I have a 2001 saturn sl1 and the check engine light came on today. When I took the car in this afternoon the codes were p0341, p0442, p1599, and p1620. I tried replacing the gas cap, the car is not overheating/dying, no funny noises, and the gas mileage is fine. I'm at a loss as to what could have caused all these codes at once.

P1406 SATURN 5,974 Views EGR Valve Pintle Position Circuit

Read more: https://www.autocodes.com/make/saturn/13
P1599 SATURN 21,379 Views Engine Stall Or Near Stall Detected

Read more: https://www.autocodes.com/make/saturn/13
both codes point to needing a new EGR valve

Having codes read is a waste of time, if you don't understand
or work on vehicles

You need a shop to properly diagnose it,you know that

Any codes can be Googled to look them up

Type: OBD & the code

Codes have little to do with replacing parts

No parts get replaced until they are tested & fail a test

Need a different mechanic

They never tested anything,
if you got codes

Resetting the computer isnt going to fix anything. Get it repaired. If you reset it, it still will not pass if the monitors have not run and passed.

CPS is bad

p1599 refers to TPS (throttle position sensor) Stop by a local parts store (Advance, Autozone, etc) and have them do a free fault scan for you.

Hello ihatethiscom: My name is Roger and I will help you. The code p0341 Is for the camshaft position sensor There are several things that can cause the code. A intermittent engine misfire to a camshaft sensor problem. I always look for the simple problems first. A lot of people look at the sensor as being the problem not always so. As for the code p0442 this is a fuel evaporator system problem. This has several options when it comes to finding a solution. As I said try to look for the simple solution. A loose fuel cap can set this code also. A dirty fuel vapor canister or a cracked vapor line could cause the code also. What the code is saying is there is a small vacuum leak to the fuel tank. Should you need further help please just ask. Please rate the answer you received. Thank You for using Fix YA. Roger

P1599 IS A STALLING ISSUE COULD BE BAD GAS / BAD FUELPUMP DIRTY FUEL FILTER
DISCONNECT BATTERY AND SEE IF THE LIGHT COMES ON AGAIN
U2107 HAS SOMETHING TO DO WITH THE COMPUTER LOOSING POWER AT THE BODY MOUNTS CHECK CABLES AND GROUND STRAP

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.

Replacing plugs and wires is the correct soultion for a p0341 on an S-car. However the trans shifting hard is another common problem that the s-cars have which is your valve body on your transmission and the Input shaft nut will eventually need to be replaced as the problem will get worse. as far as the Ignition module. It is actually called an Ignition Control Module. Maybe they were saying controller and referring to that. I hope this helps.