Q: trouble codes PO101

asked by on

Initially diagnostic came with codes P1334-P1312 After changing the spark plugs and having an oil change done, diagnostic code came with code 3305 While I was shopping for Direct Ignition Coil cassette, I stopped again to run another diagnostic today before letting the mechanic install the ignition cassette SKU 55559955, The code this time came code PO101 as follow: Mass or Volume Air Flow A Circuit Range/Performance. The engine red light went away after the diagnostic. The car did run fine all along with the engine light on. Car run great shape. What do I do? You all have been so helpful and even scheduled Your mechanic to come over. Thank you. Have a wonderful Holidays. I would follow your instructions. Thank you. Marc

My car has 35015 miles.
My car has an automatic transmission.

Hi there. There are 5 things that can cause the engine light code P0101 to come on. The mass air flow sensor (MAF) could be dirty, the MAF could have failed, the air intake could have a leak, there could be a break in the wiring on the MAF or a loose connection, or the catalytic converter could be plugged up. First, check the wiring harness to the MAF and make sure that it’s tight. Then check all of the intake hose plumbing and make sure that they are all secured tight. If those are in good shape, then remove the MAF and clean it with a non-chlorinated electrical cleaner. Then put it back on and see if the engine light goes out. If the light is still on, check the harness for power with the engine running. If there is power, then hook up the harness to the sensor and back probe the wiring with a tiny paper clip and check for power coming out of the sensor. If there is no power coming out of the sensor, then the sensor is not working and needs replaced. If there is power coming out of the sensor, then check the exhaust system for a plugged catalytic converter. Place something flat against the exhaust pipe with gloves on and check to see if there is a pressure build-up. If there is no pressure, then the catalytic converter is plugged. If there is pressure and everything checks out to be good, then the computer may have a bad connection and needs to be replaced or fixed. Most likely the sensor is not working or there is an air leak. If you need further assistance with diagnosing your MAF, then seek out a professional, such as one from Your Mechanic, to help you.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. trouble codes PO101

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: I have white smoke from my exhaust, its also leaking from the engine bay.

A malfunctioning EGR system may cause excessive raw fuel emissions, that is an odor of gasoline, but not smoke (white or otherwise) from the exhaust. Some smoke at start up can be normal, particularly white smoke from condensation. However, continuous...

Q: Do I need to repair or replace my ECM?

You can get an ECM-related code for a number of different reasons. It can be something as simple as a voltage loss from a bad battery connection, or it may need a new ECM. I usually check the codes and...

Q: RPM's fluctuate while idling and sometimes it dies. Getting codes for multiple misfires and knock sensor.

Hi there. Check the fuel injectors and see if they are working or not. While the engine is running, unplug one injector harness at a time. If the engine begins to hesitate, then the injector was working. If the engine...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...