U0252
Not individually documented
U0252 is a standardised code, but it is not one of the codes with a single agreed description. Rather than guess at a meaning, this page gives what its structure genuinely tells you and what we see when it turns up in real work.
What the code tells you on its own
- System
- Network
- Functional group
- Bus communication
Communication faults — a module that stopped answering on the CAN bus, or sent implausible data. Often a symptom of a power or wiring problem rather than a failed module.
What we see when U0252 turns up
Measured across the diagnostics run through Wrenchlane, not taken from a reference table. Figures as of 2026-10-06.
- Diagnostics
- 4
- Separate workshops
- 1
- Arrived code only
- 0%
- Most common marque
- Volvo
August 2026
Seen at a single shop so far
No symptom description entered at all
Where we have seen it most
These are counts from our own work, not a claim about how common the fault is across all vehicles. They describe what independent workshops brought to us, which is a narrower and more specific thing.
What U0252 usually turns up with
Measured across our own diagnostics. The multiplier is how much more often the two appear together than chance would predict, so a high number means the pair is telling you something a single code is not. Codes rarely arrive alone, and reading the set is usually faster than chasing the first one on the list.
Run U0252 against the car in front of you
Enter the code 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.
Start freeOther bus communication codes
- U0100 Lost communication with ECM/PCM A
- U0416 Invalid data received from vehicle dynamics control module
- U0401 Invalid data received from ECM/PCM A
- U0121 Lost communication with ABS control module
- U0167 Lost communication with immobiliser control module
- U0155 Lost communication with instrument panel cluster
- U0019 Low speed CAN communication bus
- U0103 Lost communication with gear shift module
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)