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Another P0300 Thread

Let me start with this: No, my search button is not broken Yes, I have read plenty of other P0300 Threads The Situation: Installed a Z1 34 Row Cooler (unplugged

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Old 05-24-2019, 06:36 PM   #1 (permalink)
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Default Another P0300 Thread

Let me start with this:

No, my search button is not broken
Yes, I have read plenty of other P0300 Threads

The Situation:
Installed a Z1 34 Row Cooler (unplugged battery during the process). As soon as I started driving the car, I am getting a flashing SES. Highlights:
  • Flashing P0300
  • Code comes in as "Pending" and won't specify a cylinder
  • Only happens while I am moving. Idling, revving in place, etc. I get nothing
  • I notice no performance impacts whatsoever
  • It is not the battery

Thoughts anyone?
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Old 12-11-2019, 02:25 AM   #2 (permalink)
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Quote:
Originally Posted by bcmr View Post
Let me start with this:

No, my search button is not broken
Yes, I have read plenty of other P0300 Threads

The Situation:
Installed a Z1 34 Row Cooler (unplugged battery during the process). As soon as I started driving the car, I am getting a flashing SES. Highlights:
  • Flashing P0300
  • Code comes in as "Pending" and won't specify a cylinder
  • Only happens while I am moving. Idling, revving in place, etc. I get nothing
  • I notice no performance impacts whatsoever
  • It is not the battery

Thoughts anyone?
This is something you're going to have to diagnose (obviously). Have you checked fuel pressure? What do your maf readings look like?
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Old 12-11-2019, 10:20 AM   #3 (permalink)
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You will have to drive around for a while for the ECM to relearn the engine. Engine will run rough while relearning which might cause a false knock detection.

Try resetting the ECM again. Pull battery cable and step on brake pedal for a few seconds. Reconnect battery. For a MY 2009, you will need to reset the windows (several threads about that on this site) and you will lose your radio presets.

Clean your MAFs. Very easy job and only takes 5-10 minutes. Dirty MAFs can cause weird problems.
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