mY 91 hatchback is trowing out the Baric metric pressure code. Its has the stock engine. Anyone knows what that problem is????

 

Code 13 - Atmosphric Pressure Sensor

The PA sensor should read close to the MAP sensor of 2.75v, this may very small amounts due to current weather conditions and elevation. Due to it's location, it is probably easier to check the voltage at the ECU. This sensor vary seldom, or never at all should fail. Flooding may have damaged it, at one time or another.

 

You think it could be cause my fuel pump, cause i have a 1.8 ls pump and my engine is a 1.5

 

Nope not at all