Question about 2001 Ford Super Duty F 450

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Duag code u1262, p0500 & p0720

I have been told that the ABS module is no good and that would cause my problem. Have you ever seen this?

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Your codes are as follows:

U1262 communications bus fault
P0500 Vehicle Speed Sensor Malfunction
P0720 Output Speed Sensor Circuit Malfunction

What, if any, symptoms is your vehicle showing?

If your Vehicle Spped Sensor has gone bad, it can cause loss of anti-lock brakes, "anti-lock" or "brake" warning lamps on the dash, the speedometer or odometer may not work properly (or at all), your vehicle's RPM limiter may be decreased or automatic transmission shifting to be erratic.

Posted on Jan 19, 2009


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Posted on Jan 02, 2017


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I have a 1998 dodge caravan 3.3L fault codes p0500 p0700 p0720 p0715, how do I repair and replace sensors to pass smog test

Follow the links for each fault code.
P0700 Transmission Control System Malfunction
P0720 Output Speed Sensor Circuit Malfunction
P0715 sets when there is an error in the transmission's input speed sensor signal. On the front of the trans there is an input and output speed sensor that the trans controller looks at for shifting control.

While the code could have set because of a wiring or connection problem, it's almost surely the sensor. Input speed sensor failures are not uncommon.

The input speed sensor is mounted right on the front of the trans directly under where the cooler lines attach. It threads directly in and has a 1" hex for a socket for removal. If the wiring and connection look visibly ok then I would recommend replacing the sensor

Jul 06, 2016 | Dodge Cars & Trucks

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My 2007 Crown Victoria Police has the brake and abs light on, traction control is off. Brake pads and rotors are less than 5000 miles front, new rear. Get diagnostic code U1900 and U1262 front car.

You probably have a wheel speed sensor issue. With the proper scan tool that can access the ABS module it will tell you the exact issue.

Jan 12, 2016 | Cars & Trucks

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BMW X3 speedometer not working. code p0500 , p0503

code p 0500 and 503 both refer to the vehicle speed sensor(VSS)---circuit malfunction or intermittent/ errattic high input====causes wiring-=--VSS---ECM--wiring poor connection--other connected system---instrument panel---VSS---communication control module
to have the abs light on I would be checking the communication control module or the ECM

Dec 14, 2015 | BMW Cars & Trucks

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I have multiple codes instrument cluster codes: u1073, u1262, u1059, u1123, u1041; ABS/TCS codes: u1073, u1262, C1805, B2900;

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.

Sep 13, 2015 | 2004 Lincoln Aviator

1 Answer

I have a 2000 dodge durango with auto trans and 5.9 l engine. A trouble code of P0720 speed sensor malfunction came up but I do not experence any of the problems described in the posts. My speedomoter...

code p 0720 refers to output shaft (OSS) sensor--circuit malfunction=== causes--wiring-- OSS sensor--ECM/TCM
check wiring and connections to the transmission for corrosion /water etc
have the OSS sensor tested by an accredited auto transmission shop--replace if faulty
if ok have the TCM ( transmission control module )tested

Jul 08, 2017 | 2000 Dodge Durango

1 Answer

Abs and brake light on i scan it and came out with 11 codes c1185 c1198 c1194 c1254 c1246 c1250 c1242 c1214 c1210 u1260 u1262 where shou;d i begin

Start by clearing all codes and driving the van until abs light returns then scan and start with the first code that you get on scan tool. i've seen this many times where a bad speed sensor that cust drive with abs light on for a few days or week the computer begins to store all sort of codes,also be sure to check the preasure sensor on the master.

Aug 16, 2010 | 2001 Ford Windstar

1 Answer

My speedometer will not work check engine light goes on and off and the overdrive indicator light flashes. All this happens intermittently with hotter weather it seemingly happens more frequently. Scanned...

code p 0500 is for the vehicle speed sensor (VSS) which works the speedo as well as the ratio changes
code p0720 refers to the output shaft sensor --ECM or transmission control module (TCM)
the vss reports to the tcm which reads the road speed and gear ratio and shifts the appropriate solenoid

May 12, 2017 | Cars & Trucks

1 Answer


bottom line is the U1262 is a communication failure between your scanner and a module

assuming you actually pulled the code from the PCM then you have lost communication with a different module like the ABS, DDM, LCM, RASM, HEC, PAM and any other module I can't think of right now

You need a detailed pinpoint test from a Ford service manual or aftermarket source like Alldata, Shop key or Mitchell on Demand

You could be dealing with over a 100 different test PER module

Obviously something we can't do on-line too easily

If you could at least identify which module you have lost communications with your dealer may, for a fee, copy the correct pinpoint test

May 20, 2010 | 2003 Lincoln Town Car

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