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.
2001 Volvo S80 BaseFACTORY OEM SERVICE PROCEDURE
Central Electronic Module (CEM) DTCS
CENTRAL ELECTRONIC MODULE (CEM) - DTC INDEX
| DTC | Description |
|---|---|
| CEM-1A03 | S-Power supply. Signal too low. Intermittent fault |
| CEM-1A03 | S-Power supply. Signal too low. Permanent fault |
| CEM-1A04 | X-Power supply. Signal too low. Intermittent fault |
| CEM-1A04 | X-Power supply. Signal too low. Permanent fault |
| CEM-1A05 | 30 Power supply. Signal too low. Intermittent fault |
| CEM-1A05 | 30 Power supply. Signal too low. Permanent fault |
| CEM-1A05 | X-Power supply. Signal too high. Intermittent fault |
| CEM-1A05 | X-Power supply. Signal too high. Permanent fault |
| CEM-1A06 | 15-Power supply. Signal too low. Intermittent fault |
| CEM-1A06 | 15-Power supply. Signal too low. Permanent fault |
| CEM-1A07 | 15-Power supply. Signal too high. Intermittent fault |
| CEM-1A07 | 15-Power supply. Signal too high. Permanent fault |
| CEM-1A08 | 50-Power supply. Signal missing. Intermittent fault |
| CEM-1A08 | 50-Power supply. Signal missing. Permanent fault |
| CEM-1A09 | 50-Power supply. Signal too high. Intermittent fault |
| CEM-1A09 | 50-Power supply. Signal too high. Permanent fault |
| CEM-1A21 | Increased power supply relay. Signal too high. Intermittent fault |
| CEM-1A21 | Increased power supply relay. Signal too high. Permanent fault |
| CEM-1A23 | Increased power supply relay. No signal. Intermittent fault |
| CEM-1A23 | Increased power supply relay. No signal. Permanent fault |
| CEM-1A24 | Relay Ext X2-Power supply. Signal too high. Intermittent fault (4T65EV;4T65EV-GT) |
| CEM-1A24 | Relay Ext X2-Power supply. Signal too high. Permanent fault (4T65EV;4T65EV-GT) |
| CEM-1A25 | Relay Ext X2-Power supply. Signal too low. Intermittent fault (4T65EV;4T65EV-GT) |
| CEM-1A25 | Relay Ext X2-Power supply. Signal too low. Permanent fault (4T65EV;4T65EV-GT) |
| CEM-1A41 | Real time clock. Internal fault. Intermittent fault |
| CEM-1A41 | Real time clock. Internal fault. Permanent fault |
| CEM-1A42 | Real time clock. Internal fault. Intermittent fault |
| CEM-1A42 | Real time clock. Internal fault. Permanent fault |
| CEM-1A51 | Communication with the supplemental restraint system module (SRS). Signal missing |
| CEM-1A52 | Communication with the driver door module (DDM). Signal missing |
| CEM-1A53 | Communication with the passenger door module (PDM). Signal missing |
| CEM-1A54 | Communication with the power seat module (PSM). Signal missing |
| CEM-1A55 | Communication with the climate control module (CCM). Signal missing |
| CEM-1A56 | Communication with the driver information module (DIM). Signal missing |
| CEM-1A57 | Communication with the RTI module. Signal missing |
| CEM-1A58 | Communication with the phone module (PHM). Signal missing |
| CEM-1A59 | Communication with the audio module (AUM). Signal missing |
| CEM-1A5A | Communication with the rear electronic module (REM). Signal missing |
| CEM-1A5B | Communication with the steering wheel module (SWM). Signal missing |
| CEM-1A5C | Communication with the upper electronic module (UEM). Signal missing |
| CEM-1A5D | Communication with the electronic throttle module (ETM). Signal missing |
| CEM-1A5E | Communication with the steering wheel angle sensor module (SAS). Signal missing |
| CEM-1A5F | Communication with the ABS control module. Signal missing. Intermittent fault |
| CEM-1A5F | Communication with the ABS control module. Signal missing. Permanent fault |
| CEM-1A61 | Communication with the transmission control module (TCM). Signal missing (4T65EV;4T65EV-GT) |
| CEM-1A62 | Communication with the engine control module (ECM). Signal missing |
| CEM-1C01 | L signal. Signal too high. Intermittent fault |
| CEM-1C01 | L signal. Signal too high. Permanent fault |
| CEM-1C02 | L signal. Signal too low. Intermittent fault |
| CEM-1C02 | L signal. Signal too low. Permanent fault |
| CEM-1C04 | 30 Power supply. Signal too high. Intermittent fault |
| CEM-1C04 | 30 Power supply. Signal too high. Permanent fault |
| CEM-1D01 | Control module. Internal fault. Permanent fault |
| CEM-1D01 | Control module. Internal fault. Intermittent fault |
| CEM-1D02 | Control module, software. Internal fault. Intermittent fault |
| CEM-1D02 | Control module, software. Internal fault. Permanent fault |
| CEM-1D03 | Control module not fully programmed. Internal fault. Intermittent fault |
| CEM-1D03 | Control module not fully programmed. Internal fault. Permanent fault |
| CEM-1D04 | ECM, software. Faulty signal. Intermittent fault |
| CEM-1D04 | ECM, software. Faulty signal. Permanent fault |
| CEM-1D05 | TCM, software. Faulty signal. Intermittent fault |
| CEM-1D05 | TCM, software. Faulty signal. Permanent fault |
| CEM-1D07 | Control module. Internal fault. Intermittent fault |
| CEM-1D07 | Control module. Internal fault. Permanent fault |
| CEM-1D08 | Control module. Internal fault. Intermittent fault |
| CEM-1D08 | Control module. Internal fault. Permanent fault |
| CEM-1D09 | Control module. Internal fault. Intermittent fault |
| CEM-1D09 | Control module. Internal fault. Permanent fault |
| CEM-1D0A | Control module. Internal fault. Intermittent fault |
| CEM-1D0A | Control module. Internal fault. Permanent fault |
| CEM-1D0C | Control module. Internal fault. Intermittent fault |
| CEM-1D0C | Control module. Internal fault. Permanent fault |
| CEM-1E04 | Communication with the lamp switch module. Signal missing. Intermittent fault |
| CEM-1E04 | Communication with the lamp switch module. Signal missing. Permanent fault |
| CEM-1E05 | Communication with the additional heater module. Signal missing. Permanent fault |
| CEM-1E05 | Communication with the additional heater module. Signal missing. Intermittent fault |
| CEM-2E01 | Power steering. Signal faulty. Intermittent fault |
| CEM-2E01 | Power steering. Signal faulty. Permanent fault |
| CEM-2E03 | Power steering. Faulty set-up |
| CEM-2E04 | Power steering. Parameter fault |
| CEM-2FA1 | Driver seatbelt lock. Signal too high. Intermittent fault |
| CEM-2FA1 | Driver seatbelt lock. Signal too high. Permanent fault |
| CEM-2FA2 | Driver seatbelt lock. Signal too low. Intermittent fault |
| CEM-2FA2 | Driver seatbelt lock. Signal too low. Permanent fault |
| CEM-2FA3 | Driver seatbelt lock. Signal faulty. Permanent fault |
| CEM-2FA4 | Passenger seatbelt lock. Signal too high. Intermittent fault |
| CEM-2FA4 | Passenger seatbelt lock. Signal too high. Permanent fault |
| CEM-2FA5 | Passenger seatbelt lock. Signal too low. Intermittent fault |
| CEM-2FA5 | Passenger seatbelt lock. Signal too low. Permanent fault |
| CEM-2FA6 | Passenger seatbelt lock. Signal faulty. Permanent fault |
| CEM-3A01 | Fuel pump. Signal missing. Permanent fault |
| CEM-3A02 | fuel pump. Signal faulty |
| CEM-3A03 | Fuel pump. Signal too low. Intermittent fault |
| CEM-3A03 | Fuel pump. Signal too low. Permanent fault |
| CEM-3A04 | Fuel pump. Signal too high. Intermittent fault |
| CEM-3A04 | Fuel pump. Signal too high. Permanent fault |
| CEM-3A05 | fuel pump. Signal too low. Intermittent fault |
| CEM-3A05 | fuel pump. Signal too low. Permanent fault |
| CEM-3F02 | Shift lock signal. Signal too high. Intermittent fault |
| CEM-3F02 | Shift lock signal. Signal too high. Permanent fault |
| CEM-3F03 | Shift lock signal. Signal missing. Intermittent fault |
| CEM-3F03 | Shift lock signal. Signal missing. Permanent fault |
| CEM-3F81 | Immobilizer signal. Signal too high. Intermittent fault |
| CEM-3F81 | Immobilizer signal. Signal too high. Permanent fault |
| CEM-3F82 | Immobilizer signal. Signal too low. Intermittent fault |
| CEM-3F82 | Immobilizer signal. Signal too low. Permanent fault |
| CEM-5B01 | LH heating element. Signal faulty. Intermittent fault |
| CEM-5B01 | LH heating element. Signal faulty. Permanent fault |
| CEM-5B02 | RH heating element. Signal faulty. Intermittent fault |
| CEM-5B02 | RH heating element. Signal faulty. Permanent fault |
| CEM-5B05 | Left seat heater. Signal too low. Intermittent fault |
| CEM-5B05 | Left seat heater. Signal too low. Permanent fault |
| CEM-5B06 | Right seat heater. Signal too low. Intermittent fault |
| CEM-5B06 | Right seat heater. Signal too low. Permanent fault |
| CEM-5B07 | Left seat heater. Signal too high. Intermittent fault |
| CEM-5B07 | Left seat heater. Signal too high. Permanent fault |
| CEM-5B08 | Right seat heater. Signal too high. Intermittent fault |
| CEM-5B08 | Right seat heater. Signal too high. Permanent fault |
| CEM-5B09 | Communication with the seat heater module. Signal missing. Intermittent fault |
| CEM-5B09 | Communication with the seat heater module. Signal missing. Permanent fault |
| CEM-5B10 | Communication with the seat heater module. Signal missing. Intermittent fault |
| CEM-5B10 | Communication with the seat heater module. Signal missing. Permanent fault |
| CEM-5F11 | Relay, auxiliary heater. Signal too high. Intermittent fault (B6284T) |
| CEM-5F11 | Relay, auxiliary heater. Signal too high. Intermittent fault (B6294S) |
| CEM-5F11 | Relay, auxiliary heater. Signal too high. Permanent fault (B6284T) |
| CEM-5F11 | Relay, auxiliary heater. Signal too high. Permanent fault (B6294S) |
| CEM-5F13 | Relay, auxiliary heater. Signal too low. Intermittent fault (B6284T) |
| CEM-5F13 | Relay, auxiliary heater. Signal too low. Intermittent fault (B6294S) |
| CEM-5F13 | Relay, auxiliary heater. Signal too low. Permanent fault (B6284T) |
| CEM-5F13 | Relay, auxiliary heater. Signal too low. Permanent fault (B6294S) |
| CEM-5F31 | Coolant temperature sensor Open circuit or short circuit to supply (B6284T) |
| CEM-5F31 | Coolant temperature sensor Open circuit or short circuit to supply (B6294S) |
| CEM-5F32 | Coolant temperature sensor Short circuit to ground (B6284T) |
| CEM-5F32 | Coolant temperature sensor Short circuit to ground (B6294S) |
| CEM-5F36 | Flame sensor Short circuit to ground (B6284T) |
| CEM-5F36 | Flame sensor Short circuit to ground (B6294S) |
| CEM-5F37 | Production diagnostic trouble code. Faulty code (B6284T) |
| CEM-5F37 | Production diagnostic trouble code. Faulty code (B6294S) |
| CEM-5F39 | Flame sensor Flame interuption (B6284T) |
| CEM-5F39 | Flame sensor Flame interuption (B6294S) |
| CEM-5F3A | Water pump. Signal too high (B6284T) |
| CEM-5F3A | Water pump. Signal too high (B6294S) |
| CEM-5F3B | Water pump. Signal too low (B6284T) |
| CEM-5F3B | Water pump. Signal too low (B6294S) |
| CEM-5F3C | Heater fan. Signal too high (B6284T) |
| CEM-5F3C | Heater fan. Signal too high (B6294S) |
| CEM-5F3D | Heater fan. Signal too low (B6284T) |
| CEM-5F3D | Heater fan. Signal too low (B6294S) |
| CEM-5F3E | Heater fan. Signal faulty (B6284T) |
| CEM-5F3E | Heater fan. Signal faulty (B6294S) |
| CEM-5F3F | Fuel pump. Signal too high (B6284T) |
| CEM-5F3F | Fuel pump. Signal too high (B6294S) |
| CEM-5F40 | Fuel pump. Signal too low (B6284T) |
| CEM-5F40 | Fuel pump. Signal too low (B6294S) |
| CEM-5F41 | Overheat thermostat. Signal too low (B6284T) |
| CEM-5F41 | Overheat thermostat. Signal too low (B6294S) |
| CEM-5F42 | Power supply. Faulty (B6284T) |
| CEM-5F42 | Power supply. Faulty (B6294S) |
| CEM-5F43 | Power supply. Missing (B6284T) |
| CEM-5F43 | Power supply. Missing (B6294S) |
| CEM-5F46 | Glow plug. Signal faulty (B6284T) |
| CEM-5F46 | Glow plug. Signal faulty (B6294S) |
| CEM-5F47 | Control unit power supply. Signal too high (B6284T) |
| CEM-5F47 | Control unit power supply. Signal too high (B6294S) |
| CEM-5F4C | Undervoltage. Signal too low (B6284T) |
| CEM-5F4C | Undervoltage. Signal too low (B6294S) |
| CEM-5F4D | Diagnostic system. Too long (B6284T) |
| CEM-5F4D | Diagnostic system. Too long (B6294S) |
| CEM-5F4F | Start attempt. Too many unsuccessful attempts (B6284T) |
| CEM-5F4F | Start attempt. Too many unsuccessful attempts (B6294S) |
| CEM-5F50 | Overheat thermostat. Signal too high (B6284T) |
| CEM-5F50 | Overheat thermostat. Signal too high (B6294S) |
| CEM-6A01 | Rear left door unlocked. Signal too high. Intermittent fault |
| CEM-6A01 | Rear left door unlocked. Signal too high. Permanent fault |
| CEM-6A02 | Rear right door unlocked. Signal too high. Intermittent fault |
| CEM-6A02 | Rear right door unlocked. Signal too high. Permanent fault |
| CEM-6A03 | Rear left door locked. Signal too low. Intermittent fault |
| CEM-6A03 | Rear left door locked. Signal too low. Permanent fault |
| CEM-6A04 | Rear right door locked. Signal too low. Intermittent fault |
| CEM-6A04 | Rear right door locked. Signal too low. Permanent fault |
| CEM-6C41 | Antenna/light ring wire clock-signal (ICK). Signal too high. Intermittent fault |
| CEM-6C41 | Antenna/light ring wire clock-signal (ICK). Signal too high. Permanent fault |
| CEM-6C42 | Antenna/light ring wire clock-signal (ICK). Signal too low. Intermittent fault |
| CEM-6C42 | Antenna/light ring wire clock-signal (ICK). Signal too low. Permanent fault |
| CEM-6C43 | Antenna/light ring data communication (IDS). Signal too high. Permanent fault |
| CEM-6C43 | Antenna/light ring wire data communication (IDS). Signal too high. Intermittent fault |
| CEM-6C44 | Antenna/light ring wire data communication (IDS). Signal too low. Intermittent fault |
| CEM-6C44 | Antenna/light ring wire data communication (IDS). Signal too low. Permanent fault |
| CEM-6C46 | Antenna/light ring. Internal fault. Permanent fault |
| CEM-6C46 | Antenna/light ring. Internal fault. Intermittent fault |
| CEM-6C48 | Transponder type. Signal faulty. Intermittent fault |
| CEM-6C48 | Transponder type. Signal faulty. Permanent fault |
| CEM-6C49 | Transponder communication. Signal faulty. Intermittent fault |
| CEM-6C49 | Transponder communication. Signal faulty. Permanent fault |
| CEM-6D01 | Relay, window lift LR up. Signal too high. Intermittent fault |
| CEM-6D01 | Relay, window lift LR up. Signal too high. Permanent fault |
| CEM-6D03 | Relay, window lift LR up. Signal too low. Intermittent fault |
| CEM-6D03 | Relay, window lift LR up. Signal too low. Permanent fault |
| CEM-6D04 | Relay, window lift LR down. Signal too high. Intermittent fault |
| CEM-6D04 | Relay, window lift LR down. Signal too high. Permanent fault |
| CEM-6D06 | Relay, window lift LR down Signal too low. Intermittent fault |
| CEM-6D06 | Relay, window lift LR down. Signal too low. Permanent fault |
| CEM-6D07 | Relay, window lift RR up. Signal too high. Intermittent fault |
| CEM-6D07 | Relay, window lift RR up. Signal too high. Permanent fault |
| CEM-6D09 | Relay, window lift RR up. Signal too low. Intermittent fault |
| CEM-6D09 | Relay, window lift RR up. Signal too low. Permanent fault |
| CEM-6D0A | Relay, window lift RR down. Signal too high. Intermittent fault |
| CEM-6D0A | Relay, window lift RR down. Signal too high. Permanent fault |
| CEM-6D0C | Relay, window lift RR down. Signal too low. Intermittent fault |
| CEM-6D0C | Relay, window lift RR down. Signal too low. Permanent fault |
| CEM-6D0D | Relay, child safety blocking. Signal too high. Intermittent fault |
| CEM-6D0D | Relay, child safety blocking. Signal too high. Permanent fault |
| CEM-6D0F | Relay, child safety blocking. Signal too low. Intermittent fault |
| CEM-6D0F | Relay, child safety blocking. Signal too low. Permanent fault |
| CEM-8A01 | Invalid switch position for light switch. Signal faulty. Intermittent fault |
| CEM-8A01 | Invalid switch position for light switch. Signal faulty. Permanent fault |
| CEM-8A02 | Main beam relay. Signal too high. Intermittent fault |
| CEM-8A02 | Main beam relay. Signal too high. Permanent fault |
| CEM-8A04 | Main beam relay. Signal missing. Intermittent fault |
| CEM-8A04 | Main beam relay. Signal missing. Permanent fault |
| CEM-8A05 | Dipped headlamp relay. Signal too high. Intermittent fault |
| CEM-8A05 | Dipped headlamp relay. Signal too high. Permanent fault |
| CEM-8A07 | Dipped headlamp relay. Signal missing. Intermittent fault |
| CEM-8A07 | Dipped headlamp relay. Signal missing. Permanent fault |
| CEM-8A08 | Extra lamp relay. Signal too high. Intermittent fault |
| CEM-8A08 | Extra lamp relay. Signal too high. Permanent fault |
| CEM-8A0A | Extra lamp relay. Signal missing. Intermittent fault |
| CEM-8A0A | Extra lamp relay. Signal missing. Permanent fault |
| CEM-8B01 | Position lamp relay. Signal too high. Intermittent fault |
| CEM-8B01 | Position lamp relay. Signal too high. Permanent fault |
| CEM-8B03 | Position lamp relay. Signal missing. Intermittent fault |
| CEM-8B03 | Position lamp relay. Signal missing. Permanent fault |
| CEM-8C11 | Front fog lamp switch. Signal too low. Intermittent fault |
| CEM-8C11 | Front fog lamp switch. Signal too low. Permanent fault |
| CEM-8C12 | Rear fog lamp switch. Signal too low. Intermittent fault |
| CEM-8C12 | Rear fog lamp switch. Signal too low. Permanent fault |
| CEM-8C13 | Front fog lamp relay. Signal too high. Intermittent fault |
| CEM-8C13 | Front fog lamp relay. Signal too high. Permanent fault |
| CEM-8C15 | Front fog lamp relay. Signal missing. Intermittent fault |
| CEM-8C15 | Front fog lamp relay. Signal missing. Permanent fault |
| CEM-8D01 | Ignition lock light and extra brake light. Signal too low. Intermittent fault |
| CEM-8D01 | Ignition lock light and extra brake light. Signal too low. Permanent fault |
| CEM-8E01 | Reversing light. Signal too low. Intermittent fault |
| CEM-8E01 | Reversing light. Signal too low. Permanent fault |
| CEM-8F01 | Warning flasher and glovebox light. Signal too low. Intermittent fault |
| CEM-8F01 | Warning flasher and glovebox light. Signal too low. Permanent fault |
| CEM-8F02 | Left direction indicator. Signal too low. Intermittent fault |
| CEM-8F02 | Left direction indicator. Signal too low. Permanent fault |
| CEM-8F03 | Right direction indicator. Signal too low. Intermittent fault |
| CEM-8F03 | Right direction indicator. Signal too low. Permanent fault |
| CEM-8F11 | Light width control. Signal too high. Intermittent fault |
| CEM-8F11 | Light width control. Signal too high. Permanent fault |
| CEM-8F12 | Beam setting control. Signal too low. Intermittent fault |
| CEM-8F12 | Beam setting control. Signal too low. Permanent fault |
| CEM-8F13 | Light width control. Signal too high. Intermittent fault |
| CEM-8F13 | Light width control. Signal too high. Permanent fault |
| CEM-8F14 | Light width control. Signal too high. Permanent fault |
| CEM-8F14 | Light width control. Signal too high. Intermittent fault |
| CEM-8F21 | Wipers. Signal too high/Signal missing. Intermittent fault |
| CEM-8F21 | Wipers. Signal too high/Signal missing. Permanent fault |
| CEM-8F22 | Wipers. Signal too low. Intermittent fault |
| CEM-8F22 | Wipers. Signal too low. Permanent fault |
| CEM-8F23 | Relay, windshield wiper. Signal too high. Intermittent fault |
| CEM-8F23 | Relay, windshield wiper. Signal too high. Permanent fault |
| CEM-8F25 | Relay, windshield wiper. Signal too low. Intermittent fault |
| CEM-8F25 | Relay, windshield wiper. Signal too low. Permanent fault |
| CEM-8F26 | Windshield wiper, high speed relay. Signal too high. Intermittent fault |
| CEM-8F26 | Windshield wiper, high speed relay. Signal too high. Permanent fault |
| CEM-8F28 | Windshield wiper, high speed relay. Signal missing. Intermittent fault |
| CEM-8F28 | Windshield wiper, high speed relay. Signal missing. Permanent fault |
| CEM-8F29 | Relay, front screen washer motor. Signal too high. Intermittent fault |
| CEM-8F29 | Relay, front screen washer motor. Signal too high. Permanent fault |
| CEM-8F2B | Windshield washer motor, relay. Signal missing. Intermittent fault |
| CEM-8F2B | Windshield washer motor, relay. Signal missing. Permanent fault |
| CEM-8F2C | Wipers. Signal too high. Intermittent fault |
| CEM-8F2C | Wipers. Signal too high. Permanent fault |
| CEM-8F2D | Wipers. Signal too low. Intermittent fault |
| CEM-8F2D | Wipers. Signal too low. Permanent fault |
| CEM-8F2E | Wipers. Signal too low. Intermittent fault |
| CEM-8F2E | Wipers. Signal too low. Permanent fault |
| CEM-8FA1 | Relay, horn. Signal too high. Intermittent fault |
| CEM-8FA1 | Relay, horn. Signal too high. Permanent fault |
| CEM-8FA3 | Relay, signal horn. No signal. Intermittent fault |
| CEM-8FA3 | Relay, signal horn. No signal. Permanent fault |
| CEM-9F24 | Rheostat. Signal too high. Intermittent fault |
| CEM-9F24 | Rheostat. Signal too high. Permanent fault |
| CEM-9F25 | Rheostat. Signal too low. Intermittent fault |
| CEM-9F25 | Rheostat. Signal too low. Permanent fault |
| CEM-DF03 | CAN-H, low speed network Signal too high. Intermittent fault |
| CEM-DF03 | CAN-H, low speed network Signal too high. Permanent fault |
| CEM-DF04 | CAN-L, low-speed network. Signal too low. Intermittent fault |
| CEM-DF04 | CAN-L, low-speed network. Signal too low. Permanent fault |
| CEM-DF05 | CAN-H, low-speed network. Signal too low. Intermittent fault |
| CEM-DF05 | CAN-H, low-speed network. Signal too low. Permanent fault |
| CEM-DF06 | CAN-L, low-speed network. Signal too high. Intermittent fault |
| CEM-DF06 | CAN-L, low-speed network. Signal too high. Permanent fault |
| CEM-DF13 | CAN-H, high-speed network. Signal too high. Intermittent fault |
| CEM-DF13 | CAN-H, high-speed network. Signal too high. Permanent fault |
| CEM-DF14 | CAN-L, high-speed network. Signal too low. Intermittent fault |
| CEM-DF14 | CAN-L, high-speed network. Signal too low. Permanent fault |
| CEM-DF15 | CAN-H, high-speed network. Signal too low. Intermittent fault |
| CEM-DF15 | CAN-H, high-speed network. Signal too low. Permanent fault |
| CEM-DF16 | CAN-L, high-speed network. Signal too high. Intermittent fault |
| CEM-DF16 | CAN-L, high-speed network. Signal too high. Permanent fault |
| CEM-E000 | Control module communication. Faulty communication |
| CEM-E001 | Control module communication. Faulty communication |
| CEM-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.
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.