Conditions For Setting DTC

WARNING: This page is about a different car, the 2002 Pontiac Grand Am, 2002 Oldsmobile Alero, 2002 Chevrolet Monte Carlo, and 2002 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.

The ratio of 24X reference pulses to 3X reference pulses received by the PCM does not equal 8.
The ratio of 24X reference pulses to CMP PCM input pulses received by the PCM equals 48.
The conditions are present for more than 10 seconds.