I have an intermittant problem with shifting on a '06 ion with auto trans. When the car acts up it shifts very hard and some times stalls when I stop. Also the speedometer drops down when it acts up. When going say 60 mph the speedo will bounce down and back up several times. I have also noted that occasionally the door locks will try to lock when this occurs. I have had twice in the last few days had a dinging occure as if I left the lights on or not buckled my seat belt but no info was displayed on the odometer like oil life or others. This also has generated an engine fault code of transmission slip and torque converter lock.These were accessed by my son inlaw who is a mechanic.

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.

Walter Whitaker

• 25 Answers
• Posted on Dec 03, 2008

SOURCE: Check engine light on,engine surges while stopped at light

could be a vacuum leak. When rpms are up, it has enough vac to operate properly. Check all vacuum hoses and make sure they are all on, and look for splits or cracks in the hoses

SOURCE: Saturn LW200 2001 will start &run then die.

it needs a new bcm,body control module,thats why everything is freaking out and the car is not starting,must go to dealer say $400

Testimonial: "thanks for the info you hit it right on the head "

SOURCE: I own a 2006 L 300 Saturn and intermittently the

well it sounds like a normal 6 cylinder L-series issue,,,the pressure control solenoid inside the transmission goes bad and causes a very hard shift and turns on the light,,,,,, it sets a p1780 code,,,,,you need to replace that solenoid,,,,this is not a do it yourself at home job,,,,,must go to the dealer,,,the trans flush and fill did not having anything to do with this issue,,,,,its a common issue for the 6 cylinder L,,,the 4 cylinder never did this ,just the 6,,,,,probably like at least a $500 or more repair,,parts not much but alot of labor to get to the solenoid,,,,,i rec take to dealer

SOURCE: Involved vehicle: 1999 Saturn SL - 4 cyl, 5 speed

try to reset the computer if that doesnt work reset the idle speed it may have picked up bad codes