U0004 — High Speed CAN Communication Bus (+) Low

Network (CAN bus, communication)

High Speed CAN Communication Bus (+) Low

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Can I drive with U0004?

You can usually drive home and book an inspection within a few days.

Frequently asked questions

What does fault code U0004 mean?

U0004 means High Speed CAN Communication Bus (+) Low.

Can I keep driving with U0004?

You can usually drive home and book an inspection within a few days.

Related fault codes

• U0001 — High Speed CAN Communication Bus
• U0002 — High Speed CAN Communication Bus Performance
• U0003 — High Speed CAN Communication Bus (+) Open
• U0005 — High Speed CAN Communication Bus (+) High
• U0006 — High Speed CAN Communication Bus (-) Open
• U0007 — High Speed CAN Communication Bus (-) Low
• U0008 — High Speed CAN Communication Bus (-) High

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