fault code - Engine ODB2 Fault Codes


	Auto Repair Home	SEARCH POSTS	WHO'S ONLINE	LOG IN

Automotive Repair

Car Troubleshooting Topics
  Car Troubleshooting
  Engine Troubleshooting
  Engine Fault Codes
  Electrical and Wiring
  Transmission Problems

Car Repair Topics
  Car Making Noises
  Car Stereo Repair
  Heating or AC Issues
  Motorcycles and ATVs
  Tricks of the Trade
  Truck Repair Advice

Site Options:
  Login
  Sign up here!

Latest Forum Post

2011 Dodge Nitro OBD scanner seems to drain battery in 10-20 minutes

When I bought this car in summer 2023, a...

Grounding Cable, 2017 Jeep Renegade Trailhawk

The Cable that connects my negative batt...

Rough Idle (Found new thing)

Hi everyone. First of all sorry for bad ...

equipment

hey yall. im a first year engineering st...

HELP

I have a 1956 1/2 ton panel truck, 69 35...

Howdy

    Just wanted to s...

ABS/Tractiob/Brake Lights on But No DTCs

Hello all, Recently while driving m...

Chevy strut replacement

I'm trying to get a sensor of some kind ...

2020 suburban new transmission and issues after install

recently had the transmission fail at 11...

Caliper piston post cleaning won't screw in

Hello, 2013 Hyundai Elantra limited (ma...

fault code

Sign up here!

Email This Post

Auto Repair Home>> Automotive Repair>> Engine ODB2 Fault Codes

southensoldier
User

Jan 15, 2009, 5:31 PM

Post #1 of 3 (2317 views)

fault code	Sign In

my 92 honda accord gives me a fault code of 12 and the check engine light comes on. The book says to check the EGR and hoses, but wha am I looking for???? Also after about 5 minutes of idling it starts to sparatically idle. Any ideas on what the cause here....

Todd Norton
User

Feb 28, 2009, 1:42 PM

Post #2 of 3 (2245 views)

Re: fault code	Sign In

would like to help but need more info like what engine, any recent repairs ,mileage , carb or injected..ect let us know ..k ..........Todd

Loren Champlain Sr
Veteran / Moderator
Loren Champlain Sr profile image

Feb 28, 2009, 5:49 PM

Post #3 of 3 (2241 views)

Re: fault code	Sign In

soldier; Pardon my jumping in here. Code 12 is EGR system. From the symptoms you describe, it could be that the EGR is stuck partially open. Sometimes a piece of carbon will get stuck between the pintle and seat. This will usually happen, or at least be noticed, on deceleration from above 40mph. You can remove the EGR valve and visually inspect the pintle area. You'll see two passages. One with the pintle, and the other an open port. You shouldn't be able to blow through the two. Or, you can pour water in one and see if it leaks through. Sometimes, you can use carb cleaner and clean the pintle/seat. The vacuum line going to the EGR valve should NOT have vacuum to it at idle. If it does, then there is a problem with the EGR sensor/switch. If you have a vacuum pump, you can apply 14hg to the valve. The engine should at least stumble, if not die. If no change, the valve either isn't opening at all, or it's already stuck in the open position. The fuel injection will see this as extra air and command more fuel to try and compensate. But, don't run out and buy and EGR valve, yet. Let's make sure it's the valve, first.
Loren
SW Washington

Email This Post

Search for (options) Privacy Sitemap