Vacuum Leak Diagnosis Cost

Vacuum Leak Diagnosis Estimate (National Average)

Validated estimate range for national average.

The average cost for a Vacuum Leak Diagnosis is between $88 and $111. Labor costs are estimated between $88 and $111 while parts are priced between $0 and $0. Get a personalized estimate based on your location and specific car. Estimate does not include taxes and fees.

Parts & Labor Breakdown
Labor: $88 - $111
Estimate does not include taxes and fees.
Best Practices

When locating a vacuum leak, we recommend using a smoke machine to find all of the areas that are leaking. 

After all of the known vacuum leaks are repaired, we recommend performing a drive cycle test drive to verify that the air-to-fuel ratio has returned to normal.

Common Symptoms

When an engine has a vacuum leak, it may:

1. Idle rough

2. Be hard to start and/or keep running when cold

3. Misfire

4. Hesitate under acceleration

5. Get poor fuel economy

The Check Engine Light may illuminate setting a P0171 or P0174 code, indicating that the fuel system is running too lean due to the vacuum leak. 

Common Misdiagnoses

Vacuum leak symptoms can be caused by a defective mass air flow sensor, ignition misfires, a defective idle air control motor, or a stuck-open EGR valve.

This is a national average for all makes and models, but you can make it more accurate by adding your car info and ZIP.
See full list of repairs
See full list of repairs