P2438 Mazda Marathon OBD Code

OBD/2 P2438 error code description and symptoms.

Throttle Position (TP) Sensor Intermittent The TP sensor circuit is monitored by the PCM for sudden TP rotation angle (or voltage) input change through the comprehensive component monitor (CCM). If during the last 80 warm-up cycles in key ON engine running the PCM detects a TP rotation angle (or voltage) changes beyond the minimum or maximum calibrated limit, a continuous diagnostic trouble code (DTC) is stored. Poor continuity through the TP sensor connectors Poor continuity through the TP harness Intermittent open or short inside the TP sensor While accessing the TP V PID on the scan tool, lightly tap on the TP sensor or wiggle the TP sensor connector and harness.

As long as the throttle plate remains closed, the idling speed and quality is controlled by the PCM via the idle control valve, and as can be seen from the above it should be clear that idle control on a gasoline engine is a complex affair. For instance, if the engine is started in sub-zero temperatures, the PCM will command the idling control valve to allow less air to enter the engine to enrich the air/fuel mixture to create a condition which is roughly analogous to how chokes worked on carburetted engines to control idling in cold weather.

P2438 Mazda Marathon Error Code Repair Process :

If your p2438 secondary air injection system air flow/pressure sensor circuit high bank 2 check engine light is illuminated, it's best to take it in for diagnostic testing, which can feel like a hassle. Because while the lights vary in appearance from vehicle to vehicle, all have the same basic meaning: There's a problem with the car's emissions system. The on-board diagnostics system P2438 and engine control unit are in charge of monitoring a bunch of different p2438 secondary air injection system air flow/pressure sensor circuit high bank 2, and if they get a reading that's a little out of whack, up pops the check engine light.

Common Causes of Mazda Marathon P2438 OBD2 Code

A common cause of code P2438 is the failure of P2438 Secondary Air Injection System Air Flow/Pressure Sensor Circuit High Bank 2, but there are several other possible causes as well, such as ;

Damaged VCT phaser
1Camshaft Position Sensor circuit poor electrical connection
Clogged or faulty fuel injector (s)
Open or short in the CMP sensor circuits

P2438 is a kind of Powertrain Trouble Code

Powertrain of a modern automobile, comprising engine (with exhaust system), transmission, drive shaft, suspension and the wheels. In a motor vehicle, the term powertrain or powerplant describes the main components that generate power and deliver it to the road surface, water, or air.

Engine OBD 2 Codes website is a freeware resource center for engine trouble codes.

About Us | Contact | Privacy

P2438 Mazda Marathon OBD Code

P2438 Mazda Marathon Error Code Repair Process :

Common Causes of Mazda Marathon P2438 OBD2 Code

P2438 code for other Mazda cars