Hey guys, been relying pretty heavily on this forum for the last couple of weeks and had some really fantastic tech info that’s helped rule out some issues

Truck details: 2000 ranger 2.5 manual

symptoms: engine stalls after heavy rev, cold or hot

Vehicle history: truck sat for 8 months, bought off a friend after my truck was stolen. Seemed to drive fine except for clutch being mirror shined

what happened before this started: replaced clutch

what I’ve tested or replaced: idle air control cleaned, replaced, then retested (good) EVR tested (good), replaced, TPS tested (good), cat back pressure tested via intake vacuum (good), MAF tested (good), new plugs and wires, connections and voltage supply tested for all previously mentioned sensors tested, all good. And I’m sure a number of things I’m not remembering right off the bat.

Current obd2 codes are 1409 EVR circuit malfunction and bank 2 O2 sensor fault

My question is, I guess, what could I be overlooking? I remember a wire harness that was hanging down over the transaxle when I was swapping the clutch, and these issues started after that. The odd thing is, the stalling has been getting progressively worse. I’m pulling my hair out, any ideas?

 

Welcome to the forum

P1409 EGR Vacuum Regulator Solenoid Circuit

This is a "circuit code" for the solenoid wires the computer uses to send vacuum to EGR valve to open it
EGR solenoid has 2 wires and 2 vacuum ports, round top, in a 2.5l its probably by the alternator on passenger side

Check connector for corrosion inside
Remove the unit and blow air thru each port, you shouldn't be able to, valve should be closed
If it passes air then replace it, its causing EGR valve to open when it should be closed and that causing the rough running

There will be a light blue/orange stripe wire and a Brown/pink wire for this solenoid
Light blue wire should have 12volts with key on, this is from Fuse 41 in engine bay fuse box, check it, it also powers O2 sensor HEATERS
The Brown wire goes to computer, it pulses the ground side to open the valve a little or alot to control vacuum going to EGR valve


I think you mean trouble code for O2 "sensor 2", as there is no "bank 2" on a 4cyl engine, thats for V6 or V8 engines
Sensor 2 is the rear O2 sensor, after the cat converters, downstream O2
What is the code on this one?
If its a heater code then Fuse 41

You may have pinched a wire when putting transmission back on so shorted out fuse 41

 

Hi jdmatthews123
Great post as usual Ron.
I found a couple of videos pertaining to the EGR Solenoid basically showing what Ron posted-
The first one by " MAGS How To Videos" shows how to test a 2 port EGR Solenoid similar to the one on the 2000 2.5L Ranger and other engines.

The second video shows the location and replacement of the EGR Solenoid by "radsky"-

I'll be testing my EGR solenoid today or tomorrow since my truck (2000/2.5L) has also developed a rough idle but has no codes to narrow it down. With tests this easy it's worth it to test the solenoid anyway just for peace of mind and to confirm it's either good or bad.
I hope you're able to find your issue and resolve it.