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Example: 0120

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U1120 Engine Diagnostic Code For Mercedes Benz 220

Sample U1120 Engine

U1120 engine code for Mercedes Benz 220 provides below are generic codes that may not apply to all vehicles. Mercedes Benz 220 manufacturer uses specific Mercedes Benz 220 diagnostic code that are different from the codes shown below. Foreign vehicles may also use DTC codes different from the generic DTC codes.

On 1999 and later U1120 engines, the instrument cluster has a built-in self-diagnostic mode that can be accessed by pressing and holding the instrument cluster SELECT/RESET button. Insert the ignition key and turn to the RUN position (but don't crank or start engine). Continue to press and hold the SELECT/RESET button (for 5 seconds) until the word TEST is displayed by the odometer. Release the SELECT/RESET button within three seconds after the word TEST is displayed to begin the self-diagnostic mode.

U1120 Diagnostic Trouble Code For Mercedes Benz 220 Meaning

U 1 1 20
Network Problem MFG - Manufacturer Specific Fuel And Air Metering 20 Engine Fault Code
Mercedes Benz 220 Car Engine How to fix U1120 engine diagnostic code For Mercedes Benz 220 ?

Starting letter U diagnostic code shows that there are problems in climate control system, lighting, airbags, etc..
If your "Check Engine Light" is on, it means your vehicle has one or more OBD II Trouble Codes so you have to check your engine diagnostic code tool.

If your vehicle is an older model with a non-electronic Fuel And Air Metering, you can check the distributor cap to see whether the spark is getting from there to the coil and on to the spark plugs.


Don't forget ! If your U1120 engine code not resolved on and there are trouble codes in your computer, your vehicle will not pass an OBD 2 emissions test. The light must be off and there must be no codes in memory to pass an OBD 2 emissions test. In addition, all of the OBD II self-monitors that check for faults must have run and completed without finding any further problems to pass the test.