Q: MAF change during cold weather with a P01P0 code on a 2011 Nissan Altima

asked by on

2011 Nissan Altima. PO1O1. MAF change usually comes on a cold day.

A: On a cold day, electronics have a tendency ...

On a cold day, electronics have a tendency of being affected the most. MAF sensor wires are only 5-volt and only have a tiny amount of power, around 15 to 30 millivolts which is a thousandth of a volt. At times the wiring connections can get dirty and you'll want to clean them with spray electrical cleaner. Also, check the wiring resistance very well. Follow the wires to see if the installation has fallen off. If you see some bare wires you'll have to have them rewired.

It's a very common problem and you want to pray that it's not the main computer going out. In cold weather conditions, bad computer circuits can often cause this problem to occur and would be a very expensive fix that you can't do yourself. Computers have to be reprogramed when you buy a new one, for both your car and the anti-theft system. If you buy one, put it in, and turn the key, nothing would happen. A certified mechanic would be able to diagnose the code the trouble code and install a new computer if need be.

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: slow cranking randomly

You will have to have the fuel pressure tested to see if the system is holding fuel pressure at the injectors after you shut it off and see if the fuel pressure meets specifications. If the fuel pressure leaks down,...

Q: fuel pump

It's hard to specify without knowing the exact model of your vehicle, but I will say that $300 for a timing belt and $300 for a fuel pump both sound very fair, but you may be trading low price for...

Q: My titan recently began to shutter while I was accelerating. When it stopped I couldn't get it to go faster than 40mph.

My first thought is, what code is the TCM (transmission control module) setting? Usually when a vehicle won't go faster than 40 mph, the vehicle has set itself into limp mode. It does this to protect itself from what it...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.