P0638 Engine Trouble Code
When you check engine light came on code P0638 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 P0638 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.
P0638 Code Meaning :
|OBD-II Diagnostic Powertrain (P) Trouble Code For Engine||Intake Valve Control Solenoid Circuit Low||O2 Sensor Heater Circuit Malfunction||Cold Start Injector 1 Malfunction||Timing Reference High Resolution Signal A Too Many Pulses|
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.
P0638 OBD-II Diagnostic Powertrain (P) Trouble Code DescriptionP0638 OBD-II Trouble Code The Powertrain Control Module ( P0638 code.
Reason For P0638 CodeThe reason of P0638 OBD-II Engine Trouble Code is O2 Sensor Heater Circuit Malfunction.
P0638 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.