Some Mazda vehicles (2007-2009 Mazda3 and 2007-2010 Mazda5 produced before Nov. 6, 2009), may experience the MIL on with DTC P0131/P2251 because the A/F sensor connector bracket contacts and damages the sensor harness. To prevent interference, the shape of the sensor connector bracket has been changed
Some Mazda vehicles (2007-2009 Mazda3 and 2007-2010 Mazda5 produced before Nov. 6, 2009), may experience the MIL on with DTC P0131/P2251 because the A/F sensor connector bracket contacts and damages the sensor harness. To prevent interference, the shape of the sensor connector bracket has been changed.
DTC P0131: A/F sensor circuit low output
DTC P2251: A/F sensor negative current control circuit open
Inspect the A/F sensor harness for damage. If the harness is damaged, bend the sensor harness connector bracket to prevent interference, than replace the A/F sensor.
Note: be sure to cover the tips of pliers with vinyl tape to prevent damaging the bracket surface (to prevent future rusting).
Using pliers, bend the bracket to create 8mm or more clearance between the harness and the edge of the bracket.
Learn how electronic parking brake actuators have replaced manual systems and now play a key role in advanced safety features like automatic emergency braking. This WIYB Training...
Not all fuel injectors are created equal. In this WIYB Training Series, we compare Standard® Fuel Injectors against OE, low-cost imports. See why precision engineering and rigorous...
Carrying active OEM subscriptions for all manufacturers is not possible for many shops. However, access to this software is required for certain modern vehicles and repairs, and...
Learn how to properly lubricate your AIRCAT air tools to keep them running at peak performance. Discover essential daily maintenance and storage techniques, along with the right...
Voice Your Opinion!
To join the conversation, and become an exclusive member of Vehicle Service Pros, create an account today!
