P0257 Engine Trouble Code
When you check engine light came on code P0257 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 P0257 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.
P0257 Code Meaning :
|OBD-II Diagnostic Powertrain (P) Trouble Code For Engine||Intake Valve Control Solenoid Circuit Low||Ambient Air Temperature Sensor Circuit Low||Turbocharger Boost Sensor A Circuit Low||Crankshaft Position Sensor B Circuit Malfunction|
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.
P0257 OBD-II Diagnostic Powertrain (P) Trouble Code DescriptionP0257 engine trouble code is about Crankshaft Position Sensor B Circuit Malfunction.
Reason For P0257 CodeThe reason of P0257 OBD-II Engine Trouble Code is Ambient Air Temperature Sensor Circuit Low.
P0257 the main thing to check is to verify the operation of the VCT solenoid. You're looking for a sticking or stuck VCt solenoid valve caused by contamination. Refer to vehicle specific repair manual to perform component tests for the VCT unit.