2011 Ford Taurus SHOFACTORY OEM SERVICE PROCEDURE

Smart Junction Box (SJB)

SMART JUNCTION BOX (SJB) DIAGNOSTIC TROUBLE CODE (DTC) LIST

DTC Description Action
B106A TPMS Sensor Pressure Range Bit Incorrect State REFER to WHEELS & TIRES Article.
B106B Tire Pressure Sensor Low Battery REFER to WHEELS & TIRES Article.
B106D Tire Pressure Monitor System (TPMS) Initiators Not Configured REFER to WHEELS & TIRES Article.
B106E Solid State Driver Disabled Due to Short Circuit GO to PINPOINT TEST A .
B106F Module Disabled Due to External Fault GO to PINPOINT TEST A .
B1138 Memory Full REFER to ANTI-THEFT SYSTEM - PASSIVE ANTI-THEFT SYSTEM (PATS) Article.
B1139 Invalid Transmitter Identification Code REFER to HANDLES, LOCKS, LATCHES AND ENTRY SYSTEMS Article.
B1302 Accessory Delay Relay Coil Circuit Failure REFER to WINDOWS AND GLASS - GLASS, FRAMES AND MECHANISMS Article.
B1304 Accessory Delay Relay Coil Circuit Short to Battery REFER to WINDOWS AND GLASS - GLASS, FRAMES AND MECHANISMS Article.
B1317 Battery Voltage High GO to PINPOINT TEST B .
B1318 Battery Voltage Low GO to PINPOINT TEST C .
B1320 Driver Door Ajar Circuit Open REFER to INTERIOR LIGHTING SYSTEM Article.
B1328 Passenger Door Ajar Circuit Open REFER to INTERIOR LIGHTING SYSTEM Article.
B1331 Decklid Ajar Rear Door Circuit Failure REFER to INTERIOR LIGHTING SYSTEM Article.
B1336 Door Ajar RR Circuit Open REFER to INTERIOR LIGHTING SYSTEM Article.
B1342 ECU is Faulted DIAGNOSE all other DTCs first. If no other DTCs are present, CLEAR the DTCs. REPEAT the self-test. If DTC B1342 is retrieved again, INSTALL a new SJB. REFER to SMART JUNCTION BOX (SJB) . TEST the system for normal operation.
B1352 Ignition Key-In Circuit Failure REFER to INFORMATION CENTER - INSTRUMENTATION, MESSAGE CENTER, AND WARNING CHIMES Article.
B1472 Lamp Headlamp Input Circuit Short to Ground REFER to EXTERIOR LIGHTING SYSTEM Article.
B1485 Brake Pedal Input Short to Battery REFER to EXTERIOR LIGHTING SYSTEM Article.
B1510 Flash to Pass Switch Circuit Short to Ground REFER to EXTERIOR LIGHTING SYSTEM Article.
B1520 Hood Switch Circuit Open REFER to ANTI-THEFT SYSTEM - PERIMETER Article.
B1572 Door Ajar LR Circuit Open REFER to INTERIOR LIGHTING SYSTEM Article.
B1578 Lamp Park Input Circuit Short to Ground REFER to EXTERIOR LIGHTING SYSTEM Article.
B1624 Lamp Keypad Output Open Circuit REFER to HANDLES, LOCKS, LATCHES AND ENTRY SYSTEMS Article.
B1626 Lamp Keypad Output Short Circuit to Ground REFER to HANDLES, LOCKS, LATCHES AND ENTRY SYSTEMS Article.
B1696 Autolamp On Circuit Short to Ground REFER to EXTERIOR LIGHTING SYSTEM Article.
B1791 Autolamp Sensor Input Circuit Open REFER to EXTERIOR LIGHTING SYSTEM Article.
B1793 Autolamp Sensor Input Circuit Short to Ground REFER to EXTERIOR LIGHTING SYSTEM Article.
B2008 Wipers On Signal Circuit Short to Ground REFER to EXTERIOR LIGHTING SYSTEM Article.
B2031 Left Corner Lamp Output Circuit Failure REFER to EXTERIOR LIGHTING SYSTEM Article.
B2032 Right Corner Lamp Output Circuit Failure REFER to EXTERIOR LIGHTING SYSTEM Article.
B2044 Left Rear Stop Lamp Circuit Short to Ground REFER to EXTERIOR LIGHTING SYSTEM Article.
B2045 Left Rear Stop Lamp Circuit Open REFER to EXTERIOR LIGHTING SYSTEM Article.
B2046 Right Rear Stop Lamp Circuit Short to Ground REFER to EXTERIOR LIGHTING SYSTEM Article.
B2047 Right Rear Stop Lamp Circuit Open REFER to EXTERIOR LIGHTING SYSTEM Article.
B2048 Left Rear Turn Lamp Circuit Short to Ground REFER to EXTERIOR LIGHTING SYSTEM Article.
B2049 Left Rear Turn Lamp Circuit Open REFER to EXTERIOR LIGHTING SYSTEM Article.
B2050 Right Rear Turn Lamp Circuit Short to Ground REFER to EXTERIOR LIGHTING SYSTEM Article.
B2051 Right Rear Turn Lamp Circuit Open REFER to EXTERIOR LIGHTING SYSTEM Article.
B2071 Hazard Switch Signal Short to Ground REFER to EXTERIOR LIGHTING SYSTEM Article.
B2100 Door Driver Key Cylinder Switch Failure REFER to ANTI-THEFT SYSTEM - PERIMETER Article.
B213A Digital Dimmer Switch Input Circuit Failure REFER to INSTRUMENT CLUSTER ILLUMINATION AND PANEL ILLUMINATION Article.
B2254 Front Fog Lamp Switch Failure REFER to EXTERIOR LIGHTING SYSTEM Article.
B2276 Less Than 2 Transmitters Programmed REFER to HANDLES, LOCKS, LATCHES AND ENTRY SYSTEMS Article.
B2281 Right Turn Switch Short to Ground REFER to EXTERIOR LIGHTING SYSTEM Article.
B2282 Left Turn Switch Short to Ground REFER to EXTERIOR LIGHTING SYSTEM Article.
B2425 Remote Keyless Entry Out of Synchronization REFER to HANDLES, LOCKS, LATCHES AND ENTRY SYSTEMS Article.
B2477 Module Configuration Failure CARRY OUT Programmable Module Installation (PMI) on the SJB. REFER to MODULE CONFIGURATION SYSTEM Article.
B2479 Park Brake Switch Circuit Short to Ground REFER to INFORMATION CENTER - INSTRUMENTATION, MESSAGE CENTER, AND WARNING CHIMES Article.
B2498 Headlamp Switch Multiple Signals Input Active REFER to EXTERIOR LIGHTING SYSTEM Article.
B2572 Brake Shift Interlock Output Circuit Failure REFER to AUTOMATIC TRANSMISSION - AUTOMATIC TRANSAXLE/TRANSMISSION - EXTERNAL CONTROLS Article.
B2667 Liftglass Release Switch Circuit Failure REFER to HANDLES, LOCKS, LATCHES AND ENTRY SYSTEMS Article.
B2844 Ignition Fault REFER to STEERING COLUMN SWITCHES Article.
B2868 Left Front Tire Pressure Sensor Fault REFER to WHEELS & TIRES Article.
B2869 Right Front Tire Pressure Sensor Fault REFER to WHEELS & TIRES Article.
B2870 Right Rear Tire Pressure Sensor Fault REFER to WHEELS & TIRES Article.
B2871 Left Rear Tire Pressure Sensor Fault REFER to WHEELS & TIRES Article.
B2872 Tire Pressure Sensor Fault REFER to WHEELS & TIRES Article.
B287A Tire Pressure System Fault REFER to WHEELS & TIRES Article.
B2A20 Ignition Stuck in START REFER to STEERING COLUMN SWITCHES Article.
B2A21 One or More Configuration Files Missing or Corrupt CARRY OUT Programmable Module Installation (PMI) on the SJB. REFER to MODULE CONFIGURATION SYSTEM Article. CLEAR the DTCs. REPEAT the self-test. If DTC B2A21 is retrieved again, INSTALL a new SJB. REFER to SMART JUNCTION BOX (SJB) . TEST the system for normal operation.
B2A22 Headlamp OFF Circuit Open REFER to EXTERIOR LIGHTING SYSTEM Article.
B2A23 High Beam Input Circuit Short To Ground REFER to EXTERIOR LIGHTING SYSTEM Article.
B2A24 Turn Signal Input Circuit Failure REFER to EXTERIOR LIGHTING SYSTEM Article.
B2A25 Trim Panel Lock Switch Circuit Failure REFER to HANDLES, LOCKS, LATCHES AND ENTRY SYSTEMS Article.
B2A26 Keypad Switch Circuit Failure REFER to HANDLES, LOCKS, LATCHES AND ENTRY SYSTEMS Article.
B2A27 Right Front Turn Lamp Circuit Open REFER to EXTERIOR LIGHTING SYSTEM Article.
B2A28 Right Front Turn Lamp Circuit Short to Ground REFER to EXTERIOR LIGHTING SYSTEM Article.
B2A29 Left Front Turn Lamp Circuit Open REFER to EXTERIOR LIGHTING SYSTEM Article.
B2A2A Left Front Turn Lamp Circuit Short to Ground REFER to EXTERIOR LIGHTING SYSTEM Article.
B2A2E Right Front Lamp Low Beam Circuit Open REFER to EXTERIOR LIGHTING SYSTEM Article.
B2A2F Right Front Lamp Low Beam Circuit Short to Ground REFER to EXTERIOR LIGHTING SYSTEM Article.
B2A30 Left Front Lamp Low Beam Circuit Open REFER to EXTERIOR LIGHTING SYSTEM Article.
B2A31 Left Front Lamp Low Beam Circuit Short to Ground REFER to EXTERIOR LIGHTING SYSTEM Article.
B2A32 LED Backlighting Output Circuit Open REFER to INSTRUMENT CLUSTER ILLUMINATION AND PANEL ILLUMINATION Article.
B2A33 LED Backlighting Output Circuit Short to Ground REFER to INSTRUMENT CLUSTER ILLUMINATION AND PANEL ILLUMINATION Article.
B2A35 Interior Lighting Output Circuit Open REFER to INTERIOR LIGHTING SYSTEM Article.
B2A36 Interior Lighting Output Circuit Short to Ground REFER to INTERIOR LIGHTING SYSTEM Article.
B2A39 Puddle Lamp Output Circuit Open REFER to INTERIOR LIGHTING SYSTEM Article.
B2A3A Puddle Lamp Output Circuit Short to Ground REFER to INTERIOR LIGHTING SYSTEM Article.
C1125 Brake Fluid Level Sensor Input Circuit Failure REFER to INFORMATION CENTER - INSTRUMENTATION, MESSAGE CENTER, AND WARNING CHIMES Article.
C2780 ECU in Manufacturer Sub-State REFER to WHEELS & TIRES Article.
P062F Internal Control Module EEPROM Error CARRY OUT Programmable Module Installation (PMI). REFER to MODULE CONFIGURATION SYSTEM Article. CLEAR the DTCs. REPEAT the self-test. If DTC P062F is retrieved again, INSTALL a new SJB. REFER to SMART JUNCTION BOX (SJB) . TEST the system for normal operation.
U0155 Lost Communication With Instrument Panel Cluster (IPC) Control Module GO to PINPOINT TEST D .
U2050 No Application Present CARRY out Programmable Module Installation (PMI) on the SJB. REFER to MODULE CONFIGURATION SYSTEM Article. CLEAR the DTCs. REPEAT the self-test. If DTC U2050 is retrieved again, INSTALL a new SJB. REFER to SMART JUNCTION BOX (SJB) . TEST the system for normal operation.
U2472 Unexpected Ignition State REFER to STEERING COLUMN SWITCHES Article.
U2473 Unexpected Vehicle Speed (VSS)
NOTE: Sets during the self-test if vehicle speed exceeds 3 mph (5 kph) or vehicle speed cannot be determined by the SJB.
VERIFY the speedometer operates correctly. If the speedometer does not operate correctly, REFER to INFORMATION CENTER - INSTRUMENTATION, MESSAGE CENTER, AND WARNING CHIMES Article. If the speedometer operates correctly, the self-test is carried out while the vehicle is moving. STOP the vehicle and REPEAT the self-test.
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.

Shop Manual-Ready ToolsCompare Repair QuoteQuote Shield Pro

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 Quote

No obligation. See pricing before you book.