Q: 2054 fault code

asked by on

Mercedes benz C220 w204 2008, on diagnose result have this message " 2054 the AD converter of the control module n3/9 (cdi control unit) is faulty" the OBD light goes on sometimes not non stop...and in 5th or 6th gear the car loses speed-gas...how to fix it
My car has a manual transmission.

Hello. The code you are getting is for what is known as the PremAir sensor. This is the ozone air detection sensor. They are a common failure on this vehicle. The sensor can usually be tested with a scan tool which is what I would typically do before replacing it. If the sensor passes the tests then it may be a circuit issue. Most of the time the sensor itself just needs replacing.

If you are going to have this repaired, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose your check engine light and make the necessary repairs.

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. 2054 fault code

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: cant figure out why right passenger side wheel wobbles when I hit 35-45 miles.

Try to put the the vehicle in neutral when you feel the vibration to see if the vibration goes away and comes back when put back in drive. If the problem goes away then you may have a defective axle...

Q: Windshield washer not working

Hi there. For your windshield washer problem, it seems like you have a faulty windshield washer pump that needs to be replaced. A mechanic would be ideal in changing the pump, belts, and also the headlight all at once. As...

Q: Getting Red Lighting Bolt Warning Light and Check Engine Light

Hi there. Assuming the Check Engine Light and red lightning bolt were on before your vehicle experienced the no start condition. This would indicate a malfunction in the electronic throttle control system. The computer has recognized the fault and stored...

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 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.