Code Enable Criteria

• DTCs P0105, P0107, P0108, P0112, P0113, P0117, P0118, P0122, P0123, P0171, P0201-P0204, P0300, P0301-P0304, P0335, P0440, P0442, P0446, P0506, P0507, P0601, P0602, or P1441 are not set.
• Engine Coolant Temperature (ECT) is more than 158°F (70°C).
• Engine speed is 1600-2450 RPM.
• Engine is operating in closed loop.
• Throttle Position (TP) angle is between 9-18 percent.
• Evaporative emissions control system is commanded open for more than 36 percent.
• Purge learned memory is more than approximately 0.78.
• Fuel level is more than 10 percent.
• Diagnostic test completes when 30 seconds of accumulated time has been spent in specified conditions.

DTC sets when number of rich to lean counts is less than 2, or lean to rich counts is less than 2.