Your Citroen C6 engine control system detects a problem, the computer stores the diagnostic trouble
code U1422 in its memory.
To figure out what is wrong with your vehicle you must first extract the U1422 DTC For Citroen C6.
To solve U1422 Citroen C6 problem, you'll have to remove the muffler, crankcase and other components blocking the valve chamber. Then, remove the cylinder head bolts (label for easy re-installation) Adjust the jaws of the valve spring compressor until they touch the top and bottom of the valve chamber Push the tool in to compress the spring and tighten the jaws Remove the retainers and lift out the valves , compressors and springs
U1422 Citroen C6 DTC Meaning
Network Code - Problem is climate control system, lighting, airbags, etc.
MFG - Manufacturer Specific
Fuel And Air Metering (Injector Circuit Malfunctions Only)
Cruise Control Servo Indicates Low
Kick-Down Switch Failed Short
The original multi-displacement system turned off opposite pairs of cylinders, allowing the engine to have three different configurations and displacements. U1422 Citroen C6 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.