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P0438 Engine Trouble Code

Meaning of P0438 engine trouble code is : P0438 if your catalytic convertor fails completely, you eventually won't be able to keep the car running. Your gas mileage will also be terrible, so you should try and fix it as soon as you can. Unfortunately, the average replacement cost is around $2,000 and you can't do it yourself unless you're an experienced mechanic.

P0438 Possible Solution:

P0438 Engine

The crankshaft sensor signals the fuel injection computer or the ignition control when the cylinders are firing. This causes the ignition coil to provide a spark and the injector to inject fuel into each cylinder at the right time.If either sensor isn't working correctly, the car will run rough and the engine will be less efficient. In later car models, the car's computer can usually keep the vehicle running, but the engine warning light on the dashboard goes on to warn the driver.

P0438 Code Meaning :

P 0 4 3 8
OBD-II Diagnostic Powertrain (P) Trouble Code For Engine Intake Valve Control Solenoid Circuit Low O2 Sensor Heater Circuit Malfunction Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector) Clutch Position Sensor 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.

P0438 OBD-II Diagnostic Powertrain (P) Trouble Code Description

P0438 OBD-II Trouble Code The Engine Control Module ( P0438 code.

Reason For P0438 Code

The reason of P0438 OBD-II Engine Trouble Code is O2 Sensor Heater Circuit Malfunction.

Parts or components should not be replaced with reference to only a P0438 DTC. The vehicle service manual should be consulted for more information on possible causes of the fault, along with required testing.