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Misfire and Flashing Engine Light

 
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  #1 (permalink)  
Old 20 Oct 2016, 08:57 pm
Regular Cruiser
 
Join Date: Apr 2012
Location: Ontario, Canada
Posts: 123
Default Misfire and Flashing Engine Light

On the way home tonight, I had three instances where the engine chugged (misfired) a couple times and it quit when turning in the drive way - although it started right back up.

The engine light came on steady for about 15 seconds, then flashed for about the same period, then repeated steady and flashing. I checked the error codes and got a P0300 (engine misfire) and also a P0032 and P0038 (heater circuit high voltage bank 1 - sensors 1 and 2)

I'm already scheduled in the shop Friday morning for plugs and wires. New car to me and just wanted to do this as a maintenance thing. Has run fine up to this point and had no error codes yesterday.

If it makes any difference, it was rainy and damp all day today.

I guess my most important (urgent) question is - am I going to be ok to drive the car the eight miles to the mechanic in the morning, or could I potentially damage something ?

Mark.
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Old 20 Oct 2016, 09:16 pm
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Join Date: Aug 2014
Location: Thousand Oaks, CA
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Default Re: Misfire and Flashing Engine Light

This might be helpful to read if you have a turbo.

P0032 P0038
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Old 21 Oct 2016, 07:21 am
Fk5 Fk5 is offline
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Join Date: Jul 2011
Location: Colesville, MD
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Default Re: Misfire and Flashing Engine Light

General rule is steady CEL drive it to get fixed, flashing pull over and take care of it. With the misfire codes, I think that the usual issue is an overly rich mixture getting back to the cat. This can ruin them, so the CEL blinks to scare you from driving it. Somebody else probably knows better.
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Old 21 Oct 2016, 08:08 am
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Default Re: Misfire and Flashing Engine Light



The Owners manual states that the Malfunction Indicator Light flashes to alert to serious conditions that could lead to immediate loss of power or severe catalytic converter damage.
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Old 21 Oct 2016, 08:23 am
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Join Date: Apr 2012
Location: Ontario, Canada
Posts: 123
Default Re: Misfire and Flashing Engine Light

Sorry - I maybe should have mentioned it was a turbo version.

Thanks for the input guys. Got the car to the garage this morning ok. Engine light was still on (no flashing) and it did mis-fire a few more time enroute.

They are going to run a full diagnostic and see if anything obvious comes up. Also installing new plugs and wires - was having this done anyway before this new problem cropped up.

My mechanic apparently has the ability to flash a used PCM to work with my car if it comes down to that. Am currently just chomping at the bit waiting for that dreaded phone call from the mechanic ....

Mark.
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Old 21 Oct 2016, 08:34 am
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Join Date: May 2016
Location: Howell, MI
Posts: 405
Default Re: Misfire and Flashing Engine Light

It is not going to be the PCM, don't pay for it. It is almost never the PCM. Shops like to throw one at cars all the time and it never works to throw parts. Tell them to actually do diagnostics and fix the problem correctly. refuse to pay for any parts they recommend that don't fix the car.
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Old 21 Oct 2016, 08:41 am
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Join Date: Apr 2012
Location: Ontario, Canada
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Default Re: Misfire and Flashing Engine Light

Fortunately I have a trustworthy mechanic. When I mentioned the PCM, he shook his head and doubted it as well. He wanted to run a full diagnostic first and see what was what. He's not one to keep tossing on band-aids ....

Mark.
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Old 21 Oct 2016, 09:01 am
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Location: Thousand Oaks, CA
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Default Re: Misfire and Flashing Engine Light

P0032 -S1 - O2 Heater Circuit High

Possible Causes:
1. O2 heater element is damaged or the heater has failed
2. O2 heater control circuit is open or it is shorted to power
3, O2 heater ground circuit is open
4. PCM has failed

P0038 - S2 -Heater Circuit High

Possible Causes:
1. O2 Sensor failed or improper operation
2. O2 heater element is damaged or failed
3. O2 heater control circuit is open or it is shorted to power
4. O2 heater ground circuit is open
5. PCM has failed

P0300 - Multiple Cylinder Misfire

Possible Causes:
1. Fuel system problems exist
2. Erratic Camshaft or Crankshaft Sensor signals
3. Ignition system problems exist
4. Engine mechanical problems exist
5. PCM has failed

I would suggest checking the ground wire going to both O2 sensors.
I would suggest checking the fuel pressure for the P0300 code.

Did all three codes trigger at the same time?
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Last edited by ptcruisersteve; 21 Oct 2016 at 09:05 am.
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Old 21 Oct 2016, 10:18 am
Regular Cruiser
 
Join Date: Apr 2012
Location: Ontario, Canada
Posts: 123
Default Re: Misfire and Flashing Engine Light

On the way into town last night and it happened, it just gave me the P0032 and P0038 codes. On the way home, it did it a couple more times and the read back then also included the P0300 code.

Mark.
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Old 21 Oct 2016, 05:14 pm
Young Cruiser
 
Join Date: Sep 2016
Location: Southern Oregon
Posts: 83
Default Re: Misfire and Flashing Engine Light

Quote:
Originally Posted by ptcruisersteve View Post
P0032 -S1 - O2 Heater Circuit High

Possible Causes:
1. O2 heater element is damaged or the heater has failed
2. O2 heater control circuit is open or it is shorted to power
3, O2 heater ground circuit is open
4. PCM has failed

P0038 - S2 -Heater Circuit High

Possible Causes:
1. O2 Sensor failed or improper operation
2. O2 heater element is damaged or failed
3. O2 heater control circuit is open or it is shorted to power
4. O2 heater ground circuit is open
5. PCM has failed

P0300 - Multiple Cylinder Misfire

Possible Causes:
1. Fuel system problems exist
2. Erratic Camshaft or Crankshaft Sensor signals
3. Ignition system problems exist
4. Engine mechanical problems exist
5. PCM has failed

I would suggest checking the ground wire going to both O2 sensors.
I would suggest checking the fuel pressure for the P0300 code.

Did all three codes trigger at the same time?
You know, this is something that I just don't understand. All these possible causes. Car makers can put a car together with all these wonderful electronics that work in conjunction with each other. I mean, all these components are working within split, micro-seconds from signals from precisely named individual components. And then all of a sudden, BAM!, something gets a hiccup and the software program tells you to check 5 different things. What the heck is that about? That software program should tell you EXACTLY where the issue is. NOT check the crank or cam sensor. It should tell you which one is at fault. It should tell you if it's fuel or ignition, not check this or that. That's NUTS!

And that is what I have against electronic diagnostic tools. It is the program that is at fault.

My rant for the day.

Have a nice day.

BTW, this is not directed at you, Steve. Just the whole concept of using the tools and then having to figure out where to go from there.
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