DTC P050B: Cold Start Ignition Timing Performance: General Description

With the ignition switch in the "ON" or "START" position, voltage is applied to the ignition coil. Each ignition coil consists of two coils, a primary and secondary coil. The coils are mounted on top of the spark plugs. To energize the primary ignition coils, the Powertrain Control Module (ECM/PCM) provides the ground to the primary circuit. The ECM/PCM uses the crankshaft position sensor and camshaft position sensor signals to time the energizing of the coil. When a primary ignition coil is energized and de-energized, the secondary coil produces a high voltage spike to the attached spark plug.