What it means
Generic U0162 indicates peers (radio/BCM/IPC/driver-assist modules) stopped receiving required messages from the navigation/display module (AVN/NDM). Often lives on body CAN (MS-CAN or Low-Speed GMLAN) with a gateway to HS-CAN. Subaru documents U0162 = Lost Communication with Audio Visual Navigation Display Module and issued updates to improve CAN communication robustness. OBD-Codes.com+2NHTSA Static+2
Typical symptoms
- Blank/“no connection” display; no nav or camera overlay; infotainment features limited
- U0162 stored by radio/driver-assist (e.g., SRVD) while AVN node is offline on topology. NHTSA Static
Why it sets
- Timeout on AVN messages. OBD-Codes and RepairPal emphasize AVN power/ground loss as the most common cause, followed by body-bus faults. OBD-Codes.com+1
Common root causes
AVN power/ground loss; body-bus wiring faults (console/IP harnesses); gateway issues; AVN module transceiver/software faults; aftermarket audio/telematics integrations. OBD-Codes.com
Professional diagnostics
Global scan/topology (who sets it?); verify AVN feeds/grounds first; body-bus physical checks (MS-CAN ≈60 Ω pair; single-wire GMLAN 0–5 V); isolate center-stack branches; connector/pin-drag/water checks; apply OEM updates where available; replace/initialize last. NHTSA Static+1
Verified fixes
Restore AVN power/grounds; repair body-bus wiring/connectors; apply Subaru SRVD/AVN updates where applicable; remove interfering add-ons; reflash/replace AVN when proven faulty; clear, power-cycle, re-scan. OEMDTC
Sources
- OBD-Codes – U0162 (definition & “power/ground most common” note). OBD-Codes.com
- RepairPal – U0162 (symptoms/causes). RepairPal.com
- Subaru TSB 07-205-22 — SRVD info & U0162; reprogramming to enhance CAN communication between rear radar & head unit. NHTSA Static
- Subaru OEM DTC portal summary (same bulletin; public digest). OEMDTC
- GM/ACDelco – HS-LAN Tips (network spec for HS-side when gateway implicated). NHTSA Static
If you want me to keep going in this same format, next up I’ll cover: U0167 (Immobilizer/Smart-Key), U0183/U0185 (Front/Rear display modules), U0208 (Seat Module “A”), and U0120/U0129 (Ride level/chassis control)—then the “good rounding-out” set (U0103, U0114, U0132, U0156, U0192, U0212).