P0301 and p0300. Lost. ECM? - Camry Forums - Toyota Camry Forum


ECU & Electronics Discuss electronics and related components within.

Reply
 
 
 
Thread Tools Search this Thread
  #1  
Old 11-03-2017, 04:22 PM
Junior Member
Thread Starter
 
Join Date: Nov 2017
Posts: 2
Default P0301 and p0300. Lost. ECM?

1998 Toyota Camry. 3.0 v6. 263,000 miles, but engine rebuilt 80,000 ago by certified Toyota dealer. Engine code p0301 (cylinder one misfire) and p0300 (multiple cylinder misfire). Have changed plugs, boots, coils, wires, egr valve. Cleaned Intake air sensor. Cleaned map sensor. Problem is intermittent. Usually occurs after car is warmed up. Especially if car is turned off after warm and started again. Noticeable at idle. Noticeable when applying load. When applying heavy load, the car will have a flashing check engine lights. Anywhere from 3-20 blinks. It will not always keep the light on afterward. Once the light is on steady, it stays until cleared. Again, intermittent problem steers me away from catalytic converter or bad valve or bad head.

Haven't done compression test because I don't feel a valve or head would be intermittent.

Seems like its happening when trying to go into closed loop?

I have also changed the ignitor as well now, to no avail.

Could it be a pcm? I'm so lost and have sunk Every penny into this. Help!!!!!!
Reply With Quote
  #2  
Old 11-03-2017, 06:15 PM
Super Moderator
 
Join Date: Jan 2008
Location: PTW
Posts: 10,171
Default

The blinking light indicates the engine misfire is bad enough to risk damaging the converter from over heating.

Swap coils and determine if the code moves with the coil.

There is a service bulletin on these codes but may not apply.

https://www.carmd.com/Tsb/Download/26599/T-EG008-04

If really No 1 cylinder check fuel injector.

Are the spark plug wires installed correctly?

Read related topics on this subject below.
Reply With Quote
  #3  
Old 11-04-2017, 12:49 AM
Junior Member
Thread Starter
 
Join Date: Nov 2017
Posts: 2
Default

I have swapped everything, and it has New fuel injectors as well. I'll review the tsb you posted as well, thanks. The intermittent nature of it leads me to think electrical... can a cat issue be intermittent?
Reply With Quote
  #4  
Old 11-04-2017, 08:26 PM
Super Moderator
 
Join Date: Jan 2008
Location: PTW
Posts: 10,171
Default

Check small wires to the coils.

How about engine coolant temp sensor?
Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Out of Ideas!! P0300 P0301 P0303 codes jmaz001 General Tech 10 11-18-2013 08:35 PM
99 Toyota Solara V6 trouble codes: P0300, P0301-P0306, P0141, P0446 colsoncj ECU & Electronics 5 10-04-2012 12:35 AM
99 Avalon(1mz-fe) P1300,P0300,P0302,P0305 pmesfun General Tech 4 04-12-2011 12:06 AM
P0301 and P0304 philarge New Member Area 6 01-12-2011 11:25 PM
Code P0300 head scratcher! gull camry General Tech 2 10-01-2007 02:40 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -5. The time now is 06:19 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.