What Does P0438 Mean? Your vehicle’s PCM takes data regarding temperature and exhaust composition from the oxygen sensors in order to determine the required degree of catalyst efficiency. If the proper level is not found, then the PCM stores a P048 code indicating that engine bank 2 is not working properly. engine code P0438P0438 fixobd P0438dtc P0438obd code P0438obd2 P0438P0438 car codediagnostic code P0438car code P0438check engine code P0438fehlercode P0438P0438 fiatcodigo P0438codigo falla P0438P0438 kody b??dówcodigo de falla P0438 What are the common causes of P0438 ? The most common cause of this code is due to a faulty catalytic converter. Bad oxygen sensors are also a possibility but if this is the case an oxygen sensor code will usually accompany the catalytic converter code. Always diagnose and repair oxygen sensor codes before attempting to diagnose catalytic converter codes. Since the catalytic converter is not designed to wear out, its failure is normally associated with some contributing malfunction. Contributing factors in catalytic converter failure may include incorrect fuel usage, excessive fuel being dumped into the exhaust system due to a faulty coolant temperature sensor, mass air flow sensor, manifold air pressure sensor, fuel pressure regulator, or fuel injection component, an ignition misfire, retarded spark timing, or oil contamination. Leaks from an exhaust manifold, down pipe, flex hose, or other exhaust component that is upstream from the catalytic converter can also appear to the PCM as catalytic converter failure. How do you troubleshoot P0438 ? There are currently two main types of cylinder deactivation used today, depending on the type of engine. P0438 code for the pushrod design which uses solenoids to alter the oil pressure delivered to the lifters. In their collapsed state, the lifters are unable to elevate their companion pushrods under the valve rocker arms, resulting in valves that cannot be actuated and remain closed. Searches related to P0438 - Catalyst Temperature Sensor High Input Bank 2 Sensor 1 p0483 subaru p2002
