2006 Pontiac G6 transmission speed sensor

Tiny
BLAKESWIFE18
  • MEMBER
  • 2006 PONTIAC G6
  • 131,000 MILES
Hello, let me start by saying I do love my car! Ok we took a trip to the beach about a month ago which was about 3 hours away. On the way home I was driving on the interstate about 75 mph and tried to pass someone the car would just revive up and not go any faster. As I tried getting off the interstate to stop and check things out every time I pressed the gas it would to me like hesitate with slight jumping maybe, not sure if that's the best description sorry. Ooh wait I forgot the day before we left we had gassed up noticing my wonderful husband had stripped the gas cap leaving it stuck and having to be pried off! Not sure if that caused any damage or not. So after exiting the interstate we found the closest auto parts store which I then explained to the man about the gas cap he of course suggested we buy a new cap. We drove home and my car still was acting terrible. The check engine light never came on either. After getting home we changed the plugs and wires, cleaned the air filter, checking all fluids didn't change anything.

I had noticed my car had a rough idle burning a lot of gas and jerking real hard into first and second gear sometimes a few months a go before taking it to the beach. We had taking it to gm and they suggested a transmission flush and a few other things which had cost 500$ all together! The car seemed to be running a little better without the rough idle but was still only sometimes jerking into first and second gear. Sometimes the traction control light would come on as if I had turned it off.

So since the beach trip the car has not been the same at all. Burning a lot of gas. I never have problems starting it in the morning or anything. It always starts right up and goes. It when I'm at a good speed it will sputter or hesitate while accelerating. Some days it wont do it at all.

Someone told us to change the crankshaft sensor. While doing that we noticed a sensor with a broken or missing clamp for the wires and some of the wires were missing the protection tape stuff on the other part of it. Took it out noticing it was covered in black old oil or grease looked like. Wiped it off and put it back. After looking up that part I'm pretty sure its the transmission speed sensor. It was in the transmission.
That same day we went visit a friend. The car ran the same way just shitty with no change at all. When we left the car went into what seems to be limp home mode! Its not shifting at all wont go over 30 mph also making crazy noise.

. Thanks in advance :)
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Tuesday, October 22nd, 2013 AT 8:36 AM

8 Replies

Tiny
JDL
  • EXPERT
Is this a manual tranny? Did you replace the speed sensor? Is the wiring and wiring connector ok? I check for applicable trouble codes, anyway. Some of the national brand auto stores will check codes for free. You may have more than one problem? What is liter size of engine?
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Tuesday, October 22nd, 2013 AT 9:22 AM
Tiny
BLAKESWIFE18
  • MEMBER
Its an automatic transmission and 3.9 engine. No we put the same one back in we cant find a part store with the sensor and wires together
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Tuesday, October 22nd, 2013 AT 10:06 AM
Tiny
BLAKESWIFE18
  • MEMBER
How many speed sensors are there on a 2006 Pontiac g6 gtp 3.9? Is there anyway of checking them? Looking online I have seen there are vehicle speed sensor and wheel speed sensors are they the same thing or totally different?
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Tuesday, October 22nd, 2013 AT 11:10 AM
Tiny
JDL
  • EXPERT
The wheel speed sensor is part of the ABS system. Some makes and models, the wheel speed sensor is part of the hub assembly, if that is the case, you would need a new hub assembly to replace that sensor.

Rockauto online is automotive parts catalog. They have a connector for the vehicle speed sensor. I didn't notice the price, you'll just have to look at it.

In the picture, #10 is location of vehicle speed sensor
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Tuesday, October 22nd, 2013 AT 1:40 PM
Tiny
BLAKESWIFE18
  • MEMBER
Cool thanks
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Tuesday, October 22nd, 2013 AT 2:04 PM
Tiny
JDL
  • EXPERT
Let us know how it goes.
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Tuesday, October 22nd, 2013 AT 2:08 PM
Tiny
BLAKESWIFE18
  • MEMBER
Hey again just checked the codes and got p0300 and p0455?
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Tuesday, October 22nd, 2013 AT 3:40 PM
Tiny
JDL
  • EXPERT
How long since a tune-up? The po300 is a misfire code, could be fuel--spark--compression, almost anything, vacuum leak--egr, you name it. The two components used to determine that code are the ignition module and the cam sensor according to my database. You would need to check issues listed, before even getting to changing parts or your just throwing parts at it.

P0455 is evap systems leak, the system monitors the fuel tank pressure sensor reading to determine that code, of course there could just be a leak in the evap system. The evap system is for gas tank fumes, maybe your gas cap issue caused that code?
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Wednesday, October 23rd, 2013 AT 8:57 AM

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