Bus communication
Lost communication with a module, or a module reporting implausible data. Rarely the module itself: look for power, ground and connector faults first.
49 documented codes across 145 real diagnostics.
Ranked by how often we actually see them
| Code | What it is | Diagnostics |
|---|---|---|
| U0416 | Invalid data received from vehicle dynamics control module | 13 |
| U0100 | Lost communication with ECM/PCM A | 11 |
| U0401 | Invalid data received from ECM/PCM A | 9 |
| U0121 | Lost communication with ABS control module | 8 |
| U029D | Not individually documented | 5 |
| U0167 | Lost communication with immobiliser control module | 4 |
| U0155 | Lost communication with instrument panel cluster | 4 |
| U2105 | Not individually documented | 4 |
| U0064 | Not individually documented | 4 |
| U201F | Not individually documented | 4 |
| U0252 | Not individually documented | 4 |
| U0422 | Not individually documented | 4 |
| U0484 | Not individually documented | 4 |
| U0019 | Low speed CAN communication bus | 3 |
| U0103 | Lost communication with gear shift module | 3 |
| U0415 | Invalid data received from ABS control module | 3 |
| U0428 | Invalid data received from steering angle sensor module | 3 |
| U0114 | Not individually documented | 3 |
| U0151 | Not individually documented | 3 |
| U016B | Not individually documented | 3 |
| U2139 | Not individually documented | 3 |
| U0102 | Lost communication with transfer case control module | 2 |
| U0132 | Lost communication with ride level control module | 2 |
| U0164 | Lost communication with HVAC control module | 2 |
| U0400 | Invalid data received | 2 |
| U0402 | Invalid data received from transmission control module | 2 |
| U0001 | High speed CAN communication bus | 2 |
| U0101 | Lost communication with transmission control module | 2 |
| U0122 | Lost communication with vehicle dynamics control module | 2 |
| U0168 | Lost communication with vehicle security control module | 2 |
| U010E | Not individually documented | 2 |
| U011B | Not individually documented | 2 |
| U2100 | Not individually documented | 2 |
| U0241 | Not individually documented | 2 |
| U0111 | Not individually documented | 2 |
| U059F | Not individually documented | 2 |
| U0115 | Lost communication with ECM/PCM B | 1 |
| U0141 | Lost communication with body control module A | 1 |
| U0159 | Lost communication with parking assist control module | 1 |
| U0403 | Invalid data received from transfer case control module | 1 |
| U0106 | Lost communication with glow plug control module | 1 |
| U0107 | Lost communication with throttle actuator control module | 1 |
| U0118 | Lost communication with fuel pump control module | 1 |
| U0131 | Lost communication with power steering control module | 1 |
| U0140 | Lost communication with body control module | 1 |
| U0199 | Lost communication with door control module A | 1 |
| U0418 | Invalid data received from brake system control module | 1 |
| U0420 | Invalid data received from power steering control module | 1 |
| U0423 | Invalid data received from instrument panel cluster | 1 |
Manufacturer-specific codes in this group
We have seen these in this area of the vehicle, and they get no page of their own on purpose. A manufacturer-specific code means different things on different marques, so a single description for one would be wrong more often than right. To decode one you need the marque as well as the code, which is what the tool does.
U1123 · U1121 · U1400 · U140A · U1000 · U1101 · U3003 · U1122 · U132E · U1940 · U3006 · U12EF · U140B · U1213 · U3000 · U1108 · U1535 · U1F00 · U1008 · U100A · U1103 · U1520 · U1601 · U1011 · U1127 · U1160 · U118A · U11F9 · U1266 · U133C · U1409 · U1900 · U3501 · U3FFF · U1009 · U1050 · U105E · U1076 · U1104 · U1105
Showing 40 of 66 we have seen in this group, most frequent first.
FAQ
Frequently asked questions
How do I run a diagnosis?
Select the vehicle on Start, click the Diagnostic card and choose New diagnostic. Fill in the description, the error codes and the mileage, then click Analyze.
Learn more: Diagnostic (vehicle-first start), Diagnostic form: description, error codes and mileage
Do I have to type the codes from my scan tool?
No. Click the camera button next to Error codes and take or choose a photo (JPEG or PNG) of the scan tool's screen; WrenchLane reads the codes and their descriptions into the form. You can also speak them with the microphone.
Learn more: OBD reader photo scan (fault codes from a photo), Voice input for the problem description
Are the public fault code pages built from my diagnostics?
They are built from anonymised, aggregated diagnostics run in WrenchLane; no workshop, customer or vehicle can be identified. Each fault code page shows how often the code was seen across those diagnostics and in how many separate workshops.
Learn more: Fault code pages on wrenchlane.com (fault-code cluster)
Work a bus communication fault on a real car
Enter the codes and the symptoms and get ranked probable causes for that specific vehicle, with the checks in the order worth doing them. Free account, no card.
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