Mercedes CLS 350 U2174 Code:

OBD-II Diagnostic Network (U) Trouble Code

Trouble In Mercedes CLS 350 U2174 Possible Cause

To know real cause of Mercedes CLS 350 U2174 based of if this code is present in your two-wheel drive vehicle, suspect a faulty PCM or programming error. In most four wheel drive applications the four-wheel drive switch is used to switch between two and four wheel drive operation, as well as between low and high ranges

Common Symptoms For Mercedes CLS 350 U2174

  1. The inlet door is typically closed when the key is placed in the OFF position and opened when the key is turned to the ON position
  2. Test the wiring and connectors at the fuel shutoff valve to make sure that voltage and ground readings are near battery voltage
  3. The PCM will read the sensor resistance and pass it
  4. The sensor is of the electro magnetic design and uses a reluctor ring (or a specialized set of splines) on the input shaft as reference points

Similar Problems

Transmission
Cruise Control Servo Indicates Low
Transmission Control Module Reprogrammable Memory

Mercedes CLS 350 U2174 Troubleshooting

Having one of the signs of a bad gasket is usually not enough to prove a failure of a gasket, but multiple symptoms are most likely the result of gasket failure. It is advisable to have the vehicle driven as little as possible whenever the symptoms occur. Depending on the symptoms, either have the gasket replaced or repaired.
The cost of replacing a gasket usually varies from one mechanic to the other. Replacing a gasket is quite expensive in modern engines due to their location and the amount of labor that is required to replace them. Mercedes CLS 350 U2174 OBD 2 code on vehicles with electronically controlled automatic transmissions, the 3-4 shift solenoid is responsible for actuating the hydraulic circuits to activate clutches or bands that change gears inside the automatic transmission.

How to turn off Mercedes CLS 350 U2174 check engine light ?

There are two ways to turn off the check engine light:

A repair technician can do so once repairs have been made.
The OBD II can automatically turn it off when it fails to detect the problem after several diagnostic cycles.

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