Code result
U0030
Powertrain Sensor Data Bus
High severity
What it means
A fault has been detected on the dedicated powertrain sensor data bus (a sub-bus used for high-speed sensor data such as crank, knock or wheel-speed). Symptoms range from rough running to limp-home, depending on which sensor stream is missing.
Is it safe to drive?
No — stop driving
This code can put the vehicle into limp or reduced-power mode. Avoid extended driving and have the vehicle diagnosed promptly.
Most likely causes
Sensor data bus wiring damaged
highOne of the most commonly reported causes for this code — check this first.
Sensor module on bus failed
mediumA plausible cause — test and verify before replacing parts.
Gateway module routing CAN messages incorrectly
lowLess common, but worth ruling out after the more likely causes.
Related help
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