P0171 System Too Lean: Troubleshooting your 2002 Toyota Camry

If your car is stalling and the check engine light is on, it could be due to a mass airflow sensor problem. In this article, we’ll guide you through diagnosing and fixing this issue.

Recently, a car owner experienced stalling issues with his 2010 Camry and found that the check engine light was on. Upon checking the error codes, it was indicated that the system was running too lean and that there was a problem with the mass airflow circuit. Further examination with live data confirmed that the mass airflow sensor was not reading at all.

To resolve this, the car owner decided to replace the mass airflow sensor. The process involved locating the sensor, which was on top of the airbox, and removing it with two Phillips head screws. After installing the new sensor, the car owner cleared the error codes and checked the live data again. This time, the mass airflow sensor was reading as expected, confirming that the issue was resolved.

This fix illustrates that in many cases, mass airflow sensor issues are caused by dirt accumulation. It’s advisable to also check the air filter and ensure it’s correctly installed, as well as inspect for any vacuum leaks at the airbox that could allow dust to enter. Addressing these factors can help prevent future problems with the mass airflow sensor.

The part used for the replacement was sourced from Napa and cost $90.

So, if you find your car stalling and encountering similar issues, consider checking the mass airflow sensor and following the steps outlined in this article to potentially resolve the problem.

What could be causing my 2010 Camry to stall out and not run properly?

If your 2010 Camry is stalling out and not running properly, it could be due to a problem with the mass airflow sensor. This can cause the system to run too lean and lead to stalling. Checking the codes and live data can help diagnose the issue.

How did the person in the video fix their car?

In the video, the person fixed the issue by installing a new mass airflow sensor. After replacing the sensor, they cleared the codes, checked the live data, and verified that the new sensor was reading correctly, ultimately resolving the problem.

What are some tips for maintaining a mass airflow sensor?

To maintain a mass airflow sensor, it’s essential to ensure that the sensor remains clean and free from debris. Checking and replacing the air filter regularly can help prevent the sensor from getting dirty and malfunctioning. Additionally, checking for vacuum leaks at the air box can also contribute to the proper functioning of the sensor.

How much did the replacement part cost?

The replacement mass airflow sensor used in the video was from Napa and cost $90.

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