine run efficiently by monitoring exhaust gases. When this circuit fails, your engine may run rough, consume more fuel, or fail emissions testing.