Network, generic

U0069 Vehicle Communication Bus E (-) Open

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

U0069 concerns a severed (-) line on Vehicle Communication Bus E, CAN-Low where Bus E is a CAN such as the infotainment CAN Volkswagen Group gateways supervise. Beyond splitting the network, the break matters for signal quality: Texas Instruments points out that stubs on a high-speed CAN are unterminated and should stay short, around 0.3 m, because reflections in them must die out ahead of the sampling point. A break that isolates a terminating node turns the remaining wire into exactly such an open end. Transceivers do not detect line interruptions themselves (NXP), so a module infers the fault from missing acknowledgements or time-outs. No manufacturer documents U0069 publicly. Check CAN-Low continuity and connector latching, especially behind the dashboard.

Likely causes

(-) wire of Bus E broken in the harness
Connector not fully latched, contacts lifting
Terminal backed out of its housing

Symptoms

  • Modules beyond the break unreachable
  • Sporadic message errors among the remaining modules

Repair estimate

DifficultyHardWorkshop job
Parts and labour€60–700
Time0.5–5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

bus e wiringmodule connector

Related codes

U0033U0060U0064U0066U0070

References: ti.com, nxp.com, static.nhtsa.gov.