DTC 62 - Turbo Boost Sensor CKT Low: Notes

The PCM sends a 5-volt reference signal to the boost sensor. As manifold pressure changes, the electrical resistance of the boost sensor also changes. By monitoring the sensor output voltage, PCM detects how much pressure is being produced by the turbocharger in the intake manifold. The PCM uses the 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 the result of a hard failure or an intermittent condition.
2. This step simulates conditions for DTC 61. If the PCM recognizes the change, then the PCM, and the 5-volt reference circuit and the boost signal circuit are okay.