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Old 02-04-2014, 01:05 PM   #1
Fermium
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Default SL2 99 check engine light comes code P1404 and P1599

Hi,

I changed my EGR valve for the code: P1404 yesterday but now I found out the car got a new code: P1599.. (drove 10 miles after replaced the EGR valve)

I was searching online and some said: coolant temps sensors / the engine has actually stalled and pointed it to the crankshaft position sensor.

How can I find out what is wrong with my car with code P1599?

P.S. I am a girl and don't really know much about car...except google and youtube search how to fix...I would say the car is running fine...maybe some weird noise once a while....can't describe the noise since heard it a while ago but now its gone.

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Old 02-04-2014, 01:17 PM   #2
BV22
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2002 SC1
Default Re: SL2 99 check engine light comes code P1404 and P1599

P1599 just means the engine nearly stalled. Could have happened just before the EGR replacement or right after while the new valve was making friends with the PCM. If you have a code reader, go ahead and clear the code. If not, open the fuse box under the hood near the battery, remove the fuse named PCM-B for 30 seconds and replace. That will clear the code and turn off the SES light. Drive for a while and see if the SES light stays off.

...
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Old 02-04-2014, 03:57 PM   #3
Fermium
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Default Re: SL2 99 check engine light comes code P1404 and P1599

Thank you for the response!

I will definitely try that!

Will update you guys later!

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Old 02-04-2014, 09:06 PM   #4
jhonky
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1998 SL2
Default Re: SL2 99 check engine light comes code P1404 and P1599

idk if you have an android phone, but for about $28, or potentially less, you can get a baller code reader

elm327 bluetooth reader=$12ish
old android phone(only need android like 2.8, most are 4.x now)= $10ish
torque app= $5

already have an android phone and its under $20

...
98 SL2
5th gear swap- .643 gear
245,000 miles
215/45 17"
I burn about a quart about every 1500 miles.

If it ain't broke, fix it some more.

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Old 02-04-2014, 09:13 PM   #5
satlite440
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2001 SL2
Default Re: SL2 99 check engine light comes code P1404 and P1599

DTC P1404
Circuit Description


The linear EGR system consists of a linear EGR valve, the PCM, and its associated wiring. The EGR valve solenoid is controlled directly by the PCM when certain conditions have been met. The PCM contains a diode feedback circuit which dissipates energy when the valve is cycled OFF. When the PCM commands the EGR valve closed, a closed valve position value is learned. If the PCM commands the valve closed and the actual feedback value does not match the learned values, DTC P1404 will set.

Conditions for Setting the DTCImportant: When the PCM recognizes that the parameters for setting DTC P1404 have been set, the diagnostic software waits until the EGR cycles open 50 percent or greater 4 times and then resets. If after the 3 cycles the actual vs learned is not within the parameters, the DTC will be stored and the MIL, service engine soon, will be commanded ON.

Important: When this DTC sets, functions will be disabled. When repairs are complete, codes must be cleared and the ignition keyed OFF for at least 10 seconds to allow proper operation.

DTC P1404 will set when the actual closed value does not match the learned closed value within 20 seconds if:

•RPM is below 5,000 and the actual vs learned is greater than 0.2 volts.
OR

•RPM is above 5,000 and the actual vs learned is greater than 0.4 volts.
Diagnostic Aids•Check for backed out or damaged terminals.
•Check for a stuck open EGR pintle. Inspect the EGR pintle valve bore for carbon or debris and remove. Verify that the pintle moves freely and the return spring forces the pintle closed.
•An open in circuit 452 will result in DTC P1404.
•A short to ground is circuit 697 will result in a severe rough idle and driveability complaint and set a DTC P1404.
•Compare the learned closed pintle position to the actual closed pintle position with the key ON and the engine OFF. If voltage differs more than 0.15 volts, check for backed out, damaged, poor terminal tightness, or an intermittent open in circuits 416 or 1456.

...
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