Question about 2006 Saturn L300

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2003 Saturn L300 indicator lights stay on: ABS, SES...etc

I took my car 2003 Saturn L300 V6 in for service, as the SES light was on. Went to auto zone and there were several codes..O2 sensor, Coolant sensor etc. Don't recall codes. Had both replaced. SES light still showing coolant sensor code. Took back to mechanic to check. Shortly afterwards, ABS light started coming on. I noticed when the light comes on, all the indicator needles flip to left...fuel goes to empty, speed to zero etc. Then it goes back to correct setting. This flipping occurs constantly. Emerg Brake light stays on for awhile after releasing it.etc. All kinds of issues on the indicator panel. Now I noticed my horn is weak. Dealer suspects computer problem but will diagnose for $95/hr. Usual Mechanic cannot figure out what's going on. Sound familiar to anyone???

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First problem, went to autozone. the guy that looked at your car was making pizzas last week. they pull codes and sell you every part you will buy. take the car to the saturn dealer and replace the bcm.

Posted on Apr 09, 2009

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2003 Nissan Altima 2.5L Service Engine Soon Light is on, Auto Zone says codes are for MAF and O2 Sensors. Car hard to start after driving a while but when starts appears to run smooth. Auto Zone thi


ok lets start with the codes they say your getting. P??? which 1's and how many. there are few o2 sensors, are they next to the Exhaust next to the converter? MASS AIR FLOW -MAF use this, for now i am guessing, until i see the correct codes your are getting. this could be the 1 you may have below, please read it........
  • P0103
    Mass Air Flow Sensor Circuit High Input
  • Possible causes
  • Faulty mass air flow sensor
    - Intake air leaks
    - Dirty mass air flow sensor
    - Dirty mass air filter
    - Mass air flow sensor harness is open or shorted
    - Mass air flow sensor circuit poor electrical connection
  • Before replacing the mass air flow sensor, try replacing the air filter and cleaning the air flow sensor with low compress air or mass air flow sensor cleaner. Reset code and drive vehicle. If the code comes back, it may be necessary to replaced the mass air flow sensor.
  • possible symptoms Engine Light ON (or Service Engine Soon Warning Light)
    - Engine stall
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2003 NISSAN Altima Sedan OBDII Codes List

Oct 22, 2014 | 2003 Nissan Altima

2 Answers

P0137


There are several things that could be wrong. The problem with an Auto Zone scanner is that it's just a code reader. You'll need to troubleshoot the engine. Start by looking for a vacuum leak. Are the fuel and air filters clean? How about plugs and wires?

Apr 16, 2014 | 1999 Saturn SL

1 Answer

My SERVICE ENGINE SOON light came onAGAIN!


Disconnecting the battery should reset it but I would bet that the light will come back on. I would have a auto parts store read the error code for you. They can also reset it. There are two o2 sensors on this car one on the manifold and one down stream from the converter. If you are getting an o2 error code it could also be the converter.

Apr 14, 2013 | 1996 Saturn SL

1 Answer

P0420 code



Trouble Code: P0420

Catalyst System Low Efficiency (Bank 1)
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Air leaks at the exhaust manifold or in the exhaust pipes Base engine problems (i.e., high engine oil or coolant usage.) Catalytic converter is damaged, contaminated or it has failed. Continuous engine misfire conditions, or weak or low coil output. Front HO2S or rear HO2S is contaminated with fuel or moisture. Rear HO2S is loose in the mounting hole (check it for a leak). Front HO2S older (aged) than the rear HO2S (HO2S-12 is lazy) .Here is what is listed in the Saturn repair guide.

Aug 29, 2012 | Cars & Trucks

1 Answer

I just need detailed instructions (as best as can be given in words) on how to change the upstream oxygen sensor on a 2003 Saturn Ion.


That is the sensor in front of the cat converter, either use a 7/8 combination wrench or a o2 sensor wrench . unplug it screw it out. (may need to soak threads w/liquid wrench) Install new sensor. If SES light is on go to Auto Zone. Advance auto to have codes cleared, they normally don't charge.

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2 Answers

SATURN OF KNOXVILLE SAID THAT THEY ARE SWAYING TO THE COMPUTER OF THE CAR BUT WHEN I WENT TO AUTO ZONE THEY SAID THE DIAGNOSTIC SAID IT WAS THE O2 SENSOR. SATURN ALSO SAID WHEN THEY STARTED THEW CAR UP IT...


I would trust the dealer over Autozone if they experienced these problems. However, if the car is running an the O2 sensor code was stored, go for that first.

An O2 sensor will not cause a driveability problem until the car is warmed up as the O2 sensor doesn't come into play until the exhaust is good and hot.

If the car cranks but dies on them when cold, then it's the crank sensor or computer in that order.

Good luck to you.

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2 Answers

1996 saturn


the ses light might just be a speed sensor in the hub, and the wrench means service engine.

Dec 21, 2009 | 1999 Saturn SL

2 Answers

SES light (again!)


P0440 code is EVAP control system problem.This has to do with emissions from the carbon can, fuel tank and general leaks that come from fuel evaporation. Anywhere gas fumes can escape the systerm. This code is very common and can be caused by a simple fuel cap being loose or leaking. Check the fuel cap and reset the coputer. If the SES light comes back on there could be a problem with some of the systerm controls. ie vent valve,purge valveand canister. And /or vac leaks.

May 26, 2009 | 2003 Saturn VUE

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