U0391 DTC For Ford Expedition
Ford Expedition Engine Specifications:
| Engine Type : | Multi-Cylinder Engine |
| Cylinder Type : | Opposite Piston Engine |
| Engine Air Intake Process : | Turbocharged Engine |
Your Ford Expedition engine control system detects a problem, the computer stores the diagnostic trouble
code U0391 in its memory.
To figure out what is wrong with your vehicle you must first extract the U0391 DTC For Ford Expedition.
On 1999 and later U0391 Ford Expedition engines, the instrument cluster has a built-in self-diagnostic mode that can be accessed by pressing and holding the instrument cluster SELECT/RESET button. Insert the ignition key and turn to the RUN position (but don't crank or start engine). Continue to press and hold the SELECT/RESET button (for 5 seconds) until the word TEST is displayed by the odometer. Release the SELECT/RESET button within three seconds after the word TEST is displayed to begin the self-diagnostic mode.
U0391 Ford Expedition DTC Meaning
| U |
Network Code - Problem is climate control system, lighting, airbags, etc. |
| 0 |
SAE - Generic |
| 3 |
IC Module 4X Ref Circuit Intermittent, No Pulses |
| 9 |
TP Sensor Learn Not Complete |
| 1 |
PCM Stack Overrun |
If your U0391 Ford Expedition check engine light is illuminated, it's best to take it in for diagnostic testing, which can feel like a hassle. Because while the lights vary in appearance from vehicle to vehicle, all have the same basic meaning: There's a problem with the car's emissions system. The on-board diagnostics system U0391 and engine control unit are in charge of monitoring a bunch of different U0391 DTC For Ford Expedition, and if they get a reading that's a little out of whack, up pops the check engine light.
You can also check other Ford car models :
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The listed Ford models will give information about U0391 DTC.
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