I Hate My Check Engine Light!!!

[95sflasho]

I've replaced my o2 sensors, dpfe sensor and checked my egr, cleared my coded reset the idle and I still get that #$%$# light!! I'm still getting a 335 code. What could it be??? I'm making it my mission in life to get rid of that check engine light. C'mon guys help me out here.

 

[98TRSHO]

take out the bulb....
when I bought my 94 my husband bragged for almost 6 months about how its the only 2nd gen we've owned without the check engine light on... When I got new gadges we took apart the dash and found the owners before us took out the bulb! when we replaced it the light came right on!

 

[95sflasho]

too funny!!!! however, i'd kind of like to fix it. i will keep your suggestion in mind though. )

 

[40BelowSummer]

Diagnostic Trouble Code (DTC) 335 indicates the Pressure Feedback EGR (PFE) / Differential Pressure Feedback EGR (DPFE) sensor is out of Self-Test range.

Possible causes are:
• Damaged PFE/DPFE sensor.
• Obstructed pressure inlet hose(s).
• Garage exhaust ventilation system affecting PFE/DPFE sensor operation.
PFE/DPFE system can sense a lack of pressure in the vehicle exhaust system. An efficient garage exhaust ventilation system that is installed during KOEO test mode may generate a DTC 335.
• Remove garage forced ventilation system and properly vent to atmosphere.
• Rerun KOEO test.

 

[THEREALSHO16]

also make sure ur speed sensor and the sensors on the fire wall are all pluged in
my light wuz on for a while and i went diggin through the engine and found the speed sensor wuznt connected and when i pluged it in the light went off

 

[95sflasho]

Where is the speed sensor? Where is the garage forced ventilation system? Thanks for the suggestions

 

[SHOZ123]

Are the small hoses attached correctly on the DPFE? Is the EGR vacuum solenoid working OK?

 

[projectSHO89]

Where is the garage forced ventilation system?

This refers to the exhaust removal systems in commercial vehicle service bays. Basically a big hose(s) that fits over the exhaust pipe(s) and sucks the exhaust out of the building. If it has enough vaccum on it, it can affect exhaust system pressures and cause false EGR codes when the vehicle is tested in the shop bay. You can safely ignore this concern if you aren't in a shop bay with the exhaust removal system.

See this thread. It has a lot of relevent information. http://www.shoforum.com/showthread.php?t=56088&highlight=335

No sense in re-inventing a wheel...

Steve

 

[Bizzy]

Here's a good thread for you to read:
http://www.shoforum.com/showthread.php?t=56088

 

[95sflasho]

After checking the egr, replacing the dpfe (I did the 02's a few months ago) I believe the problem is my vss (great). I bought the part today and intended to put it in...WRONG!! I'm giving the car to my mechanic for that job!!!!! My speedo jumped around a bit today and the vps has been a little off for a while so I'm hoping replacing the vss will take care of my problem since there's nothing left to replace in the emmission system. My mechanic has done tons of work for me in the past and won't charge me more that $100 or so and it seems to be well worth it.

 

[rangerj]

NOTE:
If you have a "check engine" light on there is a problem with one of several possible sensors. Removing the light bulb WILL NOT solve the problem. When the check engine light is triggered, by either a failure of a sensor, or a lack of signal from a sensor, the computer puts the electronic ignition system in a "limp-in" mode. The engine is made to run rich and timing is affected. So, fix the problem and not the symptom, such as removing the light bulb.

 

[95sflasho]

Thank you for the heads up. I'm hoping replacing the vss will take care of the light.