04 Ford Expedition Codes b2900 c1805 and u1262.

ok............when you change plugs the cmptr needs to relearn firing order. it takes 3-5 times/restarts before it relearns. I went through the exact same thing with my expedition. a day or two later she purred like a kitten. secondly if you are having acceleration problems you may be looking at a bad catalytic converter. lastly......check your air filter, take it out and see how it runs without filter. that was also an issue I had when it was rough running. good luck

Did you change any modules on the vehicle ?
B2900 VIN Mismatched ABS Module VERIFY that the module has the correct as-built data.
CHECK for correct powertrain control module (PCM) and ABS module configuration using the diagnostic tool. RECONFIGURE the component as necessary. FOLLOW the diagnostic tool directions for the ABS module configuration or REFER to Section 303-01A or Section 303-01B for the PCM. CLEAR the DTC. REPEAT the C1805 Mismatched PCM and/or ABS/TC Module ABS Module CHECK for correct PCM and ABS module configuration using the diagnostic tool. RECONFIGURE the component as necessary. FOLLOW the diagnostic tool directions for the ABS module configuration or REFER to Section 303-01A or Section 303-01B for the PCM. CLEAR the DTC. REPEAT the self-test. U1073 SCP (J1850) Invalid or Missing Data for Engine Coolant PCM REFER to Powertrain Control/Emissions Diagnosis (PC/ED) manual. U1262 SCP (J1850) Communication Bus Fault Network Fault REFER to Section 418-00 . Can a scan tool communicate with all the modules on the vehicle ?

• The anti-lock brake system (ABS) module or stability assist module (if equipped) does not respond to the diagnostic tool

• Circuit or connection in the standard corporate protocol (SCP) network.
• ABS module.

• Go To Pinpoint Test A .

U1123 Invalid or Missing Data For Odometer Instrument Cluster Go To Pinpoint Test G . U1059 SCP (J1850) Invalid or Missing Data for Transmission/Transaxle/PRNDL PCM REFER to Powertrain Control/Emissions Diagnosis (PC/ED) manual. U1041 SCP (J1850) Invalid Or Missing Data For Vehicle Speed Instrument Cluster REFER to Section 413-01 . U1041 SCP (J1850) Invalid Or Missing Data For Vehicle Speed Tire Pressure Monitoring System Module REFER to Section 204-04 . You need to take it to the dealer , not a transmission shop. Your vehicle could have a ground issue , could have power issue , could have a control module issue . It needs to be hooked up to the factory scan tool ! It is for sure it has a communication problem on the SCP data bus , do you know what serial data communication is ?
The vehicle has 3 module communication networks:

• the standard corporate protocol (SCP) communications network
• the international standards organization (ISO) 9141 communications network
• the universal asynchronous receiver-transmitter (UART) based protocol (UBP) communications network

The diagnostic tool connects to all 3 networks through the data link connector (DLC). This makes diagnosis and testing of these systems easier by allowing one diagnostic tester to be able to diagnose and control any module on the 3 networks from one connector. The DLC can be found under the instrument panel between the steering column and the radio.
The SCP communications network will remain operational even with the severing of one of the bus wires. Communications will also continue if one of the bus wires is shorted to ground or voltage, or if some but not all termination resistors are lost. The SCP communications network allows inter-module communication.
The ISO 9141 communications network does not permit intermodule communication. When the diagnostic tool communicates to modules on the ISO 9141 communication network, the diagnostic tool must request all information, or initiate module commands.
The ISO 9141 communications network will not function if the wire is shorted to ground or battery voltage. Also, if one of the modules on the ISO 9141 communications network loses power or shorts internally, communications to that module will fail.
The UBP communications network will not function if the wire is shorted to ground or voltage. The UBP is different from the ISO communication network in that it allows intermodule communication.

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C1805 - Engine-Codes.com

engine-codes.com/c1805.html
Possible Causes and Repair Information for C1805 code. Learn what does C1805means? C1805 Mismatched PCM and/or ABS-TC Mod.

Need to replace All the spark plugs,All the coils
& All the oxygen sensors,clean the maf sensor

Usually with all the cylinder misfires from bad coils,
your exhaust converters are ruined

Check the oil level, coolant level, transmission level. Check water pump, spark plugs,when did you buy the van check see if the car got accidents car fax.com. Also do you speed a lot excessive speed can age your vehicle very fast especially you travel thousand miles and if use it to go to work. Go back to the dealer so you can get write off on the job than file a suit if proof of neglect some dealers are lazy too check the problem there are good and bad mechanics so check Better Business Bureau and National Cars Association for good dealers and reputable private mechanics you may can sue, but you can a lot of money big dealer mechanic for your own protection.

I tinck yours ignition coils. before you get news echange the coil position of the number 2 and 8 if the codes change to the others cilynders numbers buy news .if nothing change check the conectors and sparck plugs of number 2 and 8.

I would be checking for problem engine/ transmission mounts

check the accelerator cable it must be weak or worn out.due to which car starts sluggish while acceleration. -------- as you have replaced the most possible option/possibilities for car starting sluggish while accelaration its advisable that you need to get the codes checked at the car diagnosis center.so it will locate and confirm the exact faulty part. at www.autozone.com its free to get car diagnosed.they also sell parts if required after checking the codes. This will help. Thanks please keep updated. please dorate the solution positively .thank you for using fixya.

My was doing the same thing, it was an EGR valve and a misfire on the #2 cylinder which required a new spark plug and a coil pack
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4.2 ltr missing. 2000 truck, f150. Changed plugs, wires. Ran great for 2 weeks. Started again. Changed coils. Got worse. Changed fuel filter, did nothing. Added injector cleaner and fuel cleaner, nothing. Checked EGR, o.k. It is getting worse. Had new gas about the time it all started.