U026B

Code

Generic U — Network/User

Lost Communication With Image Processing Sensor G

Brand: Generic

Type: U — Network/User

Views: UK: 24 EN: 37 RU: 29

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Faulty Image Processing Sensor G (internal failure)
Damaged or corroded wiring or connector between sensor and network
Lost power or ground to the sensor (blown fuse, open circuit)
CAN/LIN network fault (short, open, missing termination)
Faulty gateway or control module that routes messages
Software/firmware mismatch or module needing reflash/reprogramming

Symptoms

ADAS warnings or lamp illuminated (camera/sensor fault)
Loss or degradation of camera-based features (lane keep, traffic sign recognition, etc.)
Diagnostic trouble codes related to network communication present
Possible intermittent operation of affected features
Vehicle may enter reduced functionality or limp mode for safety-critical systems

What to check

Read and record all U0xxx and related codes with a capable scan tool (OEM-level recommended)
Check freeze frame and occurrence count for context
Inspect physical condition of the image sensor connector for corrosion, bent pins, moisture
Inspect sensor harness for chafing, breaks, or recent repairs/aftermarket devices
Verify fuses and fused power feeds for the sensor
Check battery voltage and grounds while cranking and during operation

Signal parameters

CAN High / CAN Low differential voltage (~2.5V idle; H ~2.5–3.5V, L ~1.5–2.5V)
Bus message frequency for Image Processing Sensor G (messages per second; compare to spec)
Bus error counters (TX/RX errors, bus-off status)
Supply voltage to sensor (key on ~11–14V)
Ground continuity to chassis ground
Wake/sleep control line levels if applicable

Diagnostic algorithm

Connect OEM-capable scan tool and read all network and module DTCs; note time stamps and freeze frame data
Verify that the fault is current; if stored only, attempt to recreate and verify persistence
Visually inspect sensor, connector, and harness for damage, corrosion, water intrusion or pin damage
Verify power and ground at the sensor connector: with ignition ON, measure supply voltage and ground continuity; repair any open/low circuits
Check fuses and relay(s) feeding the sensor circuit; replace if blown and investigate cause
With scope or multimeter, verify CAN bus physical layer near the sensor: check H/L idle voltages and differential signal when bus active
Use scan tool to monitor CAN messages from Image Processing Sensor G; if no messages present while other modules are communicating, suspect the sensor or its immediate wiring/power
If intermittent, gently wiggle harness and connectors while watching bus activity and DTCs to reproduce fault
If wiring and power/ground are good, attempt to communicate with the sensor directly with OEM tool (reflash or wake commands) per service procedures
If sensor is non-responsive and wiring checks good, replace sensor only after confirming software/part number match and perform any required calibration or module programming
After repair, clear codes and perform functional test and road test; verify calibrations for ADAS cameras if replaced

Likely causes

Corroded/loose connector at the image sensor
Open or shorted CAN bus wiring near the sensor
Blown fuse or lost 12V/ignition feed to the sensor
Failed image processing sensor/module
Gateway or BCM not forwarding messages due to internal fault or software

Fault status

⚠️ Status

The system no longer receives data from Image Processing Sensor G. Camera-based driver assistance features may be unavailable; have the communications and sensor checked.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0-3.0 hours