I have a 2001 saturn sl1 and my check engine light came on today, and when I took it to get read it came up with the following codes.. P1620, p1599, p0442, and p0341. I tried replacing the gas tank cap (it was a possibility with one of the codes and I knew from previous experience this sent codes haywire) however, that didn't seem to help. The car is running fine, the gas mileage is fine, no funny noises, and it's not overheating/dying on me which I read others had experienced. I am at a loss as to what could be causing all of these codes to go off at once.

SOURCE: my car wont start my mechanic put it on machine

ok now for starters, we will go with the most probable:P0341 crank position sensor. chances are it needs to be replaced. 2nd your check engine light has probably been on for a while right?! the P0133 is an o2 sensor code and would probably be good maintenance(but get it to run first. 3rd P1599 refers to it stalling out which if it died while running would most likely trigger this. and last but not least either your coolant level switch is faulty or you really do have low coolant. let me know.

Arnie Burke

• 7339 Answers
• Posted on Aug 30, 2011

SOURCE: how to reset computer on

the 02 sensor----camshaft position sensor and evaporative emmisions has small leak----the 2 sensors are dirty or wornout------emisions tank near gas tank shud be inspected-----ull get better gas miles when fixed----------codes will not disapear until then