OBD-II code · Network
U0448 Invalid Data Received from Gateway B
A second gateway component (or sub-gateway) is forwarding implausible data. Cross-segment functions misbehave until the affected gateway is reset or reflashed.
Is it safe to drive with U0448?
Usually safe for short trips, but don’t ignore it: the underlying fault can get more expensive over time.
Common causes
- PossibleGateway internally failing
- Less likelyGateway module routing CAN messages incorrectly
- Less likelyCAN terminating resistor (120 Ω) drifted out of spec
Symptoms
- Multiple warning lights may illuminate
- Affected modules may go into limp mode or shut down
- Specific functions inoperative depending on module
- Diagnostic tools may show communication faults
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.5–6 h
- Emissions test
- Usually unaffected
- Parts involved
- Vehicle Gateway
Related codes
- U0447Invalid Data Received from Gateway A
- U0445Invalid Data Received From Body Control Module D
- U0446Invalid Data Received From Body Control Module E
- U0449Invalid Data Received From Serial Data Gateway Module C
- U044AInvalid Data Received From Serial Data Gateway Module D
- U044BInvalid Data Received From Battery Energy Control Module C
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.