Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2012 Subaru Outback Base, Standard TransFACTORY OEM SERVICE PROCEDURE
LAN System DTCS
LAN DIAGNOSTIC TROUBLE CODES (DTC) LIST
| DTC | Contents | Content of diagnosis | Note |
|---|---|---|---|
| None | Communication for Initializing Impossible | Subaru Select Monitor communication is open or shorted. | Refer to , COMMUNICATION FOR INITIALIZING IMPOSSIBLE , Diagnostic Procedure with Diagnostic Trouble Code (DTC). |
| U1201 | CAN-HS counter abnormal | High speed CAN communication error | Refer to , DTC U1201 CAN-HS COUNTER ABNORMAL , Diagnostic Procedure with Diagnostic Trouble Code (DTC). |
| U1202 | CAN-HS Bus OFF | Communication of some module is shut down. | Refer to , DTC U1202 CAN-HS BUS OFF , Diagnostic Procedure with Diagnostic Trouble Code (DTC). |
| U1211 | CAN-HS ECM data abnormal | Received error data from ECM. | Refer to , DTC U1211 CAN-HS ECM DATA ABNORMAL , Diagnostic Procedure with Diagnostic Trouble Code (DTC). |
| U1212 | CAN-HS TCM data abnormal | Received error data from TCM. | Refer to , DTC U1212 CAN-HS TCM DATA ABNORMAL , Diagnostic Procedure with Diagnostic Trouble Code (DTC). |
| U1213 | CAN-HS VDC Data Abnormal | Received error data from VDC module. | Refer to , DTC U1213 CAN-HS VDC DATA ABNORMAL , Diagnostic Procedure with Diagnostic Trouble Code (DTC). |
| U121A | CAN-HS Meter Unit Data Abnormal | Received error data from meter. | Refer to , DTC U121A CAN-HS METER UNIT DATA ABNORMAL , Diagnostic Procedure with Diagnostic Trouble Code (DTC). |
| U121B | CAN-HS A/C Data Abnormal | Received error data from A/C module. | Refer to , DTC U121B CAN-HS A/C DATA ABNORMAL , Diagnostic Procedure with Diagnostic Trouble Code (DTC). |
| U121C | CAN-HS SCU Data Abnormal | Received error data from SCU. | Refer to , DTC U121C CAN-HS SCU DATA ABNORMAL , Diagnostic Procedure with Diagnostic Trouble Code (DTC). |
| U1219 | CAN-HS EPB Data Abnormal | Received error data from EPB module. | Refer to , DTC U1219 CAN-HS EPB DATA ABNORMAL , Diagnostic Procedure with Diagnostic Trouble Code (DTC). |
| U1221 | CAN-HS ECM no-receive data | Not received data from ECM. | Refer to , DTC U1221 CAN-HS ECM NO-RECEIVE DATA , Diagnostic Procedure with Diagnostic Trouble Code (DTC). |
| U1222 | CAN-HS TCM No-Receive Data | Not received data from TCM. | Refer to , DTC U1222 CAN-HS TCM NO-RECEIVE DATA , Diagnostic Procedure with Diagnostic Trouble Code (DTC). |
| U1223 | CAN-HS VDC No-Receive Data | Not received data from VDC module. | Refer to , DTC U1223 CAN-HS VDC NO-RECEIVE DATA , Diagnostic Procedure with Diagnostic Trouble Code (DTC). |
| U122A | CAN-HS Meter No-Receive Data | Not received data from meter. | Refer to , DTC U122A CAN-HS METER NO-RECEIVE DATA , Diagnostic Procedure with Diagnostic Trouble Code (DTC). |
| U122B | CAN-HS A/C No-Receive Data | Not received data from A/C CM. | Refer to , DTC U122B CAN-HS A/C NO-RECEIVE DATA , Diagnostic Procedure with Diagnostic Trouble Code (DTC). |
| U122C | CAN-HS SCU No-Receive Data | Not received data from SCU. | Refer to , DTC U122C CAN-HS SCU NO-RECEIVE DATA , Diagnostic Procedure with Diagnostic Trouble Code (DTC). |
| U1229 | CAN-HS EPB No-Receive Data | Not received data from EPB module. | Refer to , DTC U1229 CAN-HS EPB NO-RECEIVE DATA , Diagnostic Procedure with Diagnostic Trouble Code (DTC). |
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
Comes to youSame-day available12-month warranty
Get a Free QuoteNo obligation. See pricing before you book.