Skip the auto shop - Our mechanics make house calls

Q: Failed emissions codes P0134, P0327, P3fff

asked by on

I'm really wondering what P3fff means?

My car has 130000 miles.
My car has an automatic transmission.

The P0134 code means that the air fuel ratio sensor is not operating. Most of the time it will need replacing to correct. The P0327 code means that your knock sensor is not getting enough voltage. The P03FF may indicate an internal failure of the ECU. It is possible that the ECU issue is causing the other sensors to malfunction.

If you’d like to get your car fixed, a certified technician, like one from YourMechanic, can perform some tests to further diagnose your trouble codes and determine the exact cause of your concerns. Best of luck.

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

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. Failed emissions codes P0134, P0327, P3fff

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: Reversed jumper cables and car will not start and is not getting any power.

Hi John. Thanks for contacting us. Hopefully the fuses and electrical relays have done their job and are blown, causing this issue. In many cases, crossing the battery cables during a jump start will damage the ECU. So, yes -...

Q: Flashing green light next to "D" and check engine light on.

For this particular issue, I would start by checking the continuity of the cruise control switch buttons. You will need to check these with a volt meter to determine if they are getting power. If you need assistance with getting...

Q: Check Engine Light is on and engine is quaking and stalling - 2006 Mercedes Benz C55 AMG

Hello. If the Check Engine Light has come on, then that means the computer has detected some sort of issue. I would rescan the computer to see if the same code has returned, even after cleaning the sensor. If cleaning...

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...
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.
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.