Conditions for Running the DTC

Heater Current Test

• DTCs P0068, P0101, P0102, P0103, P0106, P0107, P0108, P0117, P0118, P0120, P0121, P0201, P0202, P0203, P0204, P0442, P0443, P0446, P0449, P0452, P0453, P0496, P1516, P2101, P2135, or P2176 are not set.
• The Engine Coolant Temperature (ECT) Sensor parameter is more than 70°C (158°F).
• The Ignition 1 Signal parameter is between 11-18 volts.
• The Mass Airflow (MAF) Sensor parameter is between 5-25 g/s.
• The Engine Run Time parameter is more than 60 seconds.
• The Engine Speed parameter is between 500-3,000 RPM.
• The Ignition 1 Signal parameter varies less than 1 volt.
• DTC P0141 runs the heater current test twice per drive cycle when the above conditions are met for 2 seconds.

Heater Resistance Test

• DTCs P0068, P0101, P0102, P0103, P0106, P0107, P0108, P0117, P0118, P0120, P0121, P0201, P0202, P0203, P0204, P0442, P0443, P0446, P0449, P0452, P0453, P0496, P1516, P2101, P2135, or P2176 are not set.
• The ignition is OFF for more than 10 hours.
• The ECT Sensor parameter is between -30°C and +45°C (-22°F and +113°F) at engine start-up.
• The ECT Sensor parameter minus the Intake Air Temperature (IAT) Sensor parameter is less than 140°C (252°F) at engine start-up.
• The engine is started.
• DTC P0141 runs the heater resistance test once per drive cycle when the above conditions are met.