1999 Volvo S80 BaseFACTORY OEM SERVICE PROCEDURE

Rear Electronic Module (Rem) DTCS

REAR ELECTRONIC MODULE (REM) - DTC INDEX

DTC Description
REM-1A01 30-Power supply. Signal too low. Intermittent fault
REM-1A01 30-Power supply. Signal too low. Permanent fault
REM-1D01 Control unit. Internal fault. Intermittent fault
REM-1D01 Control unit. Internal fault. Permanent fault
REM-1D02 Control unit software. Internal fault. Intermittent fault
REM-1D02 Control unit software. Internal fault. Permanent fault
REM-1D03 Control unit not fully programmed. Internal fault. Intermittent fault
REM-1D03 Control unit not fully programmed. Internal fault. Permanent fault
REM-1D07 Control unit. Internal fault. Intermittent fault
REM-1D07 Control unit. Internal fault. Permanent fault
REM-4A31 Fuel gauge sensor. Signal faulty. Intermittent fault
REM-4A31 Fuel gauge sensor. Signal faulty. Permanent fault
REM-4A33 Fuel gauge sensor. Signal too high/Signal missing. Intermittent fault
REM-4A33 Fuel gauge sensor. Signal too high/Signal missing. Permanent fault
REM-4A34 Fuel gauge sensor. Signal too low. Intermittent fault
REM-4A34 Fuel gauge sensor. Signal too low. Permanent fault
REM-4A35 Fuel gauge sensor. Signal faulty. Intermittent fault
REM-4A35 Fuel gauge sensor. Signal faulty. Permanent fault
REM-4A37 Fuel gauge sensor. Signal too high/Signal missing. Intermittent fault
REM-4A37 Fuel gauge sensor. Signal too high/Signal missing. Permanent fault
REM-4A38 Fuel gauge sensor. Signal too low. Intermittent fault
REM-4A38 Fuel gauge sensor. Signal too low. Permanent fault
REM-6A01 Locking relay. Rear left door central locking. Signal too high. Intermittent fault
REM-6A01 Locking relay. Rear left door central locking. Signal too high. Permanent fault
REM-6A03 Locking relay. Rear left door central locking. Signal missing. Intermittent fault
REM-6A03 Locking relay. Rear left door central locking. Signal missing. Permanent fault
REM-6A04 Unlocking relay. Rear left door central locking. Signal too high. Intermittent fault
REM-6A04 Unlocking relay. Rear left door central locking. Signal too high. Permanent fault
REM-6A05 Unlocking relay. Rear left door central locking. Signal missing/too low. Intermittent fault
REM-6A05 Unlocking relay. Rear left door central locking. Signal missing/too low. Permanent fault
REM-6A06 Unlocking relay. Deadlock position (BLL). Signal too high. Intermittent fault
REM-6A06 Unlocking relay. Deadlock position (BLL). Signal too high. Permanent fault
REM-6A08 Unlocking relay. Deadlock position (BLL). Signal missing/too low. Intermittent fault
REM-6A08 Unlocking relay. Deadlock position (BLL). Signal missing/too low. Permanent fault
REM-6A09 Locking relay. Rear left door central locking. Signal too high. Intermittent fault
REM-6A09 Locking relay. Rear left door central locking. Signal too high. Permanent fault
REM-6A0B Locking relay. Rear right door central locking. Signal missing/too low. Intermittent fault
REM-6A0B Locking relay. Rear right door central locking. Signal missing/too low. Permanent fault
REM-6A0C Unlocking relay. Rear right door central locking. Signal too high. Intermittent fault
REM-6A0C Unlocking relay. Rear right door central locking. Signal too high. Permanent fault
REM-6A0E Unlocking relay. Rear right door central locking. Signal missing/too low. Intermittent fault
REM-6A0E Unlocking relay. Rear right door central locking. Signal missing/too low. Permanent fault
REM-6C11 Level sensor, power supply. Signal too high. Intermittent fault
REM-6C11 Level sensor, power supply. Signal too high. Permanent fault
REM-6C12 Level sensor, voltage supply. Signal too low. Intermittent fault
REM-6C12 Level sensor, voltage supply. Signal too low. Permanent fault
REM-6C15 Communication with level sensor. Signal missing. Intermittent fault
REM-6C15 Communication with level sensor. Signal missing. Permanent fault
REM-6C16 Level sensor. Internal fault. Intermittent fault
REM-6C16 Level sensor. Internal fault. Permanent fault
REM-6F11 Head rest relay Signal too high. Permanent fault
REM-6F11 Head restraint relay. Signal too high. Intermittent fault
REM-6F13 Head restraint relay. Signal missing. Intermittent fault
REM-6F13 Head restraint relay. Signal missing. Permanent fault
REM-6F51 Boot lid handle. Signal too low. Intermittent fault
REM-6F51 Boot lid handle. Signal too low. Permanent fault
REM-6F52 Unlocking relay. Boot lid central locking. Signal too high. Intermittent fault
REM-6F52 Unlocking relay. Boot lid central locking. Signal too high. Permanent fault
REM-6F54 Unlocking relay. Boot lid central locking. Signal missing/too low. Intermittent fault
REM-6F54 Unlocking relay. Boot lid central locking. Signal missing/too low. Permanent fault
REM-6F71 Locking relay. Tank hatch central locking. Signal too high. Intermittent fault
REM-6F71 Locking relay. Tank hatch central locking. Signal too high. Permanent fault
REM-6F73 Locking relay. Tank hatch central locking. Signal missing/too low. Intermittent fault
REM-6F73 Locking relay. Tank hatch central locking. Signal missing/too low. Permanent fault
REM-6F74 Unlocking relay. Tank hatch central locking. Signal too high. Intermittent fault
REM-6F74 Unlocking relay. Tank hatch central locking. Signal too high. Permanent fault
REM-6F76 Unlocking relay. Tank hatch central locking. Signal missing/too low. Intermittent fault
REM-6F76 Unlocking relay. Tank hatch central locking. Signal missing/too low. Permanent fault
REM-8C21 Rear fog lamp relay. Signal too high. Intermittent fault
REM-8C21 Rear fog lamp relay. Signal too high. Permanent fault
REM-8C23 Rear fog lamp relay. Signal missing. Intermittent fault
REM-8C23 Rear fog lamp relay. Signal missing. Permanent fault
REM-8D11 Boot lighting. Signal faulty. Intermittent fault
REM-8D11 Boot lighting. Signal faulty. Permanent fault
REM-8E11 Reversing light relay. Signal too high. Intermittent fault
REM-8E11 Reversing light relay. Signal too high. Permanent fault
REM-8E13 Reversing light relay. Signal missing. Intermittent fault
REM-8E13 Reversing light relay. Signal missing. Permanent fault
REM-8F61 Rear window defroster relay. Signal too high. Intermittent fault
REM-8F61 Rear window defroster relay. Signal too high. Permanent fault
REM-8F63 Rear window defroster relay. Signal missing. Intermittent fault
REM-8F63 Rear window defroster relay. Signal missing. Permanent fault
REM-E001 Control module communication. Faulty communication
REM-E003 Configuration fault. Faulty configuration
REM-XXXX Unknown diagnostic trouble code (DTC) for the current control module version
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.