04 Saturn L300 no throttle response only goes 10mph and it jerks as it would lose power

Tiny
JR05
  • MEMBER
  • 2004 SATURN L300
  • 21,000 MILES
Hi, I have a 04 Saturn L300 with some problems that im trying to figure out and fix. Well the car started acting like this out of nowhere. In park it revs good, but when I put in drive and step on the accelerator it has almost no response and it would like jerk. Thanks in advance.
Thursday, July 19th, 2012 AT 3:11 AM

25 Replies

Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
So is the reduce power light on?Also do you have the 2.2L or 3.0L engine?If the reduced performance light is not on then I suspect possible a plugged cat. Have you had the computer scanned for codes?
Was this
answer
helpful?
Yes
No
+2
Thursday, July 19th, 2012 AT 3:39 AM
Tiny
JR05
  • MEMBER
  • 14 POSTS
I dont know about the reduced power light, which is that one? 3.0L. These are the codes I got p0341, p2110, p2138.
Was this
answer
helpful?
Yes
No
Thursday, July 19th, 2012 AT 3:46 AM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
P2110 and P2138 are tied together you would diagnose the P2138 which is accelerator pedal position sensor 1-2 correlation. The P0341 is camshaft position sensor performance. The code P2138 is most likely a bad accelerator pedal position sensor. But you would have to go thru the trouble tree for that code. You would have to use a multimeter to check the circuits from the accelerator pedal sensor to the ecm. That way you would narrow it down to a wire issue or a sensor issue. You would do the same thing with the code P0341. The reason it only goes 10 mph is because the computer put the car in limp mode because there is a failure in the throttle by wire system.
Was this
answer
helpful?
Yes
No
+1
Thursday, July 19th, 2012 AT 4:26 AM
Tiny
JR05
  • MEMBER
  • 14 POSTS
Ok, I do have a multimeter. What would the values or specs be? Where would I check it, at the pedal or the ecm? So you dont think its a clogged cat?
Was this
answer
helpful?
Yes
No
Thursday, July 19th, 2012 AT 5:14 AM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
If you had a clogged cat it wouldnt set any of those codes. Also you need to check the wires from the pedal to the ecm the wires from end to end with the multimeter. Also the cam sensor code as well I will get you the info on that.
Was this
answer
helpful?
Yes
No
Thursday, July 19th, 2012 AT 5:21 AM
Tiny
JR05
  • MEMBER
  • 14 POSTS
Ok sounds good thanks. One question, if the pedal position sensor would be bad, would I have good throttle response in park abd neutral?
Was this
answer
helpful?
Yes
No
Thursday, July 19th, 2012 AT 5:52 AM
Tiny
JR05
  • MEMBER
  • 14 POSTS
Because throttle response in park and neutral seems to be good.
Was this
answer
helpful?
Yes
No
Thursday, July 19th, 2012 AT 5:55 AM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
You have a code for the pedal sensor and when in gear its in limp so sounds like a issue with the pedal sensor or wiring issue.
Was this
answer
helpful?
Yes
No
Thursday, July 19th, 2012 AT 5:58 AM
Tiny
JR05
  • MEMBER
  • 14 POSTS
Ok I see, I can check the circuits out with my multimeter, but what would be the correct specs or what numbers should I look for on the pedal sensor and the cam sensor?
Was this
answer
helpful?
Yes
No
Thursday, July 19th, 2012 AT 5:46 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
Lets do this first clear the codes and lets see if ethier the pedal sensor or cam sensor code comes right back?If they dont its going to be hard to check the wires. The tests iam talking about are checking the wire ends from point A to point B and see what the resistance is from the ecm to the sensor.
Was this
answer
helpful?
Yes
No
Thursday, July 19th, 2012 AT 6:01 PM
Tiny
JR05
  • MEMBER
  • 14 POSTS
Ok, ill do this when I get home, im at work at the moment. But what numbers would be acceptable resistance?
Was this
answer
helpful?
Yes
No
Thursday, July 19th, 2012 AT 6:31 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
I think the trouble tree says 5 ohms but I like to see 2 ohms or less.
Was this
answer
helpful?
Yes
No
Thursday, July 19th, 2012 AT 6:34 PM
Tiny
JR05
  • MEMBER
  • 14 POSTS
That would be for the pedal sensor correct? What about cam sensor?
Was this
answer
helpful?
Yes
No
Thursday, July 19th, 2012 AT 7:30 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
Your not understanding what iam saying here the wires go from the pedal sensor to the ecm. You would measure each wire end from where it hooks to the pedal sensor then the opposite of the wire where it goes on the ecm. You would have the ecm and the pedal sensor unplugged. Then measure the resistance from each end of the wire from point A to point B. Now do you understand?Same thing with the cam sensor.
Was this
answer
helpful?
Yes
No
+1
Thursday, July 19th, 2012 AT 8:15 PM
Tiny
JR05
  • MEMBER
  • 14 POSTS
Oh ok. I didnt read one of the replies carefully. Right, so thats to check just the wiring. But is there any way to check the actual pedal sensor or cam sensor?
Was this
answer
helpful?
Yes
No
Thursday, July 19th, 2012 AT 9:34 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
What you do is elimanate the wiring as the cause and go from there. Lets see how the codes go and I will get you the trouble trees if needed.
Was this
answer
helpful?
Yes
No
Thursday, July 19th, 2012 AT 10:00 PM
Tiny
JR05
  • MEMBER
  • 14 POSTS
Ok sounds good. I'll work on it in a couple mins and ill let you know what I come up with.
Was this
answer
helpful?
Yes
No
Thursday, July 19th, 2012 AT 10:12 PM
Tiny
JR05
  • MEMBER
  • 14 POSTS
Ok this what I got. I cleared the dtc's, took the car for a drive around the block and I got these codes: p2138, p0343, p0102. I had never gotten that 0102 before. So I cleared the codes again and took around the block again. This time I got 2 codes both being p2138. I cleared the dtc's again and took it for one last drive and again got p2138. I wasnt able to get some resistance reading in the wiring since I wasnt sure what pins on the ecm harness where the ones coming from the pedal since they where a little dirty under hood and couldnt tell the wire color.
Was this
answer
helpful?
Yes
No
Friday, July 20th, 2012 AT 2:29 AM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
There you go theres a trouble tree and a wire diagram let me know what you find.
Was this
answer
helpful?
Yes
No
+1
Friday, July 20th, 2012 AT 2:49 AM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
So does the P2138 come right back after clearing it?
Was this
answer
helpful?
Yes
No
Friday, July 20th, 2012 AT 3:03 AM

Please login or register to post a reply.

Sponsored links