Conditions For Running DTC

WARNING: This page is about a different car, the 2001 GMC Sonoma and 2001 Chevrolet S10 Pickup. However, it is still accessible from the selected car via links, so may be relevant.

BARO pressure is greater than 75 kPa.
Fuel level is 1/4-3/4.
Battery voltage is 10-18 volts.
Difference between ECT and IAT is less than 14°F (8°C).
ECT and IAT are 39-86°F (4-30°C).
Fuel ethanol content is less than 11 percent.

Test will initiate only after a cold start. Failure to meet the necessary requirements may produce inaccurate test results.