C278E Chevrolet Vega OBD Code

OBD/2 C278E 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.

One example of this would be when an automatic vehicle in placed in gear. To prevent the added drag from the torque converter and transmission from reducing the idling speed, the PCM will command the idle control valve to allow more air to enter the engine, while at the same time, adjusting the injector pulse width to inject more fuel to suit the increased amount of air. Note that the idle air control valve is closed by the PCM when the throttle plate is opened to prevent excess air from entering the engine.

C278E Chevrolet Vega Error Code Repair Process :

If your brake pedal input circuit ground short 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 C278E and engine control unit are in charge of monitoring a bunch of different brake pedal input circuit ground short, and if they get a reading that's a little out of whack, up pops the check engine light.

Common Causes of Chevrolet Vega C278E OBD2 Code

A common cause of code C278E is the failure of Brake Pedal Input Circuit Ground Short, but there are several other possible causes as well, such as ;

Damaged VCT phaser
EVAP system hose leaking
Exhaust gas leaks
Fuel pressure

C278E is a kind of Chassis Trouble Code

Diagnosing chassis noises can be one of the most frustrating problems technicians face. Fortunately, manufacturers have engineered noise, vibration and harshness (NVH) diagnostic techniques and equipment to find the source of the noise.

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

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C278E Chevrolet Vega OBD Code

C278E Chevrolet Vega Error Code Repair Process :

Common Causes of Chevrolet Vega C278E OBD2 Code

C278E code for other Chevrolet cars