Skip the auto shop - Our mechanics make house calls

Q: Truck not passing emissions test

asked by on

My truck did not pass an emissions test, and a full tuneup was recommended. It's a V6.

For a vehicle that is over twenty years old, a full tuneup could mean a lot of maintenance, from plug, wires, filters and injectors, to major components, in order to fix the emission failure. These engines have a problem with the injection system that can cause the system to run too rich, or too lean. I recommend having a mechanic, such as one from YourMechanic, run a thorough diagnostic check to see what the engine would need to pass the test, and put together a repair list.

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
  1. Home
  2. Questions
  3. Truck not passing emissions test

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: What Are California's Emissions Standards?

California emissions standards are the highest in the nation, and exceed the EPA’s regulations. You’ll find that many vehicles sold in different parts of the country are rated for California’s emissions standards because automakers are required to manufacture a certain...

Q: Creaks/groans when hard cornering.

Hello, thanks for writing in about your GMC Sonoma. You need to have the entire front end checked for wear. You may have worn sway bar links and bushings, upper and lower control arm bushings, and ball joints are worn....

Q: Car slightly jerks, stalls, and then restarts

Hello. A faulty coil pack is likely the cause of the issue you are having. A less likely cause could be a clogged fuel filter or fouled spark plugs. I suggest that you have a technician inspect your coil pack...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
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...
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.