P1400 Diagnostic Trouble Code Discussion for February 2014
Cold Start Emission Reduction Control System
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| Help Request | Posted | |
| 2007 GMC Envoy SLE 4.2L Poor Idle Quality VIN: 1GKDT13S77 P1400: Cold Start Emission Reduction Control System. sit overnite and start up in morning cold start up idles rough and code comes back after clearing.runs great otherwise.my scanner is showing a possible o2 sensor primary the heated one but need voltage values cold and warm.flashig cat,air eva and o2 sensor the... |
February 24, 2014 |
