2007 Mazda5 Multiple OBD2 Codes P2196, P2-187, P0455, P0131 - How to Diagnose and Fix Without Dealership Costs

Model: 2007 Mazda5 Fault Code: P0131 Posted: 2011-08-01 07:16

My 2007 Mazda5 has been acting up recently — it won't start unless I fully depress the accelerator pedal while cranking. Once it starts, it runs roughly for a few seconds before stabilizing. This behavior only occurs after refueling. After checking with an OBD2 scanner, I'm seeing multiple fault codes: P2196, P2187, P0455, and P0131. These codes are quite common in this model year, but I'm unsure where to begin troubleshooting. I've heard a lot about the purge control valve being a potential culprit, especially with fuel system issues. However, none of the diagnostic codes directly point to a purge valve failure. Could a faulty purge valve be causing these multiple errors? Or are these codes more likely related to other components like the oxygen sensor or evaporative emissions system? I'm trying to avoid taking it to the dealership, where I've heard they often give long delays and high repair costs. Can anyone recommend a cost-effective way to diagnose and fix this issue using common tools and parts? Any real-world experience with these codes on a 2007 Mazda5 would be greatly appreciated.