Question about 2012 Nissan Altima 2.5 Sedan 2.5L 4-cyl. CVT Automatic
Car runs great cold soon as it warms up service eng light comes on car lopes surge no power
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
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
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.
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"
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:
Posted on Dec 07, 2010
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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