2002 Saturn L200. TROUBLE CODE P1599. What does this mean? How do I fix it?

https://www.engine-codes.com/p1599_saturn.html

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2002 saturn l200 headlights and dash lights blinking - Saturn ...

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Mar 6, 2013 - My wife told me that on occasion the headlights and the dash lights willblink when she lets off the. ... 2002 saturn l200 headlights and dash lights blinking.... 2000 LW2 dash lights Inop, spotts56, Saturn L Series Sedans & ...

Saturn l-300 wagon has flickering lights - Car Forums at Edmunds.com

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My wagon 2003 l-300 has flickering lights and when the radio is off you can hear the ...My Dad has a 2002 Saturn Lw series wagon. the transmition has been ...

why a green light always keep flashing when running? - SaturnFans ...

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P1599 - means that the computer detected that the engine stalled when the ignition had not been turned off.
Does your vehicle have a stalling problem?

P2138 - is the Accelerator Pedal Position Sensor 1-2 correlation.
The accelerator pedal has a sensor and the throttle actuator has the one as well. the computer expect thats both sensor will read the same as the accelerator pedal is operated. If one sensor read differently from the other the computer will set this code.

Long story short, you'll have to have shop to check this code out for you since a scan tool will be needed in the diagnosis of this code.

Before you replace the sensor, you should check the voltage circuit for the heater. The sensor may be fine and not getting voltage to the heater inside.
The code 1599 just means the engine has stalled at some point. It does not tell you why or how.
I doubt the two codes are related.

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.

P0410 Secondary AIR System Performance

P1599 Engine Stall Detected

Leave it to GM to use a computer code to tell you your engine died. The AIR system was a mistake they felt like was best corrected by continuing to use it. The system is similar to EGR function where it injects air into the exhaust for emissions. When it screws up, and it does often, it makes the car run horrible and is usually expensive to fix because the parts are hard to find. I would call a local GM dealer, give them the codes and see what they estimate the cost to fix it is. You might consider trading it in after that.

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

Is there ANY Power to Anything? It could be the Battery going Bad or Even Just a Loose Battery Cable.

Tighten the battery connections with a wrench, not pliers!
Loose battery problems are a common problem with GM side mount terminals. They need to be very tight to work right.

Happened to me before too! No power, no lights, no radio, no crank.