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What fuse controls the plug for the emissions test

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There are fuses that control some emission sensors(IE. fuel). But the engine computer is really what controls emissions.( all the other stuff)

Nov 08, 2014 | 1998 Saturn SL

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No power on dash,radio,parking lights and plug for emission test

Check the fuses against a dark piece of paper. I have had some look OK but looking closer against a dark background showed a crack. I had a Toyota that thought it didn't have any gas and would run intermittently. Checked all sorts of things and it was a 15 cent fuse.

Mar 15, 2014 | 1997 Nissan Pickup

1 Answer

Mazda miata computer not comminicating to obdII

You likely just have a blown fuse at the diagnostic connector, check to see that you have 12 volts at pin 16 on the connector. See diagram of pin below.

Oct 02, 2012 | 2000 Mazda MX-5 Miata

1 Answer

What is code P0449 for 1999 oldsmobile silhouette?

code 0449 evaporative emission control system vent valve solenoid circuit malfunction check your fuses as well as connections and power going to the solenoid see manual for location of valve

Jun 28, 2012 | 1999 Oldsmobile Silhouette

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What is evaporative emission vent valve solenoid malfunction and how do you repair it?

Refer to a Professtional Certified Garage for Emision Test your Catalizer plug emission control as to be change and clean ..
Check PC,s valve also for bad Vacumm control emission for Economic control system ...

Sep 30, 2010 | 2004 Hyundai Elantra

2 Answers


It is most likely the ecm,this is the problem on the emissions test failure most likely.

Jun 03, 2010 | 2003 Ford Windstar

1 Answer

Emission test

Why aren't they just using the OBD II port instead of the dynomometer? Which state are you in? In Washington, where I work as an emission test specialist, we don't even use the dyne (rollers) to do the test. The OBD II port doesn't require the car to be taken out of park.
If you have to resort to it, just pull the TCS fuse for the test. The TCS won't activate and you won't get any emissions error codes.
Be sure to check with the testing facility before you do this. They may not allow it if it may be considered a safety issue.
I wish you the best!

Feb 27, 2010 | 2001 Hyundai XG300

1 Answer

Can't access on-board codes at all, '98 S10.

I would recommend checking the fuse that controls the cigarette lighter.... i know it sounds strange, but most manufacturers link the power to the OBD test port to the same fuse as the cigarette lighter, mainly because it would be the least used accessory in the vehicle. Hope this helps.

Jul 18, 2009 | 1997 Hyundai Accent

2 Answers

Instrument panel cluster gauges and odometer has stopped working

I had all my analog instrument panel gauges stop working after they did the state emissions test. I found the proper fuse in the fuse block located under the hood. Simply unplugged the fuse, noticed it was still good, and plugged the same fuse (10A) back in and all the gauges started working again. Guess it needed a reset atfer they plugged in for the emissions.

Mar 19, 2009 | 2003 Chevrolet Silverado 2500HD

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97 honda civic emission test

hi,  this got fixed . . . all my fuses i checked WERE good . .  BUT, i had taken out my dome light fuse to replace another similar fuse that had blown . . . the mechanic at Honda let me know that the diagnostic system runs through the domelight fuse for some reason - once that fuse was replaced, it was good to go!

Aug 02, 2008 | 1997 Honda Civic

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