My check engine light came on the other day, so I took it the dealership and had the codes pulled. It came up with P0203. It had something to do with the fuel primary circuit. They asked me if my car stalled or had a rough start, and it didn't. So they clear the check engine and told me everything was okay. The next day I started my car and drove for about 5 minutes when it start stalling out. Every time I slowed down or stopped at a light it stalled. And it started rough every time I tried to start the car. Any advice to what the problem might be would be greatly appreciated. Fuel pump? Fuel filter?

 

The symptoms for this code will likely be a misfire and a rough running engine. Poor acceleration. The MIL will also be illuminated.
Causes

The causes of a P0203 engine light
code could be any of the following:

* Bad injector. This is usually the cause of this code but doesn't rule out the possibility of one of the other causes
* Open in the wiring to the injector
* Short in the wiring to the injector
* Bad PCM

 

P0203 means injector 3 is bad. P0201 is injector one, and P0202 is injector two, etc.