Your Mercedes Benz Glk Class engine control system detects a problem, the computer stores the diagnostic trouble
code P0490 in its memory.
To figure out what is wrong with your vehicle you must first extract the P0490 DTC For Mercedes Benz Glk Class.
A good ground connection is also extremely important. P0490 Mercedes Benz Glk Class engine problem because the presence of voltage at the panel harness won't make the panel work if there is a bad ground connection. Since the instrument cluster is mounted in a plastic dash, a separate ground wire or ground circuit through the wiring harness is usually needed to complete the power circuit. Refer again to the wiring diagram to find the ground path, and then check it with your ohmmeter. Do not use a self-powered test light because it cannot measure resistance (any resistance will lower circuit voltage).
P0490 Mercedes Benz Glk Class DTC Meaning
Powertrain Code - Problem is related engine, transmission and emissions systems.
SAE - Generic
Fuel And Air Metering (Injector Circuit Malfunctions Only)
TP Sensor Learn Not Complete
Transmission Engaged At High Throttle Angle
The original multi-displacement system turned off opposite pairs of cylinders, allowing the engine to have three different configurations and displacements. P0490 Mercedes Benz Glk Class code had an elaborate diagnostics procedure, including showing engine trouble codes on the air conditionning display. However, the system was troublesome, misunderstood by customers, and a rash of unpredictable failures led to the technology being quickly retired.