Question about 2012 Nissan Altima 2.5 Sedan 2.5L 4-cyl. CVT Automatic

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What are the probable causes of DTCs P0031, P0603, and P1148?

Car runs great cold soon as it warms up service eng light comes on car lopes surge no power

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Clean out you idle air bypass valve with carb cleaner. P0031 air/fuel sensor 1 heater (B1)bank 1, p0603 engine control back up circuit,p1148 closed loop B1. Broken heater in upper O2 sensor is one if not all of your problems. Replace all of your O2 sensors & reset engine light.

Posted on Sep 14, 2015

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Posted on Jan 02, 2017

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SOURCE: Service engine soon, SLIP, TC OFF LIGHTS ON

I had the same indications on My 2000 Maxima but the engine was also running rough . I replaced the number 3 cylinder ignition module and all of the spark plugs and all of the error lights are back to normal I had to reset the check engine light by disconnecting the battery for about 15 minutes.By the way my car has 253,000 miles on it so if you have a lot of miles on your car you might want to check all of the ignition modules so pull your spark plugs and read them they might tell you where your problem is .

Posted on Dec 24, 2008

  • 192 Answers

SOURCE: Service Engine Light soon came on.

these cars have alot of problems with the cranshaft sensor .

Posted on Sep 28, 2009

oneStan
  • 434 Answers

SOURCE: At times when brake is applied,engine dies and

It sounds as if the brake booster is leaking. When you press the brake pedal, vacuum is drawn from the engine supply, if the booster is leaking, it allows too much vacuum to leak, stalling motors & triggering sensors. There is a check valve located between the line that comes from the engine manifold over to the brake booster & that can also cause problems.

Plug that line & use your brakes, if it cures the problem, you've found your issue.

Other than that, if you have another vacuum leak, the use of the brakes could just make it so bad that it then triggers symptoms so you shold check your vacuum lines. Vacuum leaks can be identified by usiing a can of carb. cleaner with a nozzle, spraying a small amount in bursts near vacuum lines, connections, and plugged lines. If there is a leak, the engine will stall or slow when it draws in the carb cleaner and you should be able to identify where the leak is. Go slow, spray only a little at a time & allow it to dissipate as it is a flammable product.

good luck

Posted on Feb 15, 2010

Testimonial: "That makes good sense, I am a retired General Medhanic of forty years. But not ;up on all the latest electronics. Thanks"

SOURCE: Engine Codes: P0031, P0142, P1148

Your mechanic is right, replace the upstream sensor (it is screwed into the exhaust manifold) and your codes will go away. Click on the link below to read more:

http://forums.nicoclub.com/p1148-p0031-possible-bad-o2-oxygen-sensor-t513072.html


michael34.png

Posted on Dec 07, 2010

  • 1 Answer

SOURCE: codes p0031 p1148 ? What/where are they?

I am having the very same problem with my 2007 Nissan Versa right now as well. However, I have one more additional code: P0142. P0031 refers to the front oxygen sensor heater circuit, low imput. P1148 says: Air/Fuel sensor s connection is shortened or open. I have been digging around online, and have come up with a possible bad upstream O2 sensor, a bad bank 1, sensor 3 malfunction (and replacement), and a possible connection problem. I have NO idea why all of these problems would arrive from a car that's only 3 years old. I've been trying to search for any recalls, considering if it's taken to a dealer to fix, the end cost will be over $600. That's just plain crazy!!

Posted on Dec 09, 2010

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1 Answer

22re starts good but after a minute starts to lopes


surge, lopes, hunts, all same. but does it do this hot/cold or both engine temps.?????????
Im and expert on this.... done many and is related to EFI fuel controls
big time..... (ive even programmed Megasquirts to do this)
first the rules then causes.
Rule 1, The EFI controls idle at all times. so that proves.
Macro reasons.
1: EFI lost control. (stuck ISC?)
2: Engine is missiing (too rich, too lean or never tuned up)
3: or both, usually #2 causes 1 ,

there are ways to solve this riddle
my ways are simple
i test the ISC, see if it works, (unplug it or power it with 12v power supply, ) Id clean the ISC first.

this old car 1992 , scan tools are hard to find for OBD1 cars.
so cant look to see if CLosed loop is working, I can with a scope
but you dont have a scope.
you could put in the diagnostic check jumper and hope for an error code to flash out.
you can look as spark plugs (newones work wonder) and see
if its burning fuel correctly (like old school carb days)
black?> white tips>
all engine carbs and EFI all will surge when lean,.
all, and on EFI it will in fact try to stop the surge,
if lean enough the EFI can actually make the surge worse
is it tries desperately to correct the impossible.@!

that be surge.
i learnd that loping my mule one day.. LOL

Jan 21, 2014 | 1992 Toyota Pickup

1 Answer

How to adjust idle?


hot engine ?, cold or both,, EFI runs in 3 modes, cold ,warm and hot.

name it.

which engine option (displacement)??????



there is no idle adjust, that is the PCMs, job 100%, all the time.

Carbs are gone.

here is rule one for all EFI.

idle is the last thing to work correctly.

anything the causes a gross imbalance of engine power to engine load, under idle will cause , idle controls to fail.



low idling causes. (over 50 but, here ar basics)

1: AFR (air fuel mixture too lean) usually surges. (clogged or leaking injectors. or fuel pressure way to high)

2: air leaks, cause racing, so not that. (speed density car ,if is)

3: egr stuck open. low idle and misfire.

4: ISC stuck closed (IAC electric)

5: cam belt slipped, timing retarded, compression at 1/2 spec, and well, valve will bend soon....

6: CEL glowing running? can be in limphome, limp cancels Idle controls (in may cases) RTM read the FSM on DTCs.



if fails hot?, is hot = 180F temp or more? "thermometer time"

if not, the PCM goes , quite nuts.

Dec 23, 2013 | 2010 Honda Civic LX

1 Answer

1995 pontiac lt1 sluggish no power slight back fire


sounds like a fuel problem, may have water in the gas or needs a fuel filter , try a bottle of drygas before the filter

Jan 04, 2013 | 1995 Pontiac Firebird

1 Answer

Codes p0031 p1148 ? What/where are they?


I am having the very same problem with my 2007 Nissan Versa right now as well. However, I have one more additional code: P0142. P0031 refers to the front oxygen sensor heater circuit, low imput. P1148 says: Air/Fuel sensor s connection is shortened or open. I have been digging around online, and have come up with a possible bad upstream O2 sensor, a bad bank 1, sensor 3 malfunction (and replacement), and a possible connection problem. I have NO idea why all of these problems would arrive from a car that's only 3 years old. I've been trying to search for any recalls, considering if it's taken to a dealer to fix, the end cost will be over $600. That's just plain crazy!!

Dec 01, 2010 | 2007 Nissan Versa 1.8 Sl Hatchback

2 Answers

My service eng soon light stays on


Could be something a little as a gas cap, take it to Autozone they can do a free code reading, this way you'll know if it's something small or major, but if it's some thing other then a gas cap, have it check at a repair shop before buying any kind of sensor's.

Feb 12, 2010 | 2002 Ford F150 Regular Cab

1 Answer

Eng.lightis on code#p0031.


Have you diconnected the battery for 20 min to reset the puter?

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Code of p1148 on 2006 nissan sentra


Have you cleared the codes at least once?
The new o2 sensors should have removed all those codes.The sensor closest to the engine b1s1 may be defective.Check wiring and plug to that one closely.

Feb 13, 2018 | 2006 Nissan Sentra

2 Answers

Rough idle, surges when cold


have it scanned,ck' tps sensor,mass air sensor,idle air sensor for output...kev-mn.

Dec 10, 2008 | 2002 Ford Escape

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