Conditions for Running the DTC
WARNING: This page is about a different car, the 2004 GMC Sierra and 2004 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Heater Current Test
- DTCs P0101, P0102, P0103, P0106, P0107, P0108, P0112, P0113, P0116, P0117, P0118, P0121, P0122, P0123, P0200, P0300, P0442, P0446, P0452, P0453, P0455, P0496 are not set.
- The ECT Sensor parameter is more than 50° C (122° F).
- The Ignition 1 Signal parameter is between 10-18 volts.
- The MAF Sensor parameter is between 3-40 g/s.
- Then Engine Speed parameter is between 500-3,000 RPM.
- The Engine Run Time parameter is more than 120 seconds.
OR
Heater Resistance Test
- DTCs P0101, P0102, P0103, P0106, P0107, P0108, P0112, P0113, P0116, P0117, P0118, P0121, P0122, P0123, P0200, P0300, P0442, P0446, P0452, P0453, P0455, P0496 are not set.
- The ignition is OFF for more than 10 hours.
- The ECT Sensor parameter is between -30° C to +45° F (-22° C to +113° F) at engine start-up.
- The ECT Sensor parameter minus the IAT Sensor parameter is less than 8° C (14° F) at engine start-up.
- The engine is running.