P121B
P121B Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.P121B Diagnosis
The PTO 1 output circuit is commanded OFF, but air pressure is detected at the pressure feedback switch. Troubleshoot for PTO 2 air solenoid fault, and for air pressure switch short circuit fault.The BHM is detecting more than one smart switch with the same ID number present on the vehicle. The outputs controlled by the switch and the indicator in the switch are commanded OFF.
The disconnected pipe malfunction is detected when the ventilator tube from the valve cover to the separator device is disconnected resulting in a pressure below the lower limit.Both of these malfunctions will result in a DTC being set.
Ford P121B Fault Code Meaning :
Ford P121B Symptoms :
Ford P121B Reasons :
How To Fix Ford P121B Trouble Code ?
Which Ford cars have the code P121B?
- P121B Ford Aerostar
- P121B Ford Bronco
- P121B Ford C-Max
- P121B Ford C-Max Energi
- P121B Ford C-Max Hybrid
- P121B Ford Contour
- P121B Ford Crown Victoria
- P121B Ford EcoSport
- P121B Ford Econoline
- P121B Ford Edge
- P121B Ford Escape
- P121B Ford Escape Hybrid
- P121B Ford Escort
- P121B Ford Everest
- P121B Ford Excursion
- P121B Ford Expedition
- P121B Ford Explorer
- P121B Ford Explorer Sport Trac
- P121B Ford F-150
- P121B Ford F-250
- P121B Ford F-350
- P121B Ford Fiesta
- P121B Ford Flex
- P121B Ford Focus
- P121B Ford Focus Electric
- P121B Ford Freestar
- P121B Ford Freestyle
- P121B Ford Fusion
- P121B Ford Fusion Energi
- P121B Ford Fusion Hybrid
- P121B Ford Fusion Plug-In Hybrid
- P121B Ford GT
- P121B Ford Mustang
- P121B Ford Mustang Mach-E
- P121B Ford Mystique
- P121B Ford Probe
- P121B Ford Ranger
- P121B Ford Taurus
- P121B Ford Taurus X
- P121B Ford Tempo
- P121B Ford Thunderbird
- P121B Ford Transit
- P121B Ford Transit Connect
- P121B Ford Windstar
A code is a fault code and it indicates that something has gone wrong with your car's engine.
It can be caused by many different problems, including a faulty battery, a bad fuel pump, or even a cracked exhaust manifold.
You will need to diagnose the problem before you can fix it. The best way to do this is with an OBD scanner tool.
A scan tool will tell you what needs fixing and how much it will cost in order to fix that particular issue.