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L300

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Question
car not starting errors
The fault codes need to be read out of the various vehicle control modules to determine the scope of issues that need to be corrected. Faulty sensor inputs can lead to a series of malfunctions, some of which could compromise...
Question
cv axel not fitting
The axle bore in the transaxle needs to be checked for debris, burying, or a damaged locking ring that could be preventing the axle from fully inserting into the transaxle axle bore. Also, replacement axles are generally refurbished from...
Question
sluggish not much power
A clogged catalytic converter can increase exhaust system pressure robbing the engine of power. Along with this overheating, excessive fuel consumption can also occur. The exhaust system pressure should be checked and compared to specification to ensure the catalytic converter...
Question
what is the black box with three plugs that is under the dash on the drivers side.
It sounds like you are describing the BCM (Body Control Module). It usually has 3-4 connectors. Saturn vehicles are unique. Like many vehicles, there are not any other vehicles that I know of that you can use for parts....
Question
I'm having electrical issues and now my car won't start, it will crank but not star.
All of these problems are most likely not related to each other. The no start is the most serious and may be due to the fuel pump or ignition module not working. You will need to have the vehicle scanned...
Question
ac control dont have power
Hello. Thanks for writing in about your 2003 Saturn L300. If the control unit for the AC system does not have any power, then I usually check the fuse first. If the fuse is blown, then that fuse needs to...
Question
Reduce power light is on
What problem codes are set? Most often, these symptoms are the result of a failed throttle position sensor. Traditionally, cars will have a throttle cable but your Saturn has a "fly by wire" throttle system. If the engine management system...
Question
Car won't start and shakes while turning the key - 2003 Saturn L300
Hello. These lights can mean that there is a serious issue going on or that there may be an electrical malfunction. I usually check and see if there is oil pressure and check to make sure that the charging system...
Question
Car wont start
The symptoms you describe sound like the fuel pump stopped working and the engine doesn't have the fuel pressure it needs to keep running. Have the fuel pressure checked to see if the fuel pump is not pumping fuel to...
Question
Suspension in left rear lower and clucking
If the car is sitting lower than normal, that suggests a problem with the coil spring, or related components including the spring seat, that are actually supporting the weight of the car. Of course, on a flat level surface, you...
Question
Sometimes when driving a wrench light comes on and my car is hard to shift
This may be related to low transmission fluid, or potentially a faulty transmission speed sensor or transmission control solenoid. Every time a gear change is required, the car's computer activates a transmission solenoid, which directs transmission fluid into the valve...
Question
My oil mixed in my resivar with my water and antifreeze in drained nearly every drop of oil into the resivar what does that mean?
Hello, thank you for writing in. Typically oil and coolant mixing is caused by a blown head gasket. Now, if there has been an ongoing coolant leak which caused the vehicle to overheat, the head gasket may have blown then....
Question
Where is the Mass AirFlow (MAF) sensor located on this car? 2005 Saturn L300
Hello - the mass airflow (MAF) sensor is the black plastic cylindrical tube with an electrical harness that goes into the air filter housing on your engine air intake system. I would check for problem codes first however, as the...
Question
accelerator pedal throttle sensor
The vehicle could have a clogged catalytic converter, the fuel filter and/or injectors could be plugged and there are other possibilities in the fuel, ignition, and air induction systems. It is also possible that your vehicle has entered "limp mode"...
Question
Oil on bottom of catalytic converter
Hi there. I completely understand about time constraints and your concern about a potential fire hazard. Many people continue to drive their vehicles even if there is oil on the exhaust components as they usually smolder and smoke. However, the...
Question
2001 Saturn L300 turns over won't start it just stalled out and won't start
Hello, thank you for writing in. When it comes to a stalling issues, you want to turn your attention to the spark and power supply first. It is good you have partially ruled out the fuel supply as the problem....
Question
Traction control not working
Hi There, It sounds like you may have a faulty traction control module. As you know, the traction control system monitors the steering stability of the vehicle and engages when loss of traction has been detected. This is done by...
Question
Driving and the lights on dash go dim and service light comes on and abs then also stopped in another time driving car would not g
Hello, thank you for writing in. It sounds like you are having multiple electrical issues pertaining to several different systems. When this is the case you will want to check into the charging system first. This means the alternator and...
Question
To change the fuel sending unit does the fuel tank need to be dropped? 2003 Saturn L300
YES, the tank has to be drained and removed to replace the fuel pump and/or fuel level sensor. I recommend a fuel level sender replacement performed by a mobile, professional mechanic, such as one from YourMechanic, who will come to...
Question
I went to change the passenger side axle of my 2003 L300 3.0 and got the axle to find out the one in the car was not the same at
If you are not the original owner of the vehicle, it's possible an engine or transmission swap was performed before you purchased the vehicle. Whether this is the case or not, have your parts source check listings for a couple...

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