Check Engine Light With Code P0171 and/or P0174 on Lexus ES330

Problem Description and Possible Solution

The Check Engine Light may illuminate with codes P0171 and/or P0174 due to a lean running engine. Symptoms may include: Hesitation on acceleration, lack of power, and poor fuel mileage. This is commonly caused by a dirty mass airflow sensor. Our technicians tell us the sensor may be cleaned using an approved cleaner but replacement is often required to correct this issue.

Problem Data
RepairPal Verified
Average mileage: 99,562 (64,000–120,000)
3 model years affected: 2004, 2005, 2006
11 people reported this problem
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