This is one of those "Good to know" pieces of info. At least it is for me and I thought it was worth sharing.

Ford has many dtc's that can not be pulled with the tunner. Have had mini maxx say no codes and pulled a long list of codes using the ford IDS. Reprogramming also leaves a string of "U" codes that are module to module comunication codes that can not be pulled with the mini maxx. Any time DTC's are cleared a P1000 will be there immediatly even if the H&S product isn't pulling it and remain there untill the PCM has ran long enough to clear it.

U0073 Control Module Communication Bus A Off
U0101 Lost Communication With Transmission Control Module (TCM)
U0121 Lost Communication With The Anti-lock Brake System (ABS) Control Module
U0137 Lost Communication With Trailer Brake Control (TBC) Module
U0151 Lost Communication With Restraints Control Module (RCM)
U0155 Lost Communication With Instrument Panel Cluster (IC) Control Module

These codes in general are ignored for general diagnotics unless it seems relevent to concern present. Multiple U codes generally happen when programing the PCM because it looses communication with the other modules during programing. But other things can cause these codes like low voltage where non essential modules shut down in low voltage conditions. Or high voltage where modules will shut down to protect it in high voltage situations. So a dead battery or a jump start could set U codes but would also be ignored if you are also seeing low or high voltage codes. Now if you are seeing only U codes with no other codes that would logically cause a U code then you start suspecting something else like a module reprogram from the likes of a the programmers that we are running.

Many codes are proprietory to ford software, meaning that only ford software can see these codes. Also the ford software can pull codes from specific modules not just the PCM and TCM like the H&S products. What it comes down to is unless you are going to put a vehicle back to stock and run it a 100+ miles, a dealer can tell if they look hard enough.

Pretty reliable info from a Ford employee.

 

Thanks man for this good to know info

 

This should be added to the tech folder, good info

 

Thanks for sharing.

 

HEY BOYS...... I GOT A SITUATION HERE. 08 F550 6.4. WONT CRANK, CLUSTER IS DEAD. CODES P1260,U0155, U0121, U0073. TOWED TO HOME AND NEED ADVISE. WAS RUNNING FINE THEN JUST WOULDNT CRANK. COULD DASH BE BLOWN AND CAUSING THE NO CRANK/ NO START ????? GRRRRRRRRRR...

 

Good info, Thanks

 

AutoEnginuity can read some of the codes that IDS sees. Like RM2738 says, normal code scanners don't see anything beyond the PCM/TCM. Each of the ECU's throughout the truck has its own codes.

Along similar lines, when I used my AutoEnginuity to log about 15 PID's for about a month continuously, the more I ran it, the more of these U-codes appeared when I pulled them.

I asked AutoEnginuity about it and they replied Ford seems to have low thresholds for what it deems to be an error. Also, when talking to other ECU's with the scanner, some of them are put into diagnostics modes and therefore stop communicating and get logged as errors. I have a feeling the AutoEnginuity is maybe also corrupting something on the CAN bus(es) when initializing itself or reading stuff in diagnostics mode

When I pulled the codes 3 months after I stopped logging, all of these codes were gone, so I'm not sure when they cleared themselves

I logged for a short while again just recently, and I pulled the codes out of curiosity. The latest complaints are some communication fault in the audio unit and a failure in my 4x4 unit.

No CEL's, and my Scangauge says no codes or pending codes either.

Bottom line is, if something is messing with an ECU over the CAN bus, I'm sure something will invariably complain about it.



<table align="center" bgcolor="#c0c0c0" border="1" cellpadding="2" cellspacing="0" width="750"> <tbody> <tr> <td align="center">Diagnostic Trouble Codes</td></tr></tbody></table> <table align="center" bgcolor="#d0d0d0" border="1" cellpadding="2" cellspacing="0" width="750"> <tbody> <tr> <td align="left" width="750">Generic Powertrain </td></tr></tbody></table> <table align="center" border="0" cellpadding="2" cellspacing="0" width="750"> <tbody> <tr> <td align="left" width="750">No diagnostic codes retrieved </td></tr></tbody></table> <table align="center" bgcolor="#d0d0d0" border="1" cellpadding="2" cellspacing="0" width="750"> <tbody> <tr> <td align="left" width="750">Anti-Lock Brake/Traction Control CAN </td></tr></tbody></table> <table align="center" border="0" cellpadding="2" cellspacing="0" width="750"> <tbody> <tr> <td align="left" width="750">B2900 VIN Mismatch </td></tr></tbody></table> <table align="center" border="0" cellpadding="2" cellspacing="0" width="750"> <tbody> <tr> <td align="left" width="750">U2011 Module Transmitted Invalid Data (Non SCP) </td></tr></tbody></table> <table align="center" border="0" cellpadding="2" cellspacing="0" width="750"> <tbody> <tr> <td align="left" width="750">U0115 Lost Communication With ECM / PCM B </td></tr></tbody></table> <table align="center" border="0" cellpadding="2" cellspacing="0" width="750"> <tbody> <tr> <td align="left" width="750">U0155 Lost Communication With Instrument Panel Cluster (IPC) Control Module </td></tr></tbody></table> <table align="center" bgcolor="#d0d0d0" border="1" cellpadding="2" cellspacing="0" width="750"> <tbody> <tr> <td align="left" width="750">Airbag CAN </td></tr></tbody></table> <table align="center" border="0" cellpadding="2" cellspacing="0" width="750"> <tbody> <tr> <td align="left" width="750">U0100 Lost Communication With ECM / PCM A </td></tr></tbody></table> <table align="center" border="0" cellpadding="2" cellspacing="0" width="750"> <tbody> <tr> <td align="left" width="750">U0253 Lost Communication With Accessory Protocol Interface Module </td></tr></tbody></table> <table align="center" bgcolor="#d0d0d0" border="1" cellpadding="2" cellspacing="0" width="750"> <tbody> <tr> <td align="left" width="750">Accessory Protocol Interface Module CAN 14229 </td></tr></tbody></table> <table align="center" border="0" cellpadding="2" cellspacing="0" width="750"> <tbody> <tr> <td align="left" width="750">U0100 Lost Communication With ECM / PCM A </td></tr></tbody></table> <table align="center" border="0" cellpadding="2" cellspacing="0" width="750"> <tbody> <tr> <td align="left" width="750">U0140 Lost Communication With Body Control Module </td></tr></tbody></table> <table align="center" border="0" cellpadding="2" cellspacing="0" width="750"> <tbody> <tr> <td align="left" width="750">U0155 Lost Communication With Instrument Panel Cluster (IPC) Control Module </td></tr></tbody></table> <table align="center" border="0" cellpadding="2" cellspacing="0" width="750"> <tbody> <tr> <td align="left" width="750">U0184 Lost Communication With Radio </td></tr></tbody></table> <table align="center" bgcolor="#d0d0d0" border="1" cellpadding="2" cellspacing="0" width="750"> <tbody> <tr> <td align="left" width="750">Audio Control Module MCAN 14229 </td></tr></tbody></table> <table align="center" border="0" cellpadding="2" cellspacing="0" width="750"> <tbody> <tr> <td align="left" width="750">U0140 Lost Communication With Body Control Module </td></tr></tbody></table> <table align="center" border="0" cellpadding="2" cellspacing="0" width="750"> <tbody> <tr> <td align="left" width="750">U0155 Lost Communication With Instrument Panel Cluster (IPC) Control Module </td></tr></tbody></table> <table align="center" border="0" cellpadding="2" cellspacing="0" width="750"> <tbody> <tr> <td align="left" width="750">U0159 Lost Communication With Parking Assist Control Module A </td></tr></tbody></table> <table align="center" border="0" cellpadding="2" cellspacing="0" width="750"> <tbody> <tr> <td align="left" width="750">U0197 Lost Communication With Telephone Control Module </td></tr></tbody></table> <table align="center" bgcolor="#d0d0d0" border="1" cellpadding="2" cellspacing="0" width="750"> <tbody> <tr> <td align="left" width="750">4x4 Control </td></tr></tbody></table> <table align="center" border="0" cellpadding="2" cellspacing="0" width="750"> <tbody> <tr> <td align="left" width="750">No diagnostic codes retrieved </td></tr></tbody></table> <table align="center" bgcolor="#d0d0d0" border="1" cellpadding="2" cellspacing="0" width="750"> <tbody> <tr> <td align="left" width="750">Driver Seat Module MCAN </td></tr></tbody></table> <table align="center" border="0" cellpadding="2" cellspacing="0" width="750"> <tbody> <tr> <td align="left" width="750">U0155 Lost Communication With Instrument Panel Cluster (IPC) Control Module </td></tr></tbody></table> <table align="center" border="0" cellpadding="2" cellspacing="0" width="750"> <tbody> <tr> <td align="left" width="750">U0140 Lost Communication With Body Control Module </td></tr></tbody></table> <table align="center" bgcolor="#d0d0d0" border="1" cellpadding="2" cellspacing="0" width="750"> <tbody> <tr> <td align="left" width="750">Enhanced Powertrain CAN </td></tr></tbody></table> <table align="center" border="0" cellpadding="2" cellspacing="0" width="750"> <tbody> <tr> <td align="left" width="750">No diagnostic codes retrieved </td></tr></tbody></table> <table align="center" bgcolor="#d0d0d0" border="1" cellpadding="2" cellspacing="0" width="750"> <tbody> <tr> <td align="left" width="750">General Electronics Module MCAN </td></tr></tbody></table> <table align="center" border="0" cellpadding="2" cellspacing="0" width="750"> <tbody> <tr> <td align="left" width="750">No diagnostic codes retrieved </td></tr></tbody></table> <table align="center" bgcolor="#d0d0d0" border="1" cellpadding="2" cellspacing="0" width="750"> <tbody> <tr> <td align="left" width="750">GPS Module MCAN 14229 </td></tr></tbody></table> <table align="center" border="0" cellpadding="2" cellspacing="0" width="750"> <tbody> <tr> <td align="left" width="750">No response from module </td></tr></tbody></table> <table align="center" bgcolor="#d0d0d0" border="1" cellpadding="2" cellspacing="0" width="750"> <tbody> <tr> <td align="left" width="750">HVAC MCAN </td></tr></tbody></table> <table align="center" border="0" cellpadding="2" cellspacing="0" width="750"> <tbody> <tr> <td align="left" width="750">No diagnostic codes retrieved </td></tr></tbody></table> <table align="center" bgcolor="#d0d0d0" border="1" cellpadding="2" cellspacing="0" width="750"> <tbody> <tr> <td align="left" width="750">Instrument Cluster CAN </td></tr></tbody></table> <table align="center" border="0" cellpadding="2" cellspacing="0" width="750"> <tbody> <tr> <td align="left" width="750">U0100 Lost Communication With ECM / PCM A </td></tr></tbody></table> <table align="center" border="0" cellpadding="2" cellspacing="0" width="750"> <tbody> <tr> <td align="left" width="750">U0101 Lost Communication with TCM </td></tr></tbody></table> <table align="center" border="0" cellpadding="2" cellspacing="0" width="750"> <tbody> <tr> <td align="left" width="750">U2511 CAN - Data Mis-Match (Receive data does not match expected) </td></tr></tbody></table> <table align="center" border="0" cellpadding="2" cellspacing="0" width="750"> <tbody> <tr> <td align="left" width="750">U0140 Lost Communication With Body Control Module </td></tr></tbody></table> <table align="center" border="0" cellpadding="2" cellspacing="0" width="750"> <tbody> <tr> <td align="left" width="750">U0164 Lost Communication With HVAC Control Module </td></tr></tbody></table> <table align="center" bgcolor="#d0d0d0" border="1" cellpadding="2" cellspacing="0" width="750"> <tbody> <tr> <td align="left" width="750">Park Aid </td></tr></tbody></table> <table align="center" border="0" cellpadding="2" cellspacing="0" width="750"> <tbody> <tr> <td align="left" width="750">No response from module </td></tr></tbody></table> <table align="center" bgcolor="#d0d0d0" border="1" cellpadding="2" cellspacing="0" width="750"> <tbody> <tr> <td align="left" width="750">Rear Entertainment Module MCAN </td></tr></tbody></table> <table align="center" border="0" cellpadding="2" cellspacing="0" width="750"> <tbody> <tr> <td align="left" width="750">No diagnostic codes retrieved </td></tr></tbody></table> <table align="center" bgcolor="#d0d0d0" border="1" cellpadding="2" cellspacing="0" width="750"> <tbody> <tr> <td align="left" width="750">Satellite Digital Audio Receiver MCAN </td></tr></tbody></table> <table align="center" border="0" cellpadding="2" cellspacing="0" width="750"> <tbody> <tr> <td align="left" width="750">No diagnostic codes retrieved </td></tr></tbody></table> <table align="center" bgcolor="#d0d0d0" border="1" cellpadding="2" cellspacing="0" width="750"> <tbody> <tr> <td align="left" width="750">Trailer Brake Control CAN </td></tr></tbody></table> <table align="center" border="0" cellpadding="2" cellspacing="0" width="750"> <tbody> <tr> <td align="left" width="750">U0115 Lost Communication With ECM / PCM B </td></tr></tbody></table> <table align="center" border="0" cellpadding="2" cellspacing="0" width="750"> <tbody> <tr> <td align="left" width="750">U0155 Lost Communication With Instrument Panel Cluster (IPC) Control Module </td></tr></tbody></table> <table align="center" border="0" cellpadding="2" cellspacing="0" width="750"> <tbody> <tr> <td align="left" width="750">U2202 Invalid Configuration Data Received </td></tr></tbody></table> <table align="center" bgcolor="#d0d0d0" border="1" cellpadding="2" cellspacing="0" width="750"> <tbody> <tr> <td align="left" width="750">Transmission Control CAN </td></tr></tbody></table> <table align="center" border="0" cellpadding="2" cellspacing="0" width="750"> <tbody> <tr> <td align="left" width="750">No diagnostic codes retrieved </td></tr></tbody></table>