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.
2003 Volvo S80 T-6FACTORY OEM SERVICE PROCEDURE
Engine Control Module (ECM) Diagnostic Trouble Codes - 11 Of 11
- ECM-91DF: Brake Pedal Position. Faulty Position (B6284T; 1999-2000)
- ECM-91DF: Brake Pedal Position. Faulty Position (B6284T; B6294S; 2001)
- ECM-91DF: Brake Pedal Position. Faulty Position (B6294S; 2000)
- ECM-91DF: Brake Pedal Position. Faulty Position (B6304S3; 1999)
- ECM-91E0: Throttle Valve. Too High Supply Voltage (B6284T; 1999-2001)
- ECM-91E0: Throttle Valve. Too High Supply Voltage (B6294S; 2000-2001)
- ECM-91E0: Throttle Valve. Too High Supply Voltage (B6304S3; 1999)
- ECM-91F0: Throttle Position (TP). Faulty Current (B6284T; 1999-2001)
- ECM-91F0: Throttle Position (TP). Faulty Current (B6294S; 2000-2001)
- ECM-91F0: Throttle Position (TP). Faulty Current (B6304S3; 1999)
- ECM-9200: Throttle Position (TP) Sensor. Faulty Signal (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-9210: Electronic Throttle Unit, Potentiometer 1. Faulty Signal (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-921C: Electronic Throttle Unit, Potentiometer 1. Signal Too High (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-921D: Electronic Throttle Unit, Potentiometer 1. Signal Too Low (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-9220: Electronic Throttle Unit, Potentiometer 2. Faulty Signal (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-922C: Electronic Throttle Unit, Potentiometer 2. Signal Too High (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-922D: Electronic Throttle Unit, Potentiometer 2. Signal Too Low (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-9240: Engine Control Module (ECM). Faulty Signal (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-925C: Electronic Throttle Unit. Signal Too High (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-925D: Electronic Throttle Unit. Signal Too Low (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-926C: Electronic Throttle Unit. Signal Too High (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-926D: Electronic Throttle Unit. Signal Too Low (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-9270: Throttle Unit. Faulty Signal (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-9280: Throttle Unit. Faulty Signal (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-928C: Cruise Control. Signal Missing. Intermittent Fault (B6284T; 1999-2001)
- ECM-928C: Cruise Control. Signal Missing. Intermittent Fault (B6294S; 2000-2001)
- ECM-928C: Cruise Control. Signal Missing. Intermittent Fault (B6304S3; 1999)
- ECM-928C: Cruise Control. Signal Missing. Permanent Fault (B6284T; 1999-2001)
- ECM-928C: Cruise Control. Signal Missing. Permanent Fault (B6294S; 2000-2001)
- ECM-928C: Cruise Control. Signal Missing. Permanent Fault (B6304S3; 1999)
- ECM-928C: Cruise Control. Signal Too High. Intermittent Fault (B6284T; 1999-2001)
- ECM-928C: Cruise Control. Signal Too High. Intermittent Fault (B6294S; 2000-2001)
- ECM-928C: Cruise Control. Signal Too High. Intermittent Fault (B6304S3; 1999)
- ECM-928C: Cruise Control. Signal Too High. Permanent Fault (B6284T; 1999-2001)
- ECM-928C: Cruise Control. Signal Too High. Permanent Fault (B6294S; 2000-2001)
- ECM-928C: Cruise Control. Signal Too High. Permanent Fault (B6304S3; 1999)
- ECM-928C: Cruise Control. Signal Too Low. Intermittent Fault (B6284T; 1999-2001)
- ECM-928C: Cruise Control. Signal Too Low. Intermittent Fault (B6294S; 2000-2001)
- ECM-928C: Cruise Control. Signal Too Low. Intermittent Fault (B6304S3; 1999)
- ECM-928C: Cruise Control. Signal Too Low. Permanent Fault (B6284T; 1999-2001)
- ECM-928C: Cruise Control. Signal Too Low. Permanent Fault (B6294S; 2000-2001)
- ECM-928C: Cruise Control. Signal Too Low. Permanent Fault (B6304S3; 1999)
- ECM-928C: Control Module, Communication Problems. Faulty Signal (B5254T2; 2004)
- ECM-928C: Control Module, Communication Problems. Faulty Signal (B6294S2; B6294T; 2002-2004)
- ECM-9290: Engine Control Module (ECM). Faulty Signal (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-929C: Engine Control Module (ECM). Signal Too High (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-929D: Engine Control Module (ECM). Signal Too Low (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-92B0: Electronic Throttle Unit. Faulty Signal (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-92CC: Electronic Throttle Unit. Signal Too High (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-92CD: Electronic Throttle Unit. Signal Too Low (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-92D0: Electronic Throttle Unit. Faulty Signal (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-92E0: Engine Control Module (ECM). Internal Fault (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-9300: Clutch Pedal Position Sensor, Faulty Signal. Signal Too High. Intermittent Fault (B6284T; 1999-2001)
- ECM-9300: Clutch Pedal Position Sensor, Faulty Signal. Signal Too High. Intermittent Fault (B6294S; 2000-2001)
- ECM-9300: Clutch Pedal Position Sensor, Faulty Signal. Signal Too High. Intermittent Fault (B6304S3; 1999)
- ECM-9300: Clutch Pedal Position Sensor, Faulty Signal. Signal Too High. Permanent Fault (B6284T; 1999-2001)
- ECM-9300: Clutch Pedal Position Sensor, Faulty Signal. Signal Too High. Permanent Fault (B6294S; 2000-2001)
- ECM-9300: Clutch Pedal Position Sensor, Faulty Signal. Signal Too High. Permanent Fault (B6304S3; 1999)
- ECM-9300: Clutch Pedal Position Sensor, Faulty Signal. Signal Too Low. Intermittent Fault (B6284T; 1999-2001)
- ECM-9300: Clutch Pedal Position Sensor, Faulty Signal. Signal Too Low. Intermittent Fault (B6294S; 2000-2001)
- ECM-9300: Clutch Pedal Position Sensor, Faulty Signal. Signal Too Low. Intermittent Fault (B6304S3; 1999)
- ECM-9300: Clutch Pedal Position Sensor, Faulty Signal. Signal Too Low. Permanent Fault (B6284T; 1999-2001)
- ECM-9300: Clutch Pedal Position Sensor, Faulty Signal. Signal Too Low. Permanent Fault (B6294S; 2000-2001)
- ECM-9300: Clutch Pedal Position Sensor, Faulty Signal. Signal Too Low. Permanent Fault (B6304S3; 1999)
- ECM-9300: Clutch Pedal Position Sensor. Faulty Signal (B5254T2; 2004)
- ECM-9300: Clutch Pedal Position Sensor. Faulty Signal (B6294S2; B6294T; 2002-2004)
- ECM-9300: Clutch Pedal Position Sensor. Faulty Signal. Intermittent Fault (B6284T; 1999-2001)
- ECM-9300: Clutch Pedal Position Sensor. Faulty Signal. Intermittent Fault (B6294S; 2000-2001)
- ECM-9300: Clutch Pedal Position Sensor. Faulty Signal. Intermittent Fault (B6304S3; 1999)
- ECM-9300: Clutch Pedal Position Sensor. Faulty Signal. Permanent Fault (B6284T; 1999-2001)
- ECM-9300: Clutch Pedal Position Sensor. Faulty Signal. Permanent Fault (B6294S; 2000-2001)
- ECM-9300: Clutch Pedal Position Sensor. Faulty Signal. Permanent Fault (B6304S3; 1999)
- ECM-9300: Clutch Pedal Position Sensor. Signal Too High (B5254T2; 2004)
- ECM-9300: Clutch Pedal Position Sensor. Signal Too High (B6294S2; B6294T; 2002-2004)
- ECM-9300: Clutch Pedal Position Sensor. Signal Too Low (B5254T2; 2004)
- ECM-9300: Clutch Pedal Position Sensor. Signal Too Low (B6294S2; B6294T; 2002-2004)
- ECM-9300: Control Module Communication Problems. Faulty Signal (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-930B: Control Module Communication Problems. Signal Missing (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-930C: Control Module, Communication Problems. Signal Too High (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-930D: Control Module Communication Problems. Signal Too Low (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-9400: Accelerator Pedal (AP) Position Sensor, Analog Signal. Faulty Signal (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-9400: Brake Pedal Position Sensor, Faulty Signal. Signal Too High. Intermittent Fault (B6284T; 1999-2001)
- ECM-9400: Brake Pedal Position Sensor, Faulty Signal. Signal Too High. Intermittent Fault (B6294S; 2000-2001)
- ECM-9400: Brake Pedal Position Sensor, Faulty Signal. Signal Too High. Intermittent Fault (B6304S3; 1999)
- ECM-9400: Brake Pedal Position Sensor, Faulty Signal. Signal Too High. Permanent Fault (B6284T; 1999-2001)
- ECM-9400: Brake Pedal Position Sensor, Faulty Signal. Signal Too High. Permanent Fault (B6294S; 2000-2001)
- ECM-9400: Brake Pedal Position Sensor, Faulty Signal. Signal Too High. Permanent Fault (B6304S3; 1999)
- ECM-9400: Brake Pedal Position Sensor, Faulty Signal. Signal Too Low. Intermittent Fault (B6284T; 1999-2001)
- ECM-9400: Brake Pedal Position Sensor, Faulty Signal. Signal Too Low. Intermittent Fault (B6294S; 2000-2001)
- ECM-9400: Brake Pedal Position Sensor, Faulty Signal. Signal Too Low. Intermittent Fault (B6304S3; 1999)
- ECM-9400: Brake Pedal Position Sensor, Faulty Signal. Signal Too Low. Permanent Fault (B6284T; 1999-2001)
- ECM-9400: Brake Pedal Position Sensor, Faulty Signal. Signal Too Low. Permanent Fault (B6294S; 2000-2001)
- ECM-9400: Brake Pedal Position Sensor, Faulty Signal. Signal Too Low. Permanent Fault (B6304S3; 1999)
- ECM-9400: Brake Pedal Position Sensor. Faulty Signal. Intermittent Fault (B6284T; 1999-2001)
- ECM-9400: Brake Pedal Position Sensor. Faulty Signal. Intermittent Fault (B6294S; 2000-2001)
- ECM-9400: Brake Pedal Position Sensor. Faulty Signal. Intermittent Fault (B6304S3; 1999)
- ECM-9400: Brake Pedal Position Sensor. Faulty Signal. Permanent Fault (B6284T; 1999-2001)
- ECM-9400: Brake Pedal Position Sensor. Faulty Signal. Permanent Fault (B6294S; 2000-2001)
- ECM-9400: Brake Pedal Position Sensor. Faulty Signal. Permanent Fault (B6304S3; 1999)
- ECM-9400: Brake Pedal Position Sensor. Signal Missing. Intermittent Fault (B6284T; 1999-2001)
- ECM-9400: Brake Pedal Position Sensor. Signal Missing. Intermittent Fault (B6294S; 2000-2001)
- ECM-9400: Brake Pedal Position Sensor. Signal Missing. Intermittent Fault (B6304S3; 1999)
- ECM-9400: Brake Pedal Position Sensor. Signal Missing. Permanent Fault (B6284T; 1999-2001)
- ECM-9400: Brake Pedal Position Sensor. Signal Missing. Permanent Fault (B6294S; 2000-2001)
- ECM-9400: Brake Pedal Position Sensor. Signal Missing. Permanent Fault (B6304S3; 1999)
- ECM-9400: Brake Pedal Sensor. Faulty Signal (B5254T2; 2004)
- ECM-9400: Brake Pedal Sensor. Faulty Signal (B6294S2; B6294T; 2002-2004)
- ECM-9400: Brake Pedal Sensor. Signal Missing (B5254T2; 2004)
- ECM-9400: Brake Pedal Sensor. Signal Missing (B6294S2; B6294T; 2002-2004)
- ECM-9400: Brake Pedal Sensor. Signal Too High (B5254T2; 2004)
- ECM-9400: Brake Pedal Sensor. Signal Too High (B6294S2; B6294T; 2002-2004)
- ECM-940C: Accelerator Pedal (AP) Position Sensor, Analog Signal. Signal Too High (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-940D: Accelerator Pedal (AP) Position Sensor, Analog Signal. Signal Too Low (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-941C: Accelerator Pedal (AP) Position Sensor, Digital Signal. Signal Too High (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-941D: Accelerator Pedal (AP) Position Sensor, Digital Signal. Signal Too Low (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-951C: Engine Control Module (ECM), Idle Air Trim. Signal Too High (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-951D: Engine Control Module (ECM), Idle Air Trim. Signal Too Low (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-9520: Accelerator Pedal (AP) Position Sensor, Analog Signal. Faulty Signal (B5254T2; 2004)
- ECM-9520: Accelerator Pedal (AP) Position Sensor, Analog Signal. Faulty Signal (B6294S2; B6294T; 2002-2004)
- ECM-9520: Accelerator Pedal (AP) Position Sensor, Analog Signal. Signal Too High (B5254T2; 2004)
- ECM-9520: Accelerator Pedal (AP) Position Sensor, Analog Signal. Signal Too High (B6294S2; B6294T; 2002-2004)
- ECM-9520: Accelerator Pedal (AP) Position Sensor, Analog Signal. Signal Too Low (B5254T2; 2004)
- ECM-9520: Accelerator Pedal (AP) Position Sensor, Analog Signal. Signal Too Low (B6294S2; B6294T; 2002-2004)
- ECM-9520: Accelerator Pedal (AP) Position Sensor, Faulty Signal. Signal Too Low. Intermittent Fault (B6284T; 1999-2001)
- ECM-9520: Accelerator Pedal (AP) Position Sensor, Faulty Signal. Signal Too Low. Intermittent Fault (B6294S; 2000-2001)
- ECM-9520: Accelerator Pedal (AP) Position Sensor, Faulty Signal. Signal Too Low. Intermittent Fault (B6304S3; 1999)
- ECM-9520: Accelerator Pedal (AP) Position Sensor, Faulty Signal. Signal Too Low. Permanent Fault (B6284T; 1999-2001)
- ECM-9520: Accelerator Pedal (AP) Position Sensor, Faulty Signal. Signal Too Low. Permanent Fault (B6294S; 2000-2001)
- ECM-9520: Accelerator Pedal (AP) Position Sensor, Faulty Signal. Signal Too Low. Permanent Fault (B6304S3; 1999)
- ECM-9520: Accelerator Pedal (AP) Position Sensor. Faulty Signal. Intermittent Fault (B6284T; 1999-2001)
- ECM-9520: Accelerator Pedal (AP) Position Sensor. Faulty Signal. Intermittent Fault (B6294S; 2000-2001)
- ECM-9520: Accelerator Pedal (AP) Position Sensor. Faulty Signal. Intermittent Fault (B6304S3; 1999)
- ECM-9520: Accelerator Pedal (AP) Position Sensor. Faulty Signal. Permanent Fault (B6284T; 1999-2001)
- ECM-9520: Accelerator Pedal (AP) Position Sensor. Faulty Signal. Permanent Fault (B6294S; 2000-2001)
- ECM-9520: Accelerator Pedal (AP) Position Sensor. Faulty Signal. Permanent Fault (B6304S3; 1999)
- ECM-9530: Accelerator Pedal (AP) Position Sensor, Digital Signal. Signal Too High (B5254T2; 2004)
- ECM-9530: Accelerator Pedal (AP) Position Sensor, Digital Signal. Signal Too High (B6294S2; B6294T; 2002-2004)
- ECM-9530: Accelerator Pedal (AP) Position Sensor, Digital Signal. Signal Too Low (B5254T2; 2004)
- ECM-9530: Accelerator Pedal (AP) Position Sensor, Digital Signal. Signal Too Low (B6294S2; B6294T; 2002-2004)
- ECM-9530: Accelerator Pedal (AP) Position Sensor, Faulty Signal. Signal Too High. Intermittent Fault (B6284T; 1999-2001)
- ECM-9530: Accelerator Pedal (AP) Position Sensor, Faulty Signal. Signal Too High. Intermittent Fault (B6294S; 2000-2001)
- ECM-9530: Accelerator Pedal (AP) Position Sensor, Faulty Signal. Signal Too High. Intermittent Fault (B6304S3; 1999)
- ECM-9530: Accelerator Pedal (AP) Position Sensor, Faulty Signal. Signal Too High. Permanent Fault (B6284T; 1999-2001)
- ECM-9530: Accelerator Pedal (AP) Position Sensor, Faulty Signal. Signal Too High. Permanent Fault (B6294S; 2000-2001)
- ECM-9530: Accelerator Pedal (AP) Position Sensor, Faulty Signal. Signal Too High. Permanent Fault (B6304S3; 1999)
- ECM-9530: Accelerator Pedal (AP) Position Sensor, Faulty Signal. Signal Too Low. Intermittent Fault (B6284T; 1999-2001)
- ECM-9530: Accelerator Pedal (AP) Position Sensor, Faulty Signal. Signal Too Low. Intermittent Fault (B6294S; 2000-2001)
- ECM-9530: Accelerator Pedal (AP) Position Sensor, Faulty Signal. Signal Too Low. Intermittent Fault (B6304S3; 1999)
- ECM-9530: Accelerator Pedal (AP) Position Sensor, Faulty Signal. Signal Too Low. Permanent Fault (B6284T; 1999-2001)
- ECM-9530: Accelerator Pedal (AP) Position Sensor, Faulty Signal. Signal Too Low. Permanent Fault (B6294S; 2000-2001)
- ECM-9530: Accelerator Pedal (AP) Position Sensor, Faulty Signal. Signal Too Low. Permanent Fault (B6304S3; 1999)
- ECM-9540: Accelerator Pedal Sensor. Signal Too High. Intermittent Fault (B6284T; 1999-2001)
- ECM-9540: Accelerator Pedal Sensor. Signal Too High. Intermittent Fault (B6294S; 2000-2001)
- ECM-9540: Accelerator Pedal Sensor. Signal Too High. Intermittent Fault (B6304S3; 1999)
- ECM-9540: Accelerator Pedal Sensor. Signal Too High. Permanent Fault (B6284T; 1999-2001)
- ECM-9540: Accelerator Pedal Sensor. Signal Too High. Permanent Fault (B6294S; 2000-2001)
- ECM-9540: Accelerator Pedal Sensor. Signal Too High. Permanent Fault (B6304S3; 1999)
- ECM-9540: Accelerator Pedal Sensor. Signal Too Low. Intermittent Fault (B6284T; 1999-2001)
- ECM-9540: Accelerator Pedal Sensor. Signal Too Low. Intermittent Fault (B6294S; 2000-2001)
- ECM-9540: Accelerator Pedal Sensor. Signal Too Low. Intermittent Fault (B6304S3; 1999)
- ECM-9540: Accelerator Pedal Sensor. Signal Too Low. Permanent Fault (B6284T; 1999-2001)
- ECM-9540: Accelerator Pedal Sensor. Signal Too Low. Permanent Fault (B6294S; 2000-2001)
- ECM-9540: Accelerator Pedal Sensor. Signal Too Low. Permanent Fault (B6304S3; 1999)
- ECM-9540: Accelerator Pedal (AP) Position Sensor, Digital Signal. Faulty Signal (B5254T2; 2004)
- ECM-9540: Accelerator Pedal (AP) Position Sensor, Digital Signal. Faulty Signal (B6294S2; B6294T; 2002-2004)
- ECM-958F: Accelerator Pedal Sensor. Faulty Signal (B6284T; 1999-2001)
- ECM-958F: Accelerator Pedal Sensor. Faulty Signal (B6294S; 2000-2001)
- ECM-958F: Accelerator Pedal Sensor. Faulty Signal (B6304S3; 1999)
- ECM-959F: Accelerator Pedal Sensor. Faulty Signal (B6284T; 1999-2001)
Factory Service Tools
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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.
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