Your Armstrong Siddeley 17 engine control system detects a problem, the computer stores the diagnostic trouble
code U3977 in its memory.
To figure out what is wrong with your vehicle you must first extract the U3977 DTC For Armstrong Siddeley 17.
U3977 Armstrong Siddeley 17 engine diagnostic code is about in terms of how often you should get your tyres rotated, it's different for every vehicle and type of tyre, but having them rotated at every oil change is a good rule of thumb. Check with the tyre manufacturer for a more specific time frame. Remember that the more often you rotate your tyres, the more evenly they'll wear, and when you have the tyres rotated, you should also get them checked for balance and alignment.
U3977 Armstrong Siddeley 17 DTC Meaning
Network Code - Problem is climate control system, lighting, airbags, etc.
SAE - Generic
Exhaust Gas Recirculation System Valve 1
Cruise Control System - Vehicle Accel Too High
There are currently two main types of cylinder deactivation used today, depending on the type of engine. U3977 Armstrong Siddeley 17 code for the pushrod design which uses solenoids to alter the oil pressure delivered to the lifters. In their collapsed state, the lifters are unable to elevate their companion pushrods under the valve rocker arms, resulting in valves that cannot be actuated and remain closed.