Moderator, If this is wrong area please move it for me. I have a 2006 F250 5.4 gas, Automatic, 4x4, XL, Reg Cab. This is a FED-EX Delivery Truck. That has intermittent C1446. Light will go on and off during his normal daily route say twice a week. I have road tested this truck numerous times and cannot duplicate the problem. Have replaced brake light switch, Inspected connectors everywhere in circuit including at ABS Module. Double checked E Brake Light Switch, Traced harness for chaffing even switched another cluster from an identical truck. Code still comes back. Driver says brake lights work when light is on. But this is not nessesarily good information. These trucks get run HARD on rough mountian roads. Rain or moisture has no effect. Does it rain or shine. Has anyone had a problem like this? Can you give me any ideas or possibly a flow chart to follow? I have a set factory shop manuals here. Any input will be greatly appriciated. This one has me stumped and frustrated!
Aside from doing a good visual inspection of the wiring at the master cylinder, the easiest thing to do is to clear the code and jump out the switch. If you can't drive it long enough to get it to act up then let the customer know the switch is jumped out and let them drive it to see if the code returns. If it doesn't, then I would put my money on the master. If the code returns then you have some wiring issues to trace down, but I doubt that will be the case.
I installed jumper and told driver to watch for light. It has run 4 days now with no light or code. Looks like that was it. I had inspected that circuit but was unsure how to jump the switch. Seen lots of bad ones on cars with 2 wire switch. First Super Duty with this issue. My thanks to Mr. Clayton.
Customer stated thate vehicle would not crank. Verified no crank symptom and noticed security light flashing rapidly. Found codes in PCM as follows. B1681 Passive Anti Theft System (PATS) Transceiver Mod Signal Not Received B2103 Passive Anti Theft System (PATS) Transceiver Circuit Fault. Cleared codes and B1681 returned. Neither of the two keys in vehicle worked.
Scoped the two data communication wires between the PATS transceiver module and the PCM. Found that the PCM was properly pinging the PATS module but the PATS module was not returning any information back to PCM.
The yellow scope channel is connected to the Gray/Orange wire which is the circuit that the PCM outputs 12 volts to the PATS module with. The PATS module is then supposed to toggle this circuit to ground to send the key code information back to the PCM. The green scope channel is connected to the White/Light Green wire which is a 12 volt output from the PATS transceiver to the PCM. The PCM then toggles this circuit to ground to request key code information from the PATS transceiver module. The first scope capture shows two ignition cycles from OFF to ON. This two way communication between the PATS transceiver and the PCM is designed to happen immediately after key on to allow the vehicle to crank and start. As you can see in this scope capture. The Green trace shows that the PCM is toggling a request for the key code information to the PATS transceiver. However the yellow trace just remains stuck at 12 volts. The PATS transceiver is not toggling this circuit to ground to send the key information back to the PCM. So we condemned the PATS transceiver and got authorization from the customer to replace it.
We installed the new PATS transceiver module and cleared the stored codes and the vehicle cranked and started on both keys. The vehicle would not crank until I cleared the stored codes. You can see on the scope capture above (showing one ignition cycle from OFF to ON) that we have the PCM request on the green trace and then the PATS transceiver response on the yellow trace. On this vehicle the PCM stores the PATS key codes and the PATS transceiver is simply the sensor to relay the key code to the PCM. So this means that we did not have to relearn the PATS key codes after replacing the PATS transceiver. Also the PATS transceiver is not a programmable module on this vehicle so that did not require any programming. The PCM still had those key codes stored and it was as simple as replacing the PATS transceiver, clearing the codes, and testing for both keys to start the car.
Hi John,Thanks for the tip. If my memory serves me right, I believe I had checked for an update with IDS and it was current. It has been a few days ago, so I hope I'm not getting mixed up with another Ford.
I ran into this today, however strangely, the tx/rx color scheme on my unit is reversed, 2006 Transit Connect. I checked the wiring diagrams of both and they are indeed backwards, and the transceivers are identical on the surface at least.
I had a check engine on my 14 S Hybrid that came back with P26CA & U019F as the 2 top results when scanned. After some research all signs point to the electric coolant pump (DS7Z8C419D, PW611, & PW544) and its harness connector. Of the limited amount of info I've found on google and YouTube, i cannot find anything that shows where this is located. Does anyone have experience with this?
I am also having this issue. 2105 fusion hybrid. Multiple codes showing loss of communication with the engine coolant control module. Everything I've found points to corrosion on connector C1812, which is on the water pump.
The water pump is mounted to the fan shroud. So the very front of the car, behind the radiator. It's at the bottom, on the driver's side. Connector C1812 sticks out the bottom of it. Just had to remove the front half of the felt underbody cover, and it's right there, just above the metal bar that the felt mounts to.
The electronic water pump on my 2014 Ford Fusion Hybrid was found near the passenger side right behind the radiator shroud and above a black bar. It's a cylindrical shape most notably found with a blue plug on it's side. Going based off what my ford dealership had said, should you clean the plug, dry it, and apply di-electric grease, should be good enough to reestablish a proper connection and clear those codes. However should those codes come back after clearing with an Obdii, the codes may arise from a faulty water pump. The part # for these pumps may vary. As i'd found PW-544 and PW-611 to look very much the same, with the same prongs for connection. Though from what carservicepro (youtube:
The P1450 code is a diagnostic trouble code (DTC), indicating an issue with the evaporative emissions system. This system includes the fuel tank, fuel filler cap, fuel tank vacuum, fuel tank pressure sensor, evaporative canister, and other components.
A Faulty or Malfunctioning Fuel Vapor Storage CanisterThis canister is responsible for storing and releasing fuel vapor to be burned off. If the canister malfunctions, it cannot keep or release fuel vapors properly, resulting in the P1450 code.
A Damaged or Blocked Vacuum HoseThe evaporative emissions system relies on the vacuum hose to transport fuel vapors from the canister to other system parts. If there is a leak or blockage in the hose, it can cause the P1450 code to be displayed on your dashboard
Problem with an Evaporative Emission Control SystemIf the evaporative emission control system is not functioning correctly, it can result in the P1450 code. This system controls the fuel vapor pressure and ensures it is appropriately burned off.
Faulty or Corroded Electrical Connections to the EVAP System Components If the electrical connections to any of the components in the evaporative emission control system are faulty or corroded, it can cause the P1450 code to be displayed.
The most common causes of the P1450 code are a faulty or malfunctioning fuel vapor storage canister, a damaged or blocked vacuum hose, a problem with the evaporative emission control system, and a damaged or leaking fuel filler cap.
The cost of repairing the P1450 code will depend on the cause of the issue. It should not be too expensive if something simple, such as a damaged vacuum hose or fuel filler cap. However, the repair cost could be higher if there are more severe issues, like a faulty evaporative emission control system.
The best way to fix this issue is by replacing the fuel vapor storage canister, repairing or replacing any damaged vacuum hoses, checking and repairing any electrical connections, and replacing the fuel filler cap. If you need assistance with diagnosis or repairs, you can always take your vehicle to Goodhood for a professional diagnostic service.
The fuel tank sensor is a component in the evaporative emissions system that monitors and regulates the fuel vapor pressure. This system must function correctly, as it helps ensure fuel vapors are burned off efficiently. If there is an issue with the fuel tank sensor, it can cause the P1450 code to be displayed.
The powertrain control module (PCM) monitors and diagnoses trouble codes such as the P1450 code. It does this using a special algorithm that checks for fuel vapor storage system issues, including a faulty or malfunctioning canister, damaged or blocked vacuum hoses, and faulty electrical connections. The PCM will display the P1450 code on your dashboard if any issues are detected.
The fuel filler cap is an essential component of the evaporative emissions system. If the cap is not sealing correctly, it can cause the P1450 code to be displayed. Replacing the fuel filler cap with a new one should solve the issue.
If your check engine light is on, but no codes are being displayed, it could indicate a more serious issue. In these cases, it is best to take your vehicle to a professional mechanic for a detailed inspection and diagnosis of the problem. They will be able to identify any underlying issues that may be causing the issue and help you get your vehicle back on the road.
Resetting the powertrain control module can sometimes help to clear a P1450 code. However, it is essential to remember that resetting the PCM will only remove the code temporarily and does not fix the issue. To permanently fix the problem, you must identify and repair any underlying issues causing the code in your vehicle.
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