Conditions for Running the DTC: P0135

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

DTCs P0068, P0101, P0102, P0103, P0106, P0107, P0108, P0112, P0113, P0116, P0117, P0118, P0120, P0121, P0122, P0123, P0125, P0128, P0201, P0202, P0203, P0204, P0220, P0222, P0223, P0442, P0443, P0446, P0449, P0455, P0496, P1516, P2101, P2119, P2135, P2176 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.
The Engine Run Time parameter is more than 300 seconds.
The Engine Speed parameter is between 500-3,000 RPM.
DTC P0135 runs the heater current test once per drive cycle when the above conditions are met for 120 seconds.