High idle RPMs and check engine light with no codes

Tiny
DONTBLINK182182
  • MEMBER
  • 2005 CHRYSLER SEBRING
  • 2.4L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 145,000 MILES
When I start the car the it isles at 1,200 to 1,500 rpm's even at operating temperatures it will still idle that high. When I put it in gear it goes down, but shoots back up. When in park the check in light is on, but it pushed out no codes and will occasionally go off but come back on.
Do you
have the same problem?
Yes
No
Saturday, May 11th, 2019 AT 1:46 PM

9 Replies

Tiny
DANNY L
  • EXPERT
Hello, I'm Danny.

Even when the check engine light comes on and goes off that still means a fault code is stored.First thing to do is have the code(s) read. If you don't have access to a code reader/scanner most of your local auto parts will check for free. Here is a tutorial showing you what is involved:

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

After having this done get back to us with the codes.Having these codes will help us to properly diagnose your car.Hope this helps and thanks for using 2CarPros.
Danny-
Was this
answer
helpful?
Yes
No
+1
Saturday, May 11th, 2019 AT 6:25 PM
Tiny
DONTBLINK182182
  • MEMBER
I went and got it checked at AutoZone and the code that came back was P0507. The guy said that it was saying to replace the PCV valve so I did and it didn’t change anything it is still idling high and the engine light is still on.
Was this
answer
helpful?
Yes
No
Sunday, May 19th, 2019 AT 10:27 AM
Tiny
STEVE W.
  • EXPERT
P0507 - Idle Control System RPM Higher Than Expected. So the computer is expecting an idle speed of 600 rpm's based on all of the settings and readings it has, but instead the idle is 1000 rpm's. A common cause for this is a vacuum leak.
A quick question, is this Sebring a two door coupe or a four door sedan/convertible? Asking because although they share a name the two door is a Mitsubishi based car while the others use Chrysler platforms, The engines are also different.
Was this
answer
helpful?
Yes
No
+1
Thursday, May 23rd, 2019 AT 7:24 AM
Tiny
DONTBLINK182182
  • MEMBER
It is a 4 door 2.4L sedan.
Was this
answer
helpful?
Yes
No
Thursday, May 23rd, 2019 AT 11:13 AM
Tiny
STEVE W.
  • EXPERT
Okay, that the Chrysler engine and platform. Easy testing process. Get a can of carburetor cleaner. Start the cold engine and spray a small spot on the hoses and intake at a time and just listen to the engine. If there is a leak the engine will rev up from the extra fuel. A good visual inspection as well may find it faster.
Was this
answer
helpful?
Yes
No
+1
Thursday, May 23rd, 2019 AT 12:22 PM
Tiny
DONTBLINK182182
  • MEMBER
I’m thinking that it may be the throttle positioning sensor because the code said the idle was higher than expected. My boss also thinks the same thing and he dabbled in cars for awhile.
Was this
answer
helpful?
Yes
No
Friday, May 24th, 2019 AT 7:20 AM
Tiny
STEVE W.
  • EXPERT
TPS issues wouldn't give you that particular code or the high idle. A vacuum leak, failed PCV (acts like a vacuum leak) or an issue with the idle air control system are the main items that would cause a P0507. You changed the PCV already with no result. The next step would be to verify that no air is getting into the engine through leaks. Then testing the IAC and cleaning that out would be next.
Was this
answer
helpful?
Yes
No
+1
Friday, May 24th, 2019 AT 9:44 AM
Tiny
DONTBLINK182182
  • MEMBER
So where would I start to look for a vacuum leak?
Was this
answer
helpful?
Yes
No
Friday, May 24th, 2019 AT 11:27 AM
Tiny
STEVE W.
  • EXPERT
Could be anywhere, that's why I suggest the spray to start with, to help narrow it down. Being 13 years old I would check any vacuum lines and the intake manifold. A quick test on some would be to simply squeeze them. If blocking a hose suddenly changes the idle start hunting along it and its components.
Was this
answer
helpful?
Yes
No
+1
Friday, May 24th, 2019 AT 12:33 PM

Please login or register to post a reply.

Sponsored links