Skip the auto shop - Our mechanics make house calls

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.

A: Hello. The code you are getting is for what...

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?

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

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: Engine System Service Urgent message

This sounds like a check engine light is on and there are codes waiting to be retrieved. Have a certified mechanic, like one from YourMechanic, scan for codes and diagnose your system message.

Q: Key not working

Hi there. This problem is caused by a lack of mobility in your ignition cylinder. The bumps on your key depress a series of channels in the cylinder in the correct combination in order for it to release it's locking...

Q: Why after changing the power steering pressure sensor I still get the check engine light stating sensor failure?

When you scanned the computer and got a code for the power steering pressure switch, it did not necessarily mean to simply replace the sensor to fix the code. The code you got directs you to a pinpoint test that...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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.