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P0040 Engine Trouble Code

P0040 Engine

When you check engine light came on code P0040 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 P0040 OBD-II Diagnostic Powertrain (P) Trouble Code. So you should chech it on our car models.

When the check engine light comes P0040 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.

P0040 Code Meaning :

P 0 0 4 0
OBD-II Diagnostic Powertrain (P) Trouble Code For Engine Intake Valve Control Solenoid Circuit Low 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.

P0040 OBD-II Diagnostic Powertrain (P) Trouble Code Description

P0040 OBD-II Trouble Code O2 Sensor Signals Swapped Bank 1 Sensor 1/Bank 2 Sensor 1 is the generic definition for the P0040; however your vehicles manufacturer may have a different definition and information for the P0040 code P0040 code.

Reason For P0040 Code

The reason of P0040 OBD-II Engine Trouble Code is .

P0040 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.