Possible repairs for P0174 & Costs
Since several different issues can cause lean code P0174, there isn’t just one possible solution.
Once your mechanic has diagnosed the problem, here are some of the common fixes:
- Check for other error codes: Your mechanic will use a scan tool to ensure no other error codes indicate problems (that may or may not be related to P0174.)
- MAF sensor issues: If it’s a mass air flow sensor problem, your mechanic will clean your mass air flow sensor with a MAF cleaner or replace the sensor if it’s broken.
- Clogged air filter: A clogged air filter could be dirtying your MAF sensor, so your mechanic will clear it out if needed.
- Faulty oxygen sensor: Your mechanic will replace your O2 sensor if it’s defective.
- Fuel system issues: Your mechanic will inspect your fuel system and fix problems such as a dirty fuel injector or clogged fuel filter.
- Vacuum leak: If there’s a vacuum leak, your mechanic will inspect your vacuum hose or intake manifold gasket and replace them if needed.
- Faulty EGR valve or PCV valve: If there’s still too much air causing a lean fuel mixture, your mechanic will replace your EGR valve and PCV valve.
- Defective valve cover gasket: Finally, if there’s an oil leak due to a damaged valve cover gasket, your mechanic will replace it with a new one.
Before a mechanic can fix error code P0174, they’ll need about an hour of diagnosing time to determine the problem. Depending on where you live and the labor costs in your area, you can expect to pay $75-$150 for this service.
Once your mechanic has diagnosed the issue, the auto repair shop will give you a repair estimate.
Here’s what you can expect to pay depending on the issue:
- Vacuum leak repair: $100-$200
- Cleaning a dirty MAF sensor: $100
- Replacing a MAF sensor: $300
- Fuel pump repair: $1300-$1700
- Fuel pressure regulator repairs: $200-$400
- Exhaust repair: $100-$200
- Air fuel sensor or oxygen sensor repair: $200-$300
- Valve cover gasket replacement: $150-$400
Note: The repair costs above include labor charges.