U0238low severityNetwork
Lost Communication With Headlamp Washer Control Module
on 2010 Tesla Roadster Single Motor RWD · RWD
What this code means
The vehicle lost communication with the headlamp washer control module. The headlight washers may stop operating.
Symptoms
- Headlight washers inoperative
- Warning light or message
- No washer spray at headlamps
Common causes
- Faulty headlamp washer control module
- Wiring or connector fault
- Blown fuse or lost power/ground
- Damaged bus wiring
Diagnostic steps
- Scan for communication codes
- Check module power and ground
- Inspect connectors near washer pump
- Test bus wiring continuity
🔌 Don't have a code reader?
Any of these will read and clear this code — pick by how deep you want to go.
Budget handheld~$40
ANCEL AD410 →
No-phone-needed handheld — reads, clears, live data, freeze frame.
✓ ANCEL official store
Serious DIY~$100
BlueDriver Pro →
Enhanced codes (ABS, airbag, TPMS) plus repair reports.
SHOP FAVORITEShop-grade tablet~$300
Autel MaxiCOM MK808S →
Bidirectional tests, service resets, all systems.
✓ Autel official store
Pro diagnostics$1,500+
Autel MaxiSys MS906 Pro →
Full-system pro platform — topology mapping, ECU coding, the works.
✓ Autel official store
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Other Network codes on this vehicle
U0001
High Speed CAN Communication Bus
U0002
High Speed CAN Communication Bus Performance
U0003
High Speed CAN Communication Bus (+) Open
U0004
High Speed CAN Communication Bus (+) Low
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
U0009
High Speed CAN Communication Bus Shorted Together
U0010
Medium Speed CAN Communication Bus