WHAT DOES CODE P1400 MEAN?

Customer Concern: Repeat Powertrain Control Module (PCM) code: P1400. The vehicle runs OK otherwise. Tests/Procedures: 1. Check that the Engine Coolant Temperature (ECT) sensor and the Intake Air Temperature (IAT) values match on cold start. 2. Check for intake manifold leaks on cold start. 3. Check for air duct leaks. 4. Check condition of the air filter. 5. NOTE: The air filter must have the same predicted air flow that the Original Equipment Manufacturer (OEM) filter had. 6. Clean the throttle bore. 7. Clean the Mass Air Flow (MAF) sensor elements.

DTC P1400: Cold Start Emission Reduction Control System Circuit/System Description The catalytic converter must be warmed to efficiently reduce the emissions. The cold start strategy is to reduce the amount of time it takes to warm the catalytic converter. During a cold start, the engine idle speed is elevated and spark timing is retarded to allow the catalyst to warm quickly. This diagnostic monitors the following to build an exhaust energy model There is a company that independent auto repair shops get their information from, this same information is available inexpensively for people that work on their own cars.. The information is year make and model specific, covering repair procedures, torque specifications, fluid capacities and specifications, service bulletins, component locations, wiring diagrams ect.... Alldata is very easy to navigate http://bit.ly/AllData_Repair_Manuals_Online