W221 Fault Code Help

[722]

Does anyone know what the following fault codes apply to;

3019
3021

They were checked on a Non-Star scanner and accidentally cleared before I could get it on a Star unit. Would the fault codes be stored for Star?

I have looked around and can't seem to find these particular codes, irrespective of a letter prefix. I am assuming its P (powertrain).

Many thanks

 

[SUPERNOVA1a]

3019=B3019 There is this fault code "Door key switches(LF RF) circuit High.
3021=B3021 Fuel enable circuit malfunction
These are showing as "Generic, This code applies to all makes and models/ no manufacture specific record.

 

[BlackC55]

What are the symptoms?

 

[722]

Many thanks for the quick replies.

There are no symptoms with the car, just after normal ignition the Check Engine Light appeared on the dashboard. Since then it hasn't reappeared.

 

[722]

3019=B3019 There is this fault code "Door key switches(LF RF) circuit High.
3021=B3021 Fuel enable circuit malfunction
These are showing as "Generic, This code applies to all makes and models/ no manufacture specific record.

I think this changes depending on which website or list of OBD2 codes you refer to. I have seen this come up with a title of GM, I am ssuming General Motors.

On another site I have seen them come as;

B3019 - specifically refers to the camshaft (cam) timing. In this case, if the cam timing is over-retarded, the engine light will be illluminated and the code will be set.

B3021 - engine trouble code is about Exhaust Gas Recirculation Sensor B Circuit High.

Can anyone shed any more light or confirm which ones are specific to Mercedes?

Many thanks