DTC 62, Turbo Boost Sensor Circuit Low - "P" Series: Notes

PCM sends a 5-volt reference signal to boost sensor. As manifold pressure changes, electrical resistance of boost sensor also changes. By monitoring sensor output voltage, PCM detects how much pressure is being produced by turbocharger in intake manifold. PCM uses boost sensor to control turbo boost and fuel at different loads. DTC 62 will set when boost signal voltage is less than .8 volt. PCM will default to no turbo boost and limited fuel.

1. This step determines if DTC 62 is result of a hard failure or an intermittent condition.
2. This step simulates conditions for DTC 61. If PCM recognizes change, then PCM, 5-volt reference circuit and boost signal circuit are okay.