Bus communication fault codes

44 documented codes across 120 real diagnostics.

Lost communication with a module, or a module reporting implausible data. Rarely the module itself: look for power, ground and connector faults first.

Ranked by how often we actually see them

  • U0416, Invalid data received from vehicle dynamics control module
  • U0401, Invalid data received from ECM/PCM A
  • U0121, Lost communication with ABS control module
  • U0100, Lost communication with ECM/PCM A
  • U029D, not individually documented
  • U0167, Lost communication with immobiliser control module
  • U0155, Lost communication with instrument panel cluster
  • U0064, not individually documented
  • U201F, not individually documented
  • U0252, not individually documented
  • U0422, not individually documented
  • U0484, not individually documented
  • U0019, Low speed CAN communication bus
  • U0103, Lost communication with gear shift module
  • U0415, Invalid data received from ABS control module
  • U0428, Invalid data received from steering angle sensor module
  • U2105, not individually documented
  • U0114, not individually documented
  • U016B, not individually documented
  • U0102, Lost communication with transfer case control module
  • U0132, Lost communication with ride level control module
  • U0164, Lost communication with HVAC control module
  • U0400, Invalid data received
  • U0402, Invalid data received from transmission control module
  • U0122, Lost communication with vehicle dynamics control module
  • U0168, Lost communication with vehicle security control module
  • U2100, not individually documented
  • U0241, not individually documented
  • U059F, not individually documented
  • U0115, Lost communication with ECM/PCM B
  • U0141, Lost communication with body control module A
  • U0159, Lost communication with parking assist control module
  • U0403, Invalid data received from transfer case control module
  • U0001, High speed CAN communication bus
  • U0101, Lost communication with transmission control module
  • U0106, Lost communication with glow plug control module
  • U0107, Lost communication with throttle actuator control module
  • U0118, Lost communication with fuel pump control module
  • U0131, Lost communication with power steering control module
  • U0140, Lost communication with body control module
  • U0199, Lost communication with door control module A
  • U0418, Invalid data received from brake system control module
  • U0420, Invalid data received from power steering control module
  • U0423, Invalid data received from instrument panel cluster

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.

U1121 · U1123 · U1400 · U140A · U1101 · U3003 · U1122 · U132E · U1940 · U3006 · U1213 · U1108 · U1535 · U1008 · U1103 · U1520 · U1011 · U1127 · U1160 · U118A · U11F9 · U1266 · U133C · U1409 · U1900 · U3000 · U3501 · U3FFF · U1000 · U1050 · U105E · U1076 · U1104 · U1105 · U1110 · U1118 · U11A3 · U11B8 · U1208 · U1210

Showing 40 of 52 we have seen in this group, most frequent first.