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P1242 Engine Trouble Code

P1242 Engine

When you check engine light came on code P1242 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 P1242 OBD-II Diagnostic Powertrain (P) Trouble Code. So you should chech it on our car models.

When the check engine light comes P1242 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.

P1242 Code Meaning :

P 1 2 4 2
OBD-II Diagnostic Powertrain (P) Trouble Code For Engine Fuel And Air Metering Ambient Air Temperature Sensor Circuit Low Engine Shutoff Solenoid Malfunction Crankshaft Position Sensor A Circuit Low Input

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.

P1242 OBD-II Diagnostic Powertrain (P) Trouble Code Description

P1242 OBD-II Trouble Code Sensor Power Supply High Input is one of the definitions for the P1242; however your vehicles manufacturer may have a different definition for the P1242 code. Please check below for your specific make P1242 code.

Reason For P1242 Code

The reason of P1242 OBD-II Engine Trouble Code is Ambient Air Temperature Sensor Circuit Low.

P1242 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.