Check Engine Light
#1
Member
Posts like a V-Tak
Thread Starter
Join Date: Sep 2006
Location: Beverly, Ma.
Posts: 44
Likes: 0
Received 0 Likes
on
0 Posts
Check Engine Light
My check engine light comes on and it usually reads Throttle Position Sensor.
This solves the problem, because the check engine light always comes back on.
Last changing the Idle Control Valve solved the problem and as always the problem comes back.
I can always tell when the problem is starting to act up, the car runs crappy and idles very low to the point of stalling.
The check engine light will come on the next day and the car will start with a high idle on the cold mornings. I'll put the car in gear to keep the idle down. I then sit and let the engine warm up. I then turn the engine off and restart the car. This usually gets the idle back to normal.
This solves the problem, because the check engine light always comes back on.
Last changing the Idle Control Valve solved the problem and as always the problem comes back.
I can always tell when the problem is starting to act up, the car runs crappy and idles very low to the point of stalling.
The check engine light will come on the next day and the car will start with a high idle on the cold mornings. I'll put the car in gear to keep the idle down. I then sit and let the engine warm up. I then turn the engine off and restart the car. This usually gets the idle back to normal.
#2
DINOSAURUS BOOSTUS
Expert Gearhead
I wasn't able to fully understand what you wrote. Did you change the throttle position sensor?
I'd check the connections and wiring if so. It sounds intermittant.
I'd check the connections and wiring if so. It sounds intermittant.
#3
Member
Posts like a V-Tak
Thread Starter
Join Date: Sep 2006
Location: Beverly, Ma.
Posts: 44
Likes: 0
Received 0 Likes
on
0 Posts
I've changed the throttle position sensor a while ago, but not recently.
I have codes P1406 for the EGR and P0121 for the throttle postion sensor.
I have codes P1406 for the EGR and P0121 for the throttle postion sensor.
#6
DINOSAURUS BOOSTUS
Expert Gearhead
That'* cool that you both have the same "feeling". From what I've read and seen, I doubt that TPS code can be tripped by a vacuum leak.
https://www.gmforum.com/showthread.p...ighlight=p0121
https://www.gmforum.com/showthread.p...ighlight=p0121
#7
Retired Senior Admin
Expert Gearhead
Join Date: May 2006
Location: Sheboygan Wisconsin
Posts: 29,661
Likes: 0
Received 28 Likes
on
24 Posts
He said he changed the TPS, but it is possible it'* bad again. My thought is the low idle could trip odd codes, ie, idle does not match the TPS position. Vacuum leaks are also easy to check for and cost little to no money to do.
#9
Member
Posts like a V-Tak
Thread Starter
Join Date: Sep 2006
Location: Beverly, Ma.
Posts: 44
Likes: 0
Received 0 Likes
on
0 Posts
I also know that running the car with out the pcv valve will trip the Tps.
The car isn't acting up at the moment, I'll look at all of the those things, but I just have little ambition to look at the car outside in the winter.
The car isn't acting up at the moment, I'll look at all of the those things, but I just have little ambition to look at the car outside in the winter.