Corral

Red2002gt · 07-13-2009, 08:51 PM

Hey guys, i have these codes, happened shortly after CAI, TB, and Plenum install
P0155.... says o2 heater circuit, bank 2, sensor 1

P1151.... says lack of Ho2s21 switches...sensor indicates lean

do i just need a tune or is it is a o2 sensor
thanx in advance

Red2002gt · 07-13-2009, 10:45 PM

anyone, please help a poor noob

Chrm97PI · 07-13-2009, 11:50 PM

probably a sensor, but make sure its plugged in first

iflyjets · 07-14-2009, 08:11 AM

Check the pins on any plug that you unplugged.
It may be just a bent pin.

Zinc01 · 07-14-2009, 09:38 AM

The second code indicates that the o2 sensor is not working. As mentioned above check for a disconnected harness or bent pin. The next step would be replacing the oxygen sensor.

FYI, I had the same code. Visually checked everything and then replaced the oxygen sensor. Still had the same damn code. I pulled the transmission/o2 harness, but couldn't find the short. Every time I checked the wires, they showed continuity. I ended up buying an o2/transmission harness on ebay for $20. No more problems after that. Just something to keep in mind, if all else fails.

Red2002gt · 07-27-2009, 09:10 PM

thanks guys, will replace o2 sensor

rlovejoy · 07-28-2009, 06:41 AM

I had that problem one time and it was the 02 heater fuse in the box under the hood.

huesmann · 07-28-2009, 08:17 AM

Why would an O2 sensor go bad after a CAI, TB, plenum install?

2k2GT · 07-28-2009, 08:42 AM

Because it says MUSTANG and/or FORD on the vehicle.

1sxyfox · 07-28-2009, 01:07 PM

i am gettin the p1151 also but mine comes and goes for some reason anyone got any ideas for that? i was thinkin that it could be one of the pins bent like ya'll said but wasn't sure, any input before i check?

huesmann · 07-29-2009, 08:29 AM

LOL Tony.

07-14-2009, 08:11 AM	#4
iflyjets Registered User Trader Feedback: (12) Join Date: Sep 2004 Location: maine Posts: 601	Check the pins on any plug that you unplugged. It may be just a bent pin. __________________ 2001 GT 5.4 DOHC 1998 Cobra with a Procharger

07-14-2009, 09:38 AM	#5
Zinc01 Registered User Trader Feedback: (18) Join Date: Feb 2006 Location: New York Posts: 837	The second code indicates that the o2 sensor is not working. As mentioned above check for a disconnected harness or bent pin. The next step would be replacing the oxygen sensor. FYI, I had the same code. Visually checked everything and then replaced the oxygen sensor. Still had the same damn code. I pulled the transmission/o2 harness, but couldn't find the short. Every time I checked the wires, they showed continuity. I ended up buying an o2/transmission harness on ebay for $20. No more problems after that. Just something to keep in mind, if all else fails. __________________ Forged Teksid 2v, Patriot Stage 3 heads/stock cams, KB 2.8H, 1 3/4" Kooks longtubes, 3" x-pipe, 3" 1 chambers dumped. 3.73 gears,PA Manual VB 4R70W w/ brake, Circle D's converter, Lowered 1.5" on 17x8 & 17x10.5 Bullitts. Kaenen 4.5" cowl hood, much more

07-28-2009, 06:41 AM	#7
rlovejoy Registered User Trader Feedback: (1) Join Date: Jan 2006 Location: AMERICAS GA Posts: 557	I had that problem one time and it was the 02 heater fuse in the box under the hood. __________________ R Lovejoy 01 GT Daily Driven N/A With Automatic. SCT PRO RACER TUNNING< the best move I ever made 11.96 @ 112.89

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07-13-2009, 11:50 PM	#3
Chrm97PI Registered User Trader Feedback: (0) Join Date: Mar 2007 Location: minnesota Posts: 1,277	probably a sensor, but make sure its plugged in first

07-28-2009, 08:17 AM	#8
huesmann Registered User Trader Feedback: (5) Join Date: Jul 2004 Location: DC burbs, MD side Posts: 6,430	Why would an O2 sensor go bad after a CAI, TB, plenum install?

07-28-2009, 08:42 AM	#9
2k2GT Registered User Trader Feedback: (0) Join Date: Aug 2002 Location: Lenoir City, TN Posts: 6,543	Because it says MUSTANG and/or FORD on the vehicle.

07-28-2009, 01:07 PM	#10
1sxyfox Registered User Trader Feedback: (5) Join Date: Jan 2009 Location: Jacksonville,NC Posts: 145	i am gettin the p1151 also but mine comes and goes for some reason anyone got any ideas for that? i was thinkin that it could be one of the pins bent like ya'll said but wasn't sure, any input before i check?

07-29-2009, 08:29 AM	#11
huesmann Registered User Trader Feedback: (5) Join Date: Jul 2004 Location: DC burbs, MD side Posts: 6,430	LOL Tony.