Skip the auto shop - Our mechanics make house calls

Q: P2178 and P115D codes are showing up on a scanner. Could both be related to the MAF sensor?

asked by on

Could both be related to the MAF sensor? Runs rough for about 30 seconds after start when cold then smooths out and runs fine. Recent head job, and timing chain, guides and tensioner work done but was doing this before hand. The HPFP is about a year old and I was pretty careful with the connectors and vacuum connections. It is a heavily modified engine. Just about every bolt on upgrade you can imagine and Manic stage 2 tune.

My car has 153000 miles.
My car has a manual transmission.

Hi there. The code P115D is for the mass air flow sensor (MAF). It says that the sensor has an offset signal. The code P2178 says that bank 1 is too rich. This means that the engine is running too rich (has too much fuel or not enough spark). Check the spark plugs to see if they are working and if they are soaked in fuel. Also, check the fuel pressure regulator to see that its functioning. I recommend performing a fuel injection flush first to make sure that there is no contaminants in the fuel rail. Also, I recommend replacing the MAF sensor for its not sending a correct signal to the computer, as if it has a broken connector or a short. If you need further assistance with the codes that you are getting on the code reader, then seek out a professional, such as one from Your Mechanic, to help you.

Was this answer helpful?

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
  • Home
  • Questions
  • P2178 and P115D codes are showing up on a scanner. Could both be related to the MAF sensor?

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: Can your fork from your gear box break and be pressured into the clutch and break? 2005 Mini Cooper

Hi there - if you are speaking of a shifter fork in the gearbox - it is not possible that a gear selector fork has damaged the clutch. It is conceivable, however unlikely, that the clutch throwout bearing fork has...

Q: crankshaft seal

Hi there: Anytime you remove and replace a water pump - click for estimate it's always a good practice to replace gaskets of components accessible that will eventually wear out around the same time, including a crankshaft seal; and vice-versa....

Q: Very little heat from vents 2004 Mini Cooper

Hello - the lack of heater function could have 5 causes: the engine is not getting up to correct temperature (center of the gauge) due to a malfunctioning thermostat - not likely in your case since the temp gauge is...

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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
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.