U1195

SCP (J1850) Invalid or Missing Data for Mirrors

Network / Communication Network/Communication Body Control Bus Data 🟡 Moderate — Fix within a week ⚠️ Drive with Care
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What This Actually Means

In plain language — no jargon

Your vehicle's communication network isn't receiving proper data about the mirror positions from the body control module. It's like a walkie-talkie where one person stops sending their status updates.

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Symptoms You May Notice

3 known symptoms for this code
Power mirror controls unresponsive or intermittent
Mirror adjustment features not functioning properly
Warning light or message on dashboard related to mirrors
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How Your ECU Detects This

Technical sensor logic and voltage thresholds

The ECU monitors SCP (J1850) bus messages for mirror position data and control signals. When valid data packets fail to arrive within expected intervals or contain corrupted information, the fault is triggered. The system expects continuous acknowledgment of mirror module status.

Voltage & Parameter Thresholds

ParameterNormal RangeFault Condition
SCP Bus Message Frequency Valid data every 100-500ms Missing or invalid data for >2 seconds
Data Integrity Check Valid CRC/checksum Corrupted or missing checksum
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Diagnostic & DIY Fix Guide

Check these in order — from cheapest to most complex
1
Battery terminals and connections
Clean corrosion from battery terminals and ground connections to restore proper bus voltage and communication.
2
SCP bus wiring connectors
Inspect and reseat all body control module connectors under the dashboard for loose or corroded pins.
3
Mirror control module
Replace the mirror control module if communication persists after checking wiring and connectors.
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When to See a Professional Mechanic

Not all fault codes are safe to DIY

Code U1195 is a moderate fault. You can generally drive to a workshop, but avoid long trips or high-load driving (motorway, uphill towing) until it is diagnosed. If the code keeps returning after clearing, or if you notice the symptoms listed above worsening, do not delay professional diagnosis. Many moderate codes have multiple possible root causes — a mechanic with live OBD data can identify the exact fault more efficiently than part-by-part trial and error.

Safety note: OBD-II codes identify the system or circuit where a fault was detected — they do not always identify the exact failed component. A professional mechanic using live sensor data will diagnose the root cause more accurately than replacing parts based on the code alone.
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How to Clear Code U1195

What happens after you fix the fault

Once the fault is repaired, U1195 can be cleared using any OBD-II scanner. Connect the scanner, navigate to "Clear Codes" or "Erase DTCs," and confirm. The check engine light turns off immediately.

The code will return if the root cause was not actually fixed. The ECM re-detects the fault within 1–3 drive cycles and sets the code again.

✅ Safe to Clear When
  • Fault has been diagnosed and repaired
  • You want to confirm the repair worked
  • Code appeared after a sensor was cleaned
⚠️ Do Not Clear When
  • Preparing for an emissions/PUC test
  • Root cause is still undiagnosed
  • Check engine light is flashing
Emissions test note: Clearing codes resets OBD readiness monitors. Most vehicles need 50–100 km of mixed driving before monitors complete. Do not clear codes immediately before an emissions or PUC inspection.