Hey everyone.. I was in line at the drive thru when the check engine light came on.. got these 2 codes. Now yesterday I was almost on E and I got some gas at this "suspect" gas station. Code I have gotten some bad gas?? One thing that made me nervous was there was no indicator that I was in fact pumping 93octane. I am currently runnings Bama's 93 race tune and have had zero issues till today. I reloaded the tune and the codes are gone.. for now. Any ideas or suggestions? if its the gas what should I do? I only got about 1 quarter of it so will I do damage if I keep driving with this gas? Any help would be awesome.

 

How do you not know what octane gas you pumped? It had no label? Anyway, if you are unsure about the octane level of the gas you pumped, you can always back the timing down by a few degrees on the X-Cal. Or you could switch to a lower octane tune for a while until you fill up again.

I checked for the fault codes you provided, and they do not show up as being valid codes. Are you sure that is what they read??

 

always check the cai to make sure nothing has slipped off or is loose if a CEL comes on.

 

yheah I checked everything.. I ended up filling the rest of the tank with gas that I know I can trust.. car seemed fine and now got 2 more codes P0171 and P0174 which is telling me I'm running too lean. I have already reloaded the tune once. How exactly do I reduce the timing and how much should I do??? I looked up the codes on Modularfords.com. Someone suggested I put either octane booster or gas treatment in there as well. What do you guys think?

 

I would stay away from any octane boosters or gas treatments. On your X-Cal you can adjust the spark like this:

When you reload the tune, it should ask you if you want to modify any additional parameters...or something like that. Select yes.

Scroll down and find the "spark" values. Take the spark down by 2 degrees at all the intervals (0-2000, 2-4000, 4-8000).

Once you are done modifying stuff, push cancel. It will ask if you want to save changes, select yes, and load the tune like you would any other time.

 

Steve, thanks for the info... now if I do lower the spark on my tune how long should I run it like that??

 

Based on those two separate codes being set My guess is you have a couple of upstream O2's that have failed. If I am not mistaken the 2195,2197 are Oxygens Sensor fault codes and of course the 171 are lean codes hence the O2's are not working causing the lean condition.

Richard

 

Richard, if that's true, what do I do? Is this something I take to Ford or should I replace the sensors??

 

You could replace the two upstream Oxygen Sensors yourself or take it in. I would do it myself it is pretty easy. Then clear the codes and hope that is all it is. If your going to take it into the dealer I would suggest going back to all stock and then drive the car and hope it triggers the CEL again and then take it in and have them take care of it. If I am not mistaken the O2's are in fact covered under the Emissions Warranty but they may very well try and void that since you have a CAI and Tune and they may say the car was running rich and ruined the O2's

Richard

 

Wow, if running rich or lean destroyed 02 sensors, 90% of us'd be at the dealer monthly for work.

Kevin nailed it when he mentioned the CAI...
I had the same codes and they did not go away till I uninstalled the CAI and reinstalled. One of the fittings was leaking just a wee bit.

Check your clamps around the filter, if they are too tight, they can cut into the filter and cause a leak. It's hard to spot.

 

i dont know.. this is just so wierd that all of my problems occured after I got some gas that was suspect at best. I'll check the CAI again, I did before and I didnt see anything wrong.

 

I am not saying that the tune caused the O2's to fail. Read what i said. I am merely speculating that is what the dealer may try to say. If it was Only the 171 and 174 codes then I would say it was merely a intake leak at some point past the MAF. However he also had the 2198 & 2197 which are O2 Failure codes specifically.

Richard

 

Good point about the dealer!
I had the same exact problem a few months back after switching from a Diablosport canned C&L tune to a Dynospeed racing custom tune. I was like "those guys moofed my friggin car". But after a little trouble shooting i had a loose connection on my intake.

 

I would say check your intake first. Try loosening it all the way up and reinstalling it. If you have a leak, it would make it run lean. After further thought...the advice I gave you about the spark timing is correct. However, adjusting the spark will not correct a lean condition. It will only correct a detonation issue (meaning the gas is igniting prematurely in the cylinder.) Only way to cure a lean condition is either fix the air leaks in the intake, or have your tuner modify the tune.

 

thanx everyone for the advice..had no issues today but after work I'm gonna check my JLT !! cai for leaks

 

I recently had code 2197. I cleared it but still had issues. I am now replacing all of the O2s to try to correct the rough running. Here is the info I was able to find on it (2196 is the same but affects O2 HO2S-11)



P2197

Lack of HO2S-21 Switch, Sensor Indicates Lean
Detailed Description A heated oxygen sensor (HO2S) indicating lean at the end of a test is trying to correct for an over-rich condition. The test fails when the fuel control system no longer detects switching for a calibrated amount of time.
Possible causes :-
-Short to VPWR in the harness or HO2S.
-Water in the harness connector.-Open/shorted HO2S circuit.
-Corrosion or poor mating terminals and wiring.
-Damaged HO2S.
-Damaged powertrain control module (PCM).Fuel System:
-Excessive fuel pressure.
-Leaking/contaminated fuel injectors.
-Leaking fuel pressure regulator.
-Low fuel pressure or running out of fuel.
-Vapor recovery system.Induction System:
-Air leaks after the mass air flow (MAF) sensor.
-Vacuum Leaks.
-PCV system.
-Improperly seated engine oil dipstick.EGR System:
-Leaking gasket.
-Stuck EGR valve.
-Leaking diaphragm or EVR.Base Engine:
-Oil overfill.
-Cam Timing.
-Cylinder compression.
-Exhaust leaks before or near the HO2S(s).

 

thanks for the info.. how much did it run you to replace all 4?? I talked to CR at Tillman speed and he told me that thhose "octane Boosters" and crap and he's probably right cause ever since I put that in the car my idle has been even worse. So bad if I saty idling for 2 long the car stalls. He suggested to get the gas out of the car asap. Also he sugg I datalog to see if it is the sensors. Too bad I dont have a labtop!! crap!!!! man this sux. Maybe I should just get a hoopdie for now.

 

Told you to stay away from the octane boosters! Get that gas out either by siphon or take a long road trip. Refill with good stuff, no additives, and see if it helps. If it is still running strange, check your spark plugs. Sometimes that crap can eat up plugs.

 

yeah Steve, I should have listened, CR said the same thing. I think I'm gonna have to siphon some of that gas out.. hey I can always use it for the snow blower! ha ha. We will see if that helps. if not then my next step will be to have the 02 sensors checked. Now if it is the sensors, do I have to replace all 4? Couldnt I just do the front 2 and have CR turn off the rear ones with a tune?

 

You can do just the the two upstreams which is what those caodes are related to.

RIchard