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Home >> Chrysler >> 2011 >> 300 C, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 436 (6.7L Diesel - DTCS P2299 To U3017 - 2500 Hd & 3500 Hd) >> Diagnosis And Testing >> U1421-Implausible Ignition Key Off Time Received >> Theory Of Operation >> Set Condition

Set Condition

WARNING: This page is about a different car, the 2013 RAM 3500 HD and 2013 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

If the difference between coolant temperatures at the previous ignition off and next key on is greater than -12.2°C (10°F), and the ignition off time was less than two minutes, the Powertrain Control Module (PCM) increments a fail counter of one. If the fail counter reaches 16 counts, a DTC is set. This is a non-MIL lamp 1 trip fault.

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