Mazda B2300 U3938 Engine Trouble Code

When the check engine light comes Mazda B2300 U3938 code on the first you should check is the gas cap. Pull over, retighten it, and take a look at the cap to see if it has any cracks in it. Continue driving and see if the check engine light turns off. Alternately, you can purchase a gas cap for about $3 at an auto parts store. All you need to do is take the old one off and screw on the new one. If you've already made it to the store, you might as well just replace it. While not car-threatening, it's good to take care of this right away to improve gas mileage.

Mazda B2300 U3938 Code Meaning :

When you check Mazda B2300 car engine light came on code U3938 the reason should be . However manufacturer may have a different definition for the U3938 OBD-II Diagnostic Network (U) Trouble Code. So you should chech it on our car models.

U3938 OBD-II Diagnostic Network (U) Trouble Code Description

U3938 engine trouble code is about Exhaust Gas Recirculation Sensor B Circuit High.

Reason For U3938 Code

The reason of U3938 OBD-II Engine Trouble Code is Engine Oil Temperature Sensor Malfunction.

U3938 code on vehicles with electronically controlled automatic transmissions, the 3-4 shift solenoid is responsible for actuating the hydraulic circuits to activate clutches or bands that change gears inside the automatic transmission.

U3937 Previous Engine Trouble Code For Mazda B2300

Next Engine Trouble Code For Mazda B2300 U3939