Powertrain Control Module (Pcm)

The Powertrain Control Module (PCM) has memory storage and a permanent diagnostic trouble code memory. For PCM application, see PCM APPLICATION table.

PCM APPLICATION

Model

PCM No.

⁽²⁾ 8D0 906 266 A

⁽¹⁾	Always check with vehicle manufacturer for latest application.

⁽²⁾	Some A4 models may be equipped with PCM 8D0 906 266.

New PCM must be coded with the Volkswagen Audi Group (VAG) 1551 scan tool when installed in vehicle. See TESTS W/CODES article for PCM coding information.

The PCM receives input signals from various engine sensors. These input signals are used to control idle speed, fuel delivery and ignition timing to maintain optimum performance, fuel economy and emission standards.

NOTE: Components are grouped into 2 categories: input (sensor) devices and output (actuator) signals. INPUT DEVICES are components that control or produce voltage signals monitored by PCM. OUTPUT SIGNALS are components controlled by PCM.