U1421 DTC For Mercedes S 350
Mercedes S 350 Engine Specifications:
| Engine Type : | Single Cylinder Engine |
| Cylinder Type : | Opposed Cylinder Engine |
| Engine Air Intake Process : | Turbocharged Engine |
Your Mercedes S 350 engine control system detects a problem, the computer stores the diagnostic trouble
code U1421 in its memory.
To figure out what is wrong with your vehicle you must first extract the U1421 DTC For Mercedes S 350.
On 1999 and later U1421 Mercedes S 350 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.
U1421 Mercedes S 350 DTC Meaning
| U |
Network Code - Problem is climate control system, lighting, airbags, etc. |
| 1 |
MFG - Manufacturer Specific |
| 4 |
Fuel And Air Metering (Injector Circuit Malfunctions Only) |
| 2 |
Cruise Control Servo Indicates Low |
| 1 |
PCM Stack Overrun |
While fuel economy was increased, acceleration was seriously compromised, and the loss of engine vacuum led to a dangerous loss of braking assist when the U1421 Mercedes S 350 code system was in four-cylinder mode. In addition to these issues, while the company proposed a hydraulically controlled system that could be switched from within the car, the version they implemented had to be manually changed in the engine compartment using hand tools.
You can also check other Mercedes car models :
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The listed Mercedes models will give information about U1421 DTC.
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