Question about 2003 Saturn L-Series

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2003 saturn l-series l300..I replaced throttle body and was still getting reduced power and started blowing controls b 10 amp fues when key was on so i traced it to the ecm/pcm. Replaced it and then did the passlock relearn and now when i start it the rpms go straight to 4000-4500 and dont go below 3500

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If you replaced the ECM and it idles at 3500-4000 RPM, the most likely problem is that the throttle body is not able to re-learn. The most common problem is that the APP, (accelerator position sensor), is above 14%. The throttle body will not learn if the APP senor is above 14%. When you turn the key on engine off during the throttle position re-learn, you will notice that the first second it will click, then after 29 seconds it will click again and finally it will click again after 1 min. Before you try and attempt a throttle re-learn, make sure your scanner says that your throttle is closed, with a "YES" value for idle.

Posted on Jan 17, 2014

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Disconnect the throttle body wire and restart,ECM replacement?Do you still have the old ECM?I belive the problem may not have resided in the ECM,When you get a reduced power its doesnt mean a bad ECM The purpose for reduce power is to protect the catalytic convertor,If there is a fault detected in the APP1 or the APP2 a reduce power is ordered.What mediates this is the TPS sensor APP1 goes high and APP2 goes low,If you have a 2003 ECM or saturn this is not a drop in ECM.Your particular year is CAN,means you need to flash it.

Posted on Nov 05, 2012

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Posted on Jan 02, 2017

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Sounds like you have a fuel leak draining the presure in the rail. Check for a bad injector or fuel presure regulator.

Posted on Oct 04, 2012

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SOURCE: Saturn L200 Passlock Problem

I have a very untechnical solution to this problem and I can't for the life of me remember where I heard it but it sure does work. Turn the igniton to ON so that the dash lights up. Eventually the others lights go out and the flashing "Securty" light stays. Keep the driver side door slightly ajar and sit and wait for that Security light to stop blink, usually 5-10 minutes. Once it stops blinking you can start your car. I can't promise that you won't have the starting problem again, but it will happen with decreasing frequency. Ultimately you need to have the passlock issue handled at a dealership. I say DEALERSHIP because it's a manufacturer flaw and they should be made aware of this issue everytime. They're also best equipped to handle it.

Posted on Aug 24, 2010

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SOURCE: 2007 saturn ion passlock light off after relearn sequence failed

You are going to need the dealer unless you used the correct ignition switch, hope you have the old key,.

Posted on Oct 22, 2012

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L300 Saturn 2003 trying to replace my throtter sensor. Can't figure out where to start from. Have no idea where's it located.

Your vehicle has electronic throttle control an the Throttle position sensor's are internal to the throttle body assembly ! Your vehicle has two throttle position sensors .
Throttle Body Assembly
The throttle assembly contains the following components:
?€¢ The throttle blade ?€¢ The throttle actuator motor ?€¢ The throttle position (TP) sensor 1 and 2 You have to replace the Throttle Body Assembly !
Disconnect the negative battery cable. Remove the inlet hose assembly from the throttle body. Disconnect the throttle body electrical connection. Disconnect the hose clamps from the plenum-to-runner connector using theJ 43914 .
Remove the intake plenum bolts. Remove the EGR passage bolt. Rotate the plenum up and remove the throttle body coolant hoses, EVAP hose, and vacuum line from the throttle body.
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I have 2003 rodeo the check engine light and reduced power came on then reduced power went off. took it in shop, said i need to replace throttle body assembly, at $866.94 total how quick do I need to

If you did actually need a throttle body you could
get it for less than $800 new or get a used one &
install yourself in about an hour.

Only got 4 small bolts holding it on.

The only reason for a throttle body is if it is
drive by wire & you need a tacm motor on it
& that motor is not avail separately

Do some internet research on that issues

I would be looking at fuel pressure at the motor,
fuel trim on a road test, oxygen sensors, ignition
issues long before I got stumped & ended up at the
throttle body

If it is has a motor turn on the key & have someone
slowly push the gas pedel

If the throttle plate opens & then snaps closed,not
the problem

Also consider a gas filter that has been never changed in
10 years or a blocked exhaust converter or exhaust leaks
before the converter effecting fuel adjustment

Need to know in detail what was tested & how by that shop

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1 Answer

Body control module for 2003 saturn l300

the body control module or BCM is located on top of the inside of the glove box,remove the lower trim panel under the passenger foot well under the glove box,the the 4 screws that hold the glove box door on,,,then the screws that hold the box to the dash and the BCM is slid into the top of the box,,,,,,you are gonna need it programmed as it comes new blank,and the car will not start with out a program

Feb 22, 2010 | 2003 Saturn L-Series

1 Answer

2003 Saturn L300 Air Conditioner Does Not Blow Cold Air

I worked at saturn dealer for 18yrs.Those auto hvac heads are a weak link on the L-Series.But I have to say the BCM's are totally junk!! But if it was me I would go with the BCM because you can get a used HVAC head from junk yard but the BCM has to be new because it has to be flashed.If It was me I would try to get a used hvac control from salvage yard.Also yo might want to get a 2nd opinion because those L-Series cars are all bad for Compressor concerns.Hope this helps

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03 saturn L300, reduced power engine light came on

You are not the only one. Ive met a good many of Saturn owners (most were 2001 L300 drivers) but they were plagued with the problem you have and practically identical codes. The following remedies have been known to work:

1. Replacement Battery Cable
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Reduced power light came on

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Mar 21, 2009 | 2003 Saturn VUE

1 Answer

2003 Saturn Ignition and Security System Troubles

Sorry to say but it's probably the BCM (body control module) that's going in her car. The BCM controls everything inside your car, from the gauges, locks, daytime running lamps, ABS... and yes the security system. I have a 2003 L200 which had the same problem and I had to replace the BCM at some cost ($400-$600) depending on where you go. The L-Series Saturns seem to have a problem with their BCMs and it seems that it's pretty prevalent. Unfortunately it will only get worse as time goes on and it's not something that you can do yourself as it needs to be programmed by the dealer. You also will need to get your remotes reprogrammed as well with the new BCM. Hope this helps.

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