B1990 Engine Trouble Code
When you check engine light came on code B1990 the reason should be . However your vehicle's manufacturer may have a different definition for the B1990 OBD-II Diagnostic Body (B) Trouble Code. So you should chech it on our car models.
When the check engine light comes B1990 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.
B1990 Code Meaning :
|OBD-II Diagnostic Body (B) Trouble Code For Engine||Fuel And Air Metering||Injector Circuit Malfunction - Cylinders||Cylinder 4 Contribution/Balance Fault||Exhaust Gas Recirculation Sensor B Circuit High|
The oxygen (02) sensors on your car measure the oxygen in the exhaust to determine how rich or lean the ratio of fuel and air are in the cylinders. Optimizing this mixture means better fuel economy and fewer exhaust emissions.
B1990 OBD-II Diagnostic Body (B) Trouble Code DescriptionB1990 engine trouble code is about Exhaust Gas Recirculation Sensor B Circuit High.
Reason For B1990 CodeThe reason of B1990 OBD-II Engine Trouble Code is Injector Circuit Malfunction - Cylinders.
B1990 DTC specifically refers to the camshaft (cam) timing. In this case, if the cam timing is over-retarded, the engine light will be illluminated and the code will be set.