Question about Saturn SL2

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Saturn SL2 "Service Engine Soon" light flashes

I have had the ECM or (ECU) replaced because that is what the code originally said the problem was. Well to replace it cost be over $500 and I am still having problems. I have been back to my mechanic twice, the first time the car wouldn't start so he had to replace the new ECM with the old one to get the car to the garage. In order to disconnect this he needed to disconnect the battery and hence lost the code he said. He then put the new one back in and had the car for several days driving it with now problems. When I got it back home it sat for a few days, I used it once with no problems, then the second time, when shifting into 3rd gear the car hesitated when I gave it gas, then there was no throttle response at first then very slow. I got it to work, and a few hours later it got me home without any problems. Then my son drove it and had the same throttle repsonse problem and he said it seemed to be missing on a cylinder. My mechanic says these problems are not uncommon with OEM ECMs, but I cannot drive the car like this, any ideas?

Posted by Anonymous on

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  • Saturn Master
  • 20,221 Answers

As the old ECU worked I doubt it was faulty.
Get an auto electrician to check the wiring.
An ECU will not give a code for its own fault!

Posted on Mar 06, 2017

6 Suggested Answers

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  • 2 Answers

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: Misfire

One question, have you replaced the ECTS (Electronic Cooling Temperature Sensor)? These cause no end of different seemingly unrelated problems on Saturns. Peice is about ten bucks and is an easy install. Just search on youtube for a how-to video. Even if that's not the problem it is reccommended to replace this peice just the same as they ALL end up going bad at some point.

If that's not a fix, start pulling plugs. Check to see if they're correctly gapped and if they have any damage/corrosion. If you're running Platinum plugs, immediatly change to a copper plug as Platinums have no place in these motors. Most people have the best luck with NGK copper.

Check to make sure that your plug wires haven't been crossed. This sounds like a plug or wire issue most likely so it has to be in that family, if the plugs are good, wires good and not crossed, sensors are fine, then time to replace your coil packs. If you've replaced everything up to the coil packs then that is most likely the cause of your dillema.


Posted on Oct 25, 2008

  • 2 Answers

SOURCE: 99 saturn sl2 has lost reverse

Last time this happened to me Saturn replaced valve body in tranny, this can be easily done at home if you are handy

Posted on Nov 24, 2008

  • 72 Answers

SOURCE: Service Engine Light in 2001 Saturn SL2

Depending on the code. Let me know what the code is, and I will tell you what it affects, and how serious it is.

Posted on Jun 25, 2009

  • 1348 Answers

SOURCE: Engine won't start. Dash lights flash rapidly when key turned.

the battery says 12 volts but may be dropping to 4 or 5 under a load...i would suggest jumpstarting the car and see what happens.the battery should read in the high 12 volts and not less than 9.5 under cranking. the dash lights go out on your car when starting,and the alarm will go off ,and disable the ignition if the voltage is too low in cranking the car because the computer will shut it down and activate the anti theft.....check your battery posts are tight. best of luck

Posted on Jul 22, 2009

Jta91
  • 99 Answers

SOURCE: Jerks going into 3rd Gear

You the beginnings of what is known as the reverse slam. If caught early enough it is fixable. However, most times a rebuilt valve body is in order. I do it for around $200. For the record any late 1992-2002 valve body will work, those are the type II. Type I won't work and is 1992-early 1992 years.

Posted on Jul 30, 2009

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1992 saturn sl2 will run if service engine light comes on when turning key to start car. when it does start and run if the service engine light flickers or comes on the fuel pump relay will click and car...


This may just be a problem with the wiring of the car's ECU. It could be a loose wiring. The ECU may be receiving power intermittently. It could also be just an issue with the EFI relay. The ECU signal from the EFI is intermittent causing the flickering and the clicking sound.

Jun 06, 2011 | 1992 Saturn SL2

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I have a 1999 Saturn SL2 that has a check engine light on and the code is P0401 I have checked the egr and had the passage way cleaned replaced the catalytic converter and map sensor whats next


If replaced everything you have to reset your ecm" computer" This will clear out the codes that was showing. If there is still a problem it will comeback up. To do this corectly might run by a dealer, Shoulnt cost just a few bucks. Good luck to you.

Apr 04, 2011 | 1999 Saturn SL

1 Answer

Error code 1680


Chevrolet OBD Fault Codes
DTC P1680 - Driver 5 (ECU malfunction)

This is any internal ECU problem (ECU = ECM = PCM device); check other details HERE; keep in mind that its possible that you have to reprogramm the ECU.

Here is a bulletin for this problem.Subject: Service Engine Soon Light On, P1680 (Reprogram or Replace PCM)

Models:
2004 Buick Rainier
2004 Chevrolet Trailblazer
2004 GMC Envoy
2004 Oldsmobile Bravada with 4.2L Engine (VIN S - RPO LL8)

Some customers may comment on the Service Engine Soon Light coming on. Upon investigation, the technician may find a P1680 diagnostic trouble code Check the resistance of the accelerator pedal position sensors using the procedure in the appropriate Service Information for DTC P1680.

If the resistance of the accelerator pedal position sensor is within the specifications shown in the Service Information and the vehicle was built prior to the following VIN breakpoints, then reprogram the PCM with the latest calibration.

If the resistance of the accelerator pedal position sensor is within the specifications shown in the Service Information and the vehicle was built after the following VIN breakpoints, then replace the PCM. If the resistance of the accelerator pedal position sensor is outside the specifications shown in the Service Information, then continue with the diagnostics for DTC P1680.

VIN Breakpoints
• Vehicles built at Oklahoma City Assembly Plant - 46192755
• Vehicles built at Moraine Assembly Plant - 42315833

Hope this help

Aug 03, 2010 | 2004 Chevrolet TrailBlazer

2 Answers

Engine control computer needs to be replaced


Always disconnect the battery before replacing any computer parts.
And yes mileage should get better.

Jun 05, 2010 | 1993 Saturn SL2

1 Answer

Service light comes on in about 30 seconds in a saturn sl2


Go to SaturnFriendsForums.com it's a great site with a WEALTH of info on saturn specific problem solving.

In the mean time have auto zone or other parts place read the codes for the service light,

MOST problems are caused by a bad water temp sensor on the right side of the engine down low ( looking at it from the front of the car ) it's called the ECTS sensor, get a BRASS one from auto zone for $8.00 it will solve a lot of problems that there may not be a code for.

Mar 29, 2010 | 1996 Saturn SL

1 Answer

WHY IS THE SERVICE ENGINE LIGHT ON IN MY SATURN??


The Check Engine light will light when the ECU stores a trouble code.
Counting the Flashes
To retrieve trouble codes, turn the ignition key to the "on" position with the engine OFF.
The Check engine light will flash many short blinks. The total number of blinks equals the code number. For example, flash,pause, flash,flash = code 12.If more than one code is stored, the Check engine light will flash the codes in sequence (lowest to highest) with a pause between each code. The codes will repeat until the key is turned to the OFF position.

11 Transaxle codes present 12 Diagnostic check only 13 Oxygen sensor circuit 14 Coolant sensor/high temperature 15 Coolant sensor/low temperature 17 PCM fault - pull-up resistor 19 6X signal fault (92-95 models) 21 Throttle position sensor-voltage high 22 Throttle position sensor-voltage low 23 IAT circuit low 24 VSS circuit-no signal 25 IAT circuit-Temp out of high range 26 Quad driver output fault 32 EGR system fault 33 MAP sensor - voltage out of range high 34 MAP sensor - voltage out of range low 35 IAC - rpm out of range 41 Ignition control circuit-open or shorted 42 Bypass circuit - shorted or open 41/42 IC control circuit grounded/bypass open 43 Knock sensor circuit shorted or open 44 O2 sensor indicates lean condition 45 O2 sensor indicates rich condition 46 Power steeringpressure circit(91 models)open or shorted 49 High idle indicates vacuum leak 51 PCM memory error 53 System voltage error 55 A/D error 58 trans fluid temperature too high 59 Trans fluid temperature too low 66/67 A/C pressure sensor 81 ABS message fault 82 PCM internal communication fault

Mar 10, 2010 | 1992 Saturn SL2

1 Answer

Service Engine Light in 2001 Saturn SL2


Depending on the code. Let me know what the code is, and I will tell you what it affects, and how serious it is.

Jun 25, 2009 | 2001 Saturn SL

1 Answer

Saturn '99 SL2 erratic tickover on idle


Idle problem most likey a Coolant Temp sensor & connector.Cam covers very common to leak around the sides & down into the spark plug holes.Also all saturn s-series 1.9 engine consume oil.Most 1qt. per 1500 miles some more some less.Service Engine Lamp has nothing to do with regular maintenance.It's a malfunction indicator lamp.If it's on there is Trouble codes stored in the ECM.Auto zone free scan with printout.Hope that helps

May 12, 2009 | 1993 Saturn SL2

1 Answer

2001 Saturn SL2 won't stay running until it warms up


I would take it to autozone to have the code read. It could be your idle control sensor, or it could even be O2 sensors. Hard to say without knowing the code.

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