P0540 Engine Trouble Code
When you check engine light came on code P0540 the reason should be Engine Light ON (or Service Engine Soon Warning Light). However your vehicle's manufacturer may have a different definition for the P0540 OBD-II Diagnostic Powertrain (P) Trouble Code. So you should chech it on our car models.
When the check engine light comes P0540 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.
P0540 Code Meaning :
|OBD-II Diagnostic Powertrain (P) Trouble Code For Engine||Intake Valve Control Solenoid Circuit Low||Fuel Composition Sensor Circuit Malfunction||Engine Shutoff Solenoid Malfunction||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.
P0540 OBD-II Diagnostic Powertrain (P) Trouble Code DescriptionP0540 OBD-II Trouble Code The Engine Control Module ( P0540 code.
Reason For P0540 CodeThe reason of P0540 OBD-II Engine Trouble Code is Fuel Composition Sensor Circuit Malfunction.
P0540 DTCs may also be triggered by faults earlier down the line. For example, a dirty MAF sensor might be causing the car to overcompensate in its fuel-trim adjustments. As a result, oxygen sensors are likely to report fuel mixture problems.