Throttle problems
Thread Starter
Burning Brakes
Joined: Oct 2003
Posts: 1,106
Likes: 1
From: Foresters Falls(near Ottawa) Ont
Throttle problems
I've searched and found some useful info but I'm posting to see if I can get some ideas on this.
About three weeks ago I was accelerating after a turn, the engine went into "reduced power" mode. I pulled over, cleared the codes and kept going, no problems.
To-day, cruising, maybe accelerating lightly at 70mph, same thing, a sudden "reduced power". This time, I noted the codes before clearing them.
They were 1221, 1515 & 1278. I have read up on the codes, they are all related to the throttle, but can anyone tell me if any particular item is the cause of all three of the codes to come up?
I've searched the Forum and got some ideas, but I have to wonder if any one particular item can be the cause for the three codes.
Thanks in advance, RonJ, 2001 C5
About three weeks ago I was accelerating after a turn, the engine went into "reduced power" mode. I pulled over, cleared the codes and kept going, no problems.
To-day, cruising, maybe accelerating lightly at 70mph, same thing, a sudden "reduced power". This time, I noted the codes before clearing them.
They were 1221, 1515 & 1278. I have read up on the codes, they are all related to the throttle, but can anyone tell me if any particular item is the cause of all three of the codes to come up?
I've searched the Forum and got some ideas, but I have to wonder if any one particular item can be the cause for the three codes.
Thanks in advance, RonJ, 2001 C5
Instructor
Joined: Nov 2013
Posts: 229
Likes: 13
From: Columbia South Carolina
Replace your throttle position sensor.
I've also seen this occur with dirty PCM connections, Dirty Grounds, and/or moisture intrusion into the throttle body position sensor connector.
http://www.rockauto.com/catalog/rafr...ktemplate=true
I've also seen this occur with dirty PCM connections, Dirty Grounds, and/or moisture intrusion into the throttle body position sensor connector.
http://www.rockauto.com/catalog/rafr...ktemplate=true
Last edited by 175rgr; Sep 23, 2015 at 10:00 PM.
