CEL + Flashing Cruise Cleared Itself? - Subaru Enthusiasts Car Club of the Sierras

Jeikun · 2012-09-06, 07:16 AM

I have a perplexing problem that I don't even know where to start on.

Yesterday, while cruising along in 5th gear, my car hiccuped and the CEL and cruise control light was flashing. I coasted to somewhere safe and, while I was coasting, the engine was revving itself to ~2500 RPM. I wasn't leaking anything and decided to try to start it again. It started without any issues and I was able to get to my destination without any other issues with the CEL/cruise lights on.

I also drove home with the lights on without any issues. 10 minutes after arriving home, I went and started my car again. The strange thing was that the CEL cleared itself. I drove to work without issues either.

Why would a CEL that would cause the Cruise control light to illuminate clear itself? Does this sound like a common issue like a misfire or bad gas?

Nick Koan · 2012-09-06, 08:33 AM

It could be a temporary issue. The code will still be available, even though the CEL has cleared itself. If you get an OBDII scanner you can read/clear it.

It could be a number of things, from bad gas to a failing O2 sensor, etc. Some codes could be harmless, some could actually mean something needs to get fixed in the near future.

The good(-ish) news, though, is that the car is clearing the CEL because this is not a consistent problem right now.

Jeikun · 2012-09-06, 12:34 PM

The friendly gentlemen at KSpeed were nice enough to take a look at it earlier today.

The code thrown is P0607 for Control Module Performance. This may be related to a malfunctioning ECU or related sensor. I mentioned that the car was seeming to hunt for idle when the CEL went on and I took it out of gear. Matt said that that was a possible symptom of a bad throttle position sensor.

Has anyone else ever gotten this code before?

renosubby · 2012-09-06, 02:46 PM

sounds like one of you main harnesses isn't connected all the way something along those lines, buddy of mine had that happen to him, would only let him rev to 2500, kind of like a limp mode

sperry · 2012-09-06, 07:07 PM

Hey Jake, glad to hear your problem didn't leave you stuck anywhere. I didn't get your message until late last night and totally spaced calling you back today.

Sorry 'bout that!

I don't know that you'd have a loose connection in the main harness, since your car is basically unmolested. Those harnesses don't just come loose on their own. But a specific sensor failing might be the culprit. I thought there was a specific code for TPS issues though, so getting a general error like you got seems odd if it's the TPS. If it's intermittent, really all you can do is wait for it to happen again and hope you can notice a pattern to how you were driving or something when it occured.

Jeikun · 2012-09-07, 06:39 AM

It all good. I apologize for the shitty message as my mind was going ~500 mph thinking about what it could be and what it would cost me.

You're right about the separate code for the TPS. I'm thinking more and more that it's a malfunctioning ECU but it hasn't happened since the other night so I'm hoping it was just a hiccup more than anything else.

2012-09-06, 07:16 AM	#1
Jeikun EJ22 Real Name: Jake Niedle Join Date: Mar 2008 Location: Damonte Ranch Posts: 427 Car: 2006 WRX Limited Class: little to none	CEL + Flashing Cruise Cleared Itself? I have a perplexing problem that I don't even know where to start on. Yesterday, while cruising along in 5th gear, my car hiccuped and the CEL and cruise control light was flashing. I coasted to somewhere safe and, while I was coasting, the engine was revving itself to ~2500 RPM. I wasn't leaking anything and decided to try to start it again. It started without any issues and I was able to get to my destination without any other issues with the CEL/cruise lights on. I also drove home with the lights on without any issues. 10 minutes after arriving home, I went and started my car again. The strange thing was that the CEL cleared itself. I drove to work without issues either. Why would a CEL that would cause the Cruise control light to illuminate clear itself? Does this sound like a common issue like a misfire or bad gas? __________________ Cook bacon in your underwear. It adds danger to breakfast and makes you feel like you are welding. - Juice

2012-09-06, 08:33 AM	#2
Nick Koan JDM Cowboy Real Name: Nick Join Date: Oct 2003 Location: Somewhere Posts: 8,642 Car: 2015 Mazda 3	It could be a temporary issue. The code will still be available, even though the CEL has cleared itself. If you get an OBDII scanner you can read/clear it. It could be a number of things, from bad gas to a failing O2 sensor, etc. Some codes could be harmless, some could actually mean something needs to get fixed in the near future. The good(-ish) news, though, is that the car is clearing the CEL because this is not a consistent problem right now. __________________ While a standard engine is powered by a belt connected to the crankshaft, a turbo engine runs on its own exhaust steam, making it more energy efficient. -- CNN

2012-09-06, 12:34 PM	#3
Jeikun EJ22 Real Name: Jake Niedle Join Date: Mar 2008 Location: Damonte Ranch Posts: 427 Car: 2006 WRX Limited Class: little to none	The friendly gentlemen at KSpeed were nice enough to take a look at it earlier today. The code thrown is P0607 for Control Module Performance. This may be related to a malfunctioning ECU or related sensor. I mentioned that the car was seeming to hunt for idle when the CEL went on and I took it out of gear. Matt said that that was a possible symptom of a bad throttle position sensor. Has anyone else ever gotten this code before? __________________ Cook bacon in your underwear. It adds danger to breakfast and makes you feel like you are welding. - Juice

2012-09-06, 02:46 PM	#4
renosubby RIP Real Name: Cory Schander Join Date: Oct 2007 Location: Reno, NV Posts: 163 Car: 2006 STI Class: SM Never dwell on the past, It fucks your future!	sounds like one of you main harnesses isn't connected all the way something along those lines, buddy of mine had that happen to him, would only let him rev to 2500, kind of like a limp mode __________________ *MAYHEM TUNING* 2006 CGM STI 570WHP 539WTQ 10.6 At 136MPH Sacramento

2012-09-06, 07:07 PM	#5
sperry The Doink Real Name: Scott Join Date: Nov 2002 Location: Portland, OR Posts: 20,335 Car: '09 OBXT, '02 WRX, '96 Miata Class: PDX/TT-6 The way out is through	Hey Jake, glad to hear your problem didn't leave you stuck anywhere. I didn't get your message until late last night and totally spaced calling you back today. Sorry 'bout that! I don't know that you'd have a loose connection in the main harness, since your car is basically unmolested. Those harnesses don't just come loose on their own. But a specific sensor failing might be the culprit. I thought there was a specific code for TPS issues though, so getting a general error like you got seems odd if it's the TPS. If it's intermittent, really all you can do is wait for it to happen again and hope you can notice a pattern to how you were driving or something when it occured. __________________ Is you is, or is you ain't, my con-stit-u-ints?

2012-09-07, 06:39 AM	#6
Jeikun EJ22 Real Name: Jake Niedle Join Date: Mar 2008 Location: Damonte Ranch Posts: 427 Car: 2006 WRX Limited Class: little to none	It all good. I apologize for the shitty message as my mind was going ~500 mph thinking about what it could be and what it would cost me. You're right about the separate code for the TPS. I'm thinking more and more that it's a malfunctioning ECU but it hasn't happened since the other night so I'm hoping it was just a hiccup more than anything else. __________________ Cook bacon in your underwear. It adds danger to breakfast and makes you feel like you are welding. - Juice

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