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Old 04-28-2013, 06:34 PM   #1
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CEL and 2 codes, need help

Hey guys, I just bought a 98 GT. Anyway it threw a CEL and codes p1151 (running lean) and p1152 (rich), also on the OBD scanner o2 sensor and o2 heater won't clear, and occasionally I get a little white smoke out of the driver side tailpipe. I'm figuring oxygen sensor, what do you guys think?
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Old 04-28-2013, 06:59 PM   #2
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A little white smoke when u initially start up or any time? If anything you may wanna check your coolant levels just in case it isnt condensation. Also look for a exhaust leak coming from the o2 upstream since its the upstream o2 is the ones that read what the motor does
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Old 04-28-2013, 07:12 PM   #3
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Not on startup so it's not a valve seal, it's only when I really get on the gas and get the RPM's up high. I cleaned the MAF and there are no vacuum leaks

---------- Post added at 05:12 PM ---------- Previous post was at 05:11 PM ----------

Coolant levels are good too
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Old 04-28-2013, 07:23 PM   #4
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Not on startup so it's not a valve seal, it's only when I really get on the gas and get the RPM's up high. I cleaned the MAF and there are no vacuum leaks

---------- Post added at 05:12 PM ---------- Previous post was at 05:11 PM ----------

Coolant levels are good too
Could be a possible sensor however just to be safe run a thorough check on anything to rule it out. But probably is the sensor since it reads lean and rich from the same bank
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o/r x-pipe flow master 40 series dump downs, cai/ram intake, 75mm c&l throttle body and plenum, pi heads and intake swap, msd wires, stock gears, untuned at the moment, no dyno numbers for now.
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Old 04-28-2013, 07:33 PM   #5
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Thanks I'll check it out, it did sound like there was a minor exhaust leak up around my passenger side cat. Dumb question but could a faulty sensor on the passenger side cause the smoke on the driver side? My last stang was a 90 GT so it didn't have all the computer bs
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Old 04-28-2013, 07:40 PM   #6
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Do you have an x or h pipe? Either or both cross over the ehaust from both side to equalize flow so it is quite possible to occur
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o/r x-pipe flow master 40 series dump downs, cai/ram intake, 75mm c&l throttle body and plenum, pi heads and intake swap, msd wires, stock gears, untuned at the moment, no dyno numbers for now.
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Old 04-28-2013, 07:49 PM   #7
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Nope it's stock
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Old 04-28-2013, 08:50 PM   #8
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So h pipe stock then so it is possible
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o/r x-pipe flow master 40 series dump downs, cai/ram intake, 75mm c&l throttle body and plenum, pi heads and intake swap, msd wires, stock gears, untuned at the moment, no dyno numbers for now.
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Old 04-28-2013, 08:59 PM   #9
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Ok so it sounds like it's just a matter of an p2p sensor, I'll just have to figure out which one. Awesome thanks for the help
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Old 04-28-2013, 10:10 PM   #10
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O2...stupid auto correct lol
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Old 04-29-2013, 11:18 AM   #11
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UPDATE: alright so I was driving on the freeway today and the stang was real sluggish, had to floor it in 4th gear to maintain 70 mph. Definitely a bad oxygen sensor? (used alot more gas than usual too)
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Old 04-29-2013, 02:21 PM   #12
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UPDATE: alright so I was driving on the freeway today and the stang was real sluggish, had to floor it in 4th gear to maintain 70 mph. Definitely a bad oxygen sensor? (used alot more gas than usual too)
If you literally had to "floor it in 4th" to maintain 70 MPH then the problem is something much more serious than an O² sensor...
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Old 04-29-2013, 02:39 PM   #13
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Sorry I meant 5th gear. In 4th I could only pick up speed slowly and it was idling rough too. On the freeway it was kind of on and off, it would drive fine for a min then get sluggish again
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