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P1400 Diagnostic Trouble Code Discussion for March 2023

Cold Start Emission Reduction Control System

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Trouble Ticket Help Requests for DTC P1400
Help Request Posted
2009 Chevrolet Suburban 1500 LT 5.3L Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, Misfire VIN: 1GNFC260X9
P1400: Cold start emission reduction control system. ... After about 2 minutes at the most, it runs fairly normal. No codes, other than the P1400. The scan tool readings look normal, doesn't set codes when running.ALSO!!! it has a aftermarket supercharger!This has been on it for 10 years, so it has been wor...
March 10, 2023