Fault code diagnosis 2054 & 22A5

[Psol]

hi,
I have a 2009 C220CDI W204 which has constantly had the engine management light on for a few motnhs now.
anyway the garage gave me a read out of the following fault codes
2054-007
22A5-008
and said basically it would cost £800 to repair
I cannot now remember exactly what was said as I was in shock at the cost of repair but can anyone elaborate exactly what these fault codes mean and what work needs to be done here.
I recall the mechanic stating something about the gearbox manifold being removed which the part itself costs around £500 and that I needed to supply a log book, utility bill and proof of id to get the part ordered from MB direct.

 

[mercedes13156]

2054-007 looks like a fuel temperature sensor.
I can't find anything concrete on the other code. It may be related to a DPF sensor and that might put your engine light on. I can't be certain, but someone else who knows a lot more than I do will be along soon.

It doesn't sound as if there are gearbox problems. You might be having your chain pulled here. You don't say where you are, so if you do, someone will be able to recommend a tried and trusted independent Merc Garage near you with the proper kit and a good reputation.

 

[Psol]

Thanks for the reply mercedes13156
I am based in Croydon Surrey

 

[Botus]

inlet manifold....


this would be silly money and it takes a good few hours to get off the car....
modern cars have lots of useless garbage attached that in a lab make measurable differences to economy, emissions and power.... on the road yes they do something but not enough to make the designed to fail element worth fixing

find a local specialist and bodge it up for 20 quid

 

[Psol]

so speaking back with the mechanic he has said I need a new temperature sensor for the exhaust which inc labour is around £150.00
The main job however is the gearbox going into limp mode although this has only happened on a few occasions the mechanic has said I will need either a a new conductor plate or a electro hydraulic unit which is around £800

 

[Botus]

its a phaff but the electro plate can be repaired… but you will have to wait about and have a car stuck at the garage whilst its done this could end up around 700 all done

or you could try Mercedes grangemouth (quoting this forum) for a good price on the broken bit, plus gasket filter and sump bolts... to save a lot. but u them need a good merc indie to fit it and sort the coding as its an antitheft bit …. so its will come in around 800

I suspect your quote was just the part with fitting on top?

 

[domwild]

Buy a A0009050800, if that is the right model, for the fuel temp. sensor from Aliexpress for US$20, take the air hose off, notice some brass colour below the fuel pump at the front, take the plug off, check for 3 kilo Ohm resistance at the two pins, if open circuit or short use your 19mm spanner to replace it, that is what the web tells me.

Rather than taking the air hose off, etc. I thought I may as well buy the part and have it ready regardless of what the checking with the multi meter told me as I hope I can trust my iCarsoft MB2 diagnostic with the 2054-007 fault code for the B50 part with "Open or short" message.

My engine warning light is on, so I hope it will disappear after. There is still the weird 2054-00 fault, which reads:

"The analogue/digital converter in the CDI control module N3/9 is faulty"

and I hope those two errors are related and that second fault goes away too. Used 35 litres diesel for 500 km, so 7 litres/100km is reasonable, so the CDI seems to be injecting the right amount of fuel, hope, hope. The manual warns me not to drive with the engine light on as I can damage the engine, what do you think?

A STAR diagnosis would cost me AUS$250 and then fixing the issue is a AUS$150/hr affair. Fora tell me voltages must be right as low voltages lead to all sorts of ECU problems, but in my case the voltage at rest is 12.5V and charging is at 14.5V.

How did you get those error(s) fixed?

 

[domwild]

Fixed it! Just changed the part and now have no more problems. Explained below:

Error message related to 2054-007 states: “The fuel temperature sensor B50 is open circuit or shorted out”. In my case the sensor still had about 1.6 kOhm resistance and 3 kOhm seems to be recommended, but anyway, I changed the part and have no more problems.

Take those fat air pipes off so you can see and work on the fuel temp. sensor. Pull out pin of clip RH side, remove (twist) pin in middle and on LH side squeeze edges in at connection to air filter. Have new part ready from Aliexpress for $25. Ask Dr Google for photos of location of sensor. Remove electrics. Take 19mm tube spanner out of your plumbing kit or use a very deep socket as 19mm ring is not easy to use as there is no room. Install new sensor, suggestion is 23 Nm torque.

No more 2054-007 error on diagnostic or similar. No more “Engine Fault” light on just before your next service is due!

This error is also allied with the 2054-00 error: "The analogue/digital converter of the CDI control unit N3/9 is faulty" - not so. Your ECU is not stuffed. The software has no clue if it is the temp. sensor or the chip in the ECU converting the temp. sensor’s analogue signal to digital, so it lists both.