P0440 Engine Trouble Code
When you check engine light came on code P0440 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 P0440 OBD-II Diagnostic Powertrain (P) Trouble Code. So you should chech it on our car models.
Theoretically you can drive for a few weeks or even months with a broken MAF sensor. You will notice a decrease in gas mileage and over time the car will eventually start stalling a lot. At a shop, the replacement cost is between $200-$300 depending on the car, but that's usually the cost of parts because the labor is relatively simple.
P0440 Code Meaning :
|OBD-II Diagnostic Powertrain (P) Trouble Code For Engine||Intake Valve Control Solenoid Circuit Low||Fuel Temperature Sensor B Circuit Range/Performance||Engine Shutoff Solenoid Malfunction||Exhaust Gas Recirculation Sensor B Circuit High|
The catalytic converter has an oxygen sensor in front and behind it. When the vehicle is warm and running in closed loop mode, the upstream oxygen sensor waveform reading should fluctuate.
P0440 OBD-II Diagnostic Powertrain (P) Trouble Code DescriptionP0440 OBD-II Trouble Code The Engine Control Module (ECM) tests the Evaporative Emission (EVAP) system for the following conditions: P0440 code.
Reason For P0440 CodeThe reason of P0440 OBD-II Engine Trouble Code is Fuel Temperature Sensor B Circuit Range/Performance.
P0440 DTC reports a sensor fault, replacement of the sensor is unlikely to resolve the underlying problem. The fault is most likely to be caused by the systems that the sensor is monitoring, but might even be caused by the wiring to the sensor itself.