U0421 DTC For Ford Expedition 3
Ford Expedition 3 Engine Specifications:
| Engine Type : | Multi-Cylinder Engine |
| Cylinder Type : | W-Type Engine |
| Engine Air Intake Process : | Supercharged Engine |
Your Ford Expedition 3 engine control system detects a problem, the computer stores the diagnostic trouble
code U0421 in its memory.
To figure out what is wrong with your vehicle you must first extract the U0421 DTC For Ford Expedition 3.
To solve U0421 Ford Expedition 3 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
U0421 Ford Expedition 3 DTC Meaning
| U |
Network Code - Problem is climate control system, lighting, airbags, etc. |
| 0 |
SAE - Generic |
| 4 |
Fuel And Air Metering (Injector Circuit Malfunctions Only) |
| 2 |
Cruise Control Servo Indicates Low |
| 1 |
PCM Stack Overrun |
There are currently two main types of cylinder deactivation used today, depending on the type of engine. U0421 Ford Expedition 3 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.
You can also check other Ford car models :
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The listed Ford models will give information about U0421 DTC.
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