Northstar Engines and System Technical Discussion Discussion, P030 Code on '93 STS in Cadillac Engine Discussion; Can anyone recommend a solution to the "ISC RPM Out Of Range" message or has anyone experienced it an found ...
- 12-08-03 06:35 PM #1Cadillac Owners Member
- Join Date
- Sep 2003
P030 Code on '93 STS
Can anyone recommend a solution to the "ISC RPM Out Of Range"
message or has anyone experienced it an found a solution.
- 12-09-03 10:41 PM #2
Re: P030 Code on '93 STS
Need more data to analyze.
The ISC (Idle Speed Control) error P030 controls the idle speed any time the throttle position switch is closed.
What other codes, if any, are set?
What is your idle speed?
If it does not display again it was just an intermittent and don't worry about it.
- 12-11-03 11:55 PM #3Cadillac Owners Member
- Join Date
- Oct 2003
- Richmond Va.
Re: P030 Code on '93 STSOriginally Posted by Dancho
heres some info on how it works..
The PCM controls idle RPM by increasing or decreasing the throttle opening using the Idle speed controler. The ISC motor will control engine RPM any time the tps is closed. Code P030 sets because the actual RPM never reaches desired RPM signifying a slow or failed ISC motor.
hope this helps...
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