DP Fix? Spacers?

Welterweight · 10-01-2015, 01:55 PM

Ok so I have three not ready monitors. Evap, Heat, No Cats. Wondering if a DP fix will take care of these? Mechanic said I should install a spacer at O2 sensors to lessen heat. Is that what a DP fix does? Been chasing this for a month now. Thanks guys.

RX-BMW · 10-01-2015, 02:13 PM

When did you last flash the car? If you're running catless COBB tune Stage 2 and higher, you shouldn't need DP fix. DP fix simply gets rid of your CEL (check engine light)

MDORPHN · 10-01-2015, 03:13 PM

Quote:

Originally Posted by RX-BMW

When did you last flash the car? If you're running catless COBB tune Stage 2 and higher, you shouldn't need DP fix. DP fix simply gets rid of your CEL (check engine light)

Wrong.

The dp fix will allow the car to show readiness.

Neil

msjt · 10-01-2015, 03:37 PM

If your state allows one monitor not ready, you can just user a flash that suppresses the cat codes and you'll be good. Just do a proper drive cycle.

Welterweight · 10-01-2015, 04:48 PM

Ok. I have 3 not ready after 200 miles of driving!

tc535i · 10-01-2015, 04:52 PM

yes

dp fix just takes the voltage from the first sensor and reduces it ~15% to make it seem like the cat is there and doing something

spacing a sensor also changes voltage and is an old trick to produce a similar result

I prefer the dp fix because it was an easier/cleaner install for me and I knew it worked.

Welterweight · 10-01-2015, 05:13 PM

Thank you so much! Will it have any effect of EVap and Heat?

Miller335 · 10-01-2015, 05:32 PM

Quote:

Originally Posted by msjt

If your state allows one monitor not ready, you can just user a flash that suppresses the cat codes and you'll be good. Just do a proper drive cycle.

Did this recently, passed no problem. Just had to make sure the cat readiness was good like you said.

Jnat · 10-01-2015, 05:58 PM

Just out of curiousity, has anyone tried or know if the old spacer on the rear O2 sensor trick works on our cars ( i still have cats but just wondering )???

RX-BMW · 10-02-2015, 11:45 AM

Quote:

Originally Posted by MDORPHN

Wrong.

The dp fix will allow the car to show readiness.

Neil

Oops you're right, sorry. Flash get's rid of CEL and dp fix does the rest.

tc535i · 10-04-2015, 01:48 PM

Quote:

Originally Posted by RX-BMW

Oops you're right, sorry. Flash get's rid of CEL and dp fix does the rest.

Flashing out cel means rear o2 are disabled which keeps obd2 from achieving c@t readiness even with a dp fix installed. This will not pass ca smog fwiw

terryd5150 · 10-04-2015, 09:11 PM

I've used spark plug defoulers as spacers for the 02 sensors to clear catalytic converter errors on another platform (car was not tuned).

Worked flawlessly; however, that was still in the presence of the (worn-out) catalytic converter.

I'm not sure how well it would work in the complete absense of a catalytic converter, I.E. catless downpipes.

Could be worth a shot to clear the CEL; although, as with a DP fix, you'll still be sending a false signal to the DME so tuning will never be spot on - depending on how aggressive your tune is this could be a very dangerous condition.

For this reason, I'd only run a DP fix (or spacers) on map 0 - or whatever the "bypass” map is.

Plus, it would be far harder to physically remove the spacers than to deactivate a DP fix; so I'd still recommend skipping the spacers and using the DP fix at test time.

Once the test is over, disable the DP fix and just let the JB4/Cobb continue to clear the CEL.

Welterweight · 10-04-2015, 09:29 PM

Thank you sir! DP fix is ordered!

10-01-2015, 01:55 PM	#1
Welterweight Major 98 Rep 1,321 Posts Drives: Truck in snow, coupe in summer Join Date: Jan 2013 Location: Boston iTrader: (3) Garage List 2012 BMW 328i [0.00] 2005 Dodge Ram Quad ... [0.00] 2009 BMW 335xi E92 [10.00]	DP Fix? Spacers? Ok so I have three not ready monitors. Evap, Heat, No Cats. Wondering if a DP fix will take care of these? Mechanic said I should install a spacer at O2 sensors to lessen heat. Is that what a DP fix does? Been chasing this for a month now. Thanks guys. __________________ 2009 BSM E92 335xi - RR600's/FBO-VRSF/Apex Arc 8/Wedge E60 MHD/Fuel it Stage 2/BMW PE w/ Dimisa Tips/Alpina TCU/Dinan Springs/RB Inlets/3.5 Bar TMAP
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10-01-2015, 02:13 PM	#2
RX-BMW Second Lieutenant 18 Rep 268 Posts Drives: 2009 135i sport package 6AT Join Date: Aug 2010 Location: St. Louis iTrader: (0)	When did you last flash the car? If you're running catless COBB tune Stage 2 and higher, you shouldn't need DP fix. DP fix simply gets rid of your CEL (check engine light) __________________ Custom Wedge MHD 2+ Aggressive, AR Catless DP, ETS 5 FMIC, BMS DCI, BMS OCC, Berk Axleback, CF Diffuser, CP-E Chargepipe
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10-01-2015, 03:37 PM	#4
msjt First Lieutenant 160 Rep 305 Posts Drives: e92 335i Join Date: Jan 2013 Location: queens, nyc iTrader: (0)	If your state allows one monitor not ready, you can just user a flash that suppresses the cat codes and you'll be good. Just do a proper drive cycle.
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10-01-2015, 04:48 PM	#5
Welterweight Major 98 Rep 1,321 Posts Drives: Truck in snow, coupe in summer Join Date: Jan 2013 Location: Boston iTrader: (3) Garage List 2012 BMW 328i [0.00] 2005 Dodge Ram Quad ... [0.00] 2009 BMW 335xi E92 [10.00]	Ok. I have 3 not ready after 200 miles of driving!
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10-01-2015, 04:52 PM	#6
tc535i Lieutenant Colonel 215 Rep 1,818 Posts Drives: 2007 335i, 2001 330i, 1995 M3 Join Date: Sep 2013 Location: West Los Angeles iTrader: (1)	yes dp fix just takes the voltage from the first sensor and reduces it ~15% to make it seem like the cat is there and doing something spacing a sensor also changes voltage and is an old trick to produce a similar result I prefer the dp fix because it was an easier/cleaner install for me and I knew it worked.
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10-01-2015, 05:13 PM	#7
Welterweight Major 98 Rep 1,321 Posts Drives: Truck in snow, coupe in summer Join Date: Jan 2013 Location: Boston iTrader: (3) Garage List 2012 BMW 328i [0.00] 2005 Dodge Ram Quad ... [0.00] 2009 BMW 335xi E92 [10.00]	Thank you so much! Will it have any effect of EVap and Heat?
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10-01-2015, 05:58 PM	#9
Jnat DisplacementReplacement 409 Rep 1,102 Posts Drives: 2020 X3M Join Date: Sep 2012 Location: Jersey Shore iTrader: (0)	Just out of curiousity, has anyone tried or know if the old spacer on the rear O2 sensor trick works on our cars ( i still have cats but just wondering )??? __________________ 2020 X3M /// MHD Tune Prior Bimmers 2017 240XI Hybrid / FBO / MHD E40 2015 235XI FBO / MHD E30 2009 335XI FBO / COBB / E30
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10-04-2015, 09:11 PM	#12
terryd5150 Head Fry Cook at McBurgertown 507 Rep 1,005 Posts Drives: 2015 435i M-Sport 6MT Join Date: May 2015 Location: Greenville, SC iTrader: (9)	I've used spark plug defoulers as spacers for the 02 sensors to clear catalytic converter errors on another platform (car was not tuned). Worked flawlessly; however, that was still in the presence of the (worn-out) catalytic converter. I'm not sure how well it would work in the complete absense of a catalytic converter, I.E. catless downpipes. Could be worth a shot to clear the CEL; although, as with a DP fix, you'll still be sending a false signal to the DME so tuning will never be spot on - depending on how aggressive your tune is this could be a very dangerous condition. For this reason, I'd only run a DP fix (or spacers) on map 0 - or whatever the "bypass” map is. Plus, it would be far harder to physically remove the spacers than to deactivate a DP fix; so I'd still recommend skipping the spacers and using the DP fix at test time. Once the test is over, disable the DP fix and just let the JB4/Cobb continue to clear the CEL. Last edited by terryd5150; 10-04-2015 at 09:27 PM..
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10-04-2015, 09:29 PM	#13
Welterweight Major 98 Rep 1,321 Posts Drives: Truck in snow, coupe in summer Join Date: Jan 2013 Location: Boston iTrader: (3) Garage List 2012 BMW 328i [0.00] 2005 Dodge Ram Quad ... [0.00] 2009 BMW 335xi E92 [10.00]	Thank you sir! DP fix is ordered!
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