I've recently had my water pump replaced and not long after, check engine light comes on. I've also started experiencing a frequent stall when accelerating after being stopped. I'm only able to start the vehicle by giving it gas in neutral when this occurs. It just cranks in park. I don't have a scanner but did the 3 key turns and counted the check engine codes: 12, 22, 55. I know 55 is normal. I've seen people say code 12 also is a normal information code about the battery. Its code 22 I'm confused and concerned with. Any advice would be appreciated!

 

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