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?
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. 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: Are these issues related and could dealership have seen there were glow plug issues when the hooked my truck to their computer.

Hi there. The issue with the 6.0 L diesel engines is that they are to work fine in all conditions, but when the glow plug relay or the circuits fail, the computer will put the engine into limp mode causing...

Q: My 2000 ford expedition is showing 0171 and 0174 codes do you have a estimate to fix?

The codes P0171 and P0174 point to a lean condition picked up by the oxygen sensors in the vehicle's exhaust system. Since there is a warning from both banks, it may be safe to say that this is could be...

Q: Q: Sunroof stuck open.

You may have a bad relay or faulty switch for the sunroof. If the sunroof doesn't move at all I would have a technician come out and test voltages from the switch and relay and to diagnose the problem.

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 Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.