Q: I have a p0174 code that was reviewed on a scanner.

asked by on

I have cleaned the MAF sensor twice, I have replaced all 4 02 sensors. I have checked for vacuum leaks by hazing the engine with brake cleaner. I am still getting a primary code p0174 and a second p0132 code on my OBD. Any advice would be greatly appreciated. Thank you

Hi there. The code P0132 in on for an issue with the upstream oxygen sensor. There could be a broken wire, frayed wire touching something metal, or the sensor could have failed. The code P0174 is on for the Mass Air Flow sensor (MAF). The MAF sensor could be dirty, has failed, or the intake plumbing could have leaks between the MAF sensor and the Barametric Pressure Sensor (BPS). Since you have cleaned the MAF sensor twice, then check the all of the clamps to the intake plumbing and make sure that there is no leaks. If there is no leaks and the clamps are tight, then I recommend replacing the MAF sensor.

If you have replace all of the oxygen sensors and the code is coming on for a failed or disconnected sensor, check the wiring to all 4 sensors and see if there is a frayed wire or a broken wire. All it takes is 1 broken wire to set the code.

If you need further assistance with your engine codes solutions, 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 1,000 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!
  1. Home
  2. Questions
  3. I have a p0174 code that was reviewed on a scanner.

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: Q: check engine light on

Hello. To turn off the light you would need to use a scan tool. Using a scan tool give the technician access to the computer to be able to reset the light since there is no issue with the vehicle....

Q: Power windows and radio stopped working after replacing multifunction switch on column

Hi Jaime. Thanks for contacting us today. It's quite possible that during the original removal of the switch, an electrical wire may have been cut or frayed, causing a short to occur. This is typically what causes the type of...

Q: Engine codes detected were P0016 P0017 and P0174.

The codes P0016 and P0017 are related to the crankshaft location and the camshaft location. Check the camshaft position sensor and see if its plugged in. If the wiring harness is in good shape and the wires are plugged in,...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...