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.
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HOMESERVICE MANUALSVOLVO2003S80 T-6REPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROL MODULE (ECM) DIAGNOSTIC TROUBLE CODES - 8 OF 11
2003 Volvo S80 T-6
Engine Control Module (ECM) Diagnostic Trouble Codes - 8 Of 11
2003 Volvo S80 T-6SECTION Engine Control Module (ECM) Diagnostic Trouble Codes - 8 Of 11
- ECM-5200: Engine Speed (Rpm) Sensor. Faulty Signal (B5254T2; 2004)
- ECM-5200: Engine Speed (Rpm) Sensor. Faulty Signal (B6294S2; B6294T; 2002-2004)
- ECM-5200: Engine Speed (Rpm) Sensor. Signal Missing (B5254T2; 2004)
- ECM-5200: Engine Speed (Rpm) Sensor. Signal Missing (B6294S2; B6294T; 2002-2004)
- ECM-5200: Engine Speed (Rpm) Sensor. Signal Too High (B5254T2; 2004)
- ECM-5200: Engine Speed (Rpm) Sensor. Signal Too High (B6294S2; B6294T; 2002-2004)
- ECM-5200: Engine Speed (Rpm) Sensor. Signal Too Low (B5254T2; 2004)
- ECM-5200: Engine Speed (Rpm) Sensor. Signal Too Low (B6294S2; B6294T; 2002-2004)
- ECM-5200: Air Conditioning (A/C) Pressure Sensor. Faulty Signal (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-520B: Air Conditioning (A/C) Pressure Sensor. Signal Missing (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-520C: Air Conditioning (A/C) Pressure Sensor. Signal Too High (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-520D: Air Conditioning (A/C) Pressure Sensor. Signal Too Low (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-5300: Vehicle Speed Signal. Faulty Signal (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-530B: Control Module Communication (B5254T2; 2004)
- ECM-530B: Control Module Communication (B6284T; 1999-2001)
- ECM-530B: Control Module Communication (B6294S; 2000-2001)
- ECM-530B: Control Module Communication (B6294S2; B6294T; 2002-2004)
- ECM-530B: Control Module Communication (B6304S3; 1999)
- ECM-530B: Vehicle Speed Signal. Signal Missing (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-530C: Speed Signal. Signal Too High (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-530D: Diagnostic Trouble Code (DTC) In Another Control Module (B5254T2; 2004)
- ECM-530D: Diagnostic Trouble Code (DTC) In Another Control Module (B6284T; 1999-2001)
- ECM-530D: Diagnostic Trouble Code (DTC) In Another Control Module (B6294S; 2000-2001)
- ECM-530D: Diagnostic Trouble Code (DTC) In Another Control Module (B6294S2; B6294T; 2002-2004)
- ECM-530D: Diagnostic Trouble Code (DTC) In Another Control Module (B6304S3; 1999)
- ECM-530D: Speed Signal. Signal Too Low (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-531D: Control Module, Internal Fault (B5254T2; 2004)
- ECM-531D: Control Module, Internal Fault (B6284T; 1999-2001)
- ECM-531D: Control Module, Internal Fault (B6294S; 2000-2001)
- ECM-531D: Control Module, Internal Fault (B6294S2; B6294T; 2002-2004)
- ECM-531D: Control Module, Internal Fault (B6304S3; 1999)
- ECM-540B: Oil Grade, Level And Temperature Sensor. Faulty Signal (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-540C: Oil Grade, Level And Temperature Sensor. Signal Too High (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-540D: Oil Grade, Level And Temperature Sensor. Signal Too Low (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-5500: Oil Level. Faulty Signal (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-550D: Oil Level. Signal Too Low (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-6000: Air Conditioning (A/C) Relay Signal. Signal Missing. Intermittent Fault (B5254T2; 2004)
- ECM-6000: Air Conditioning (A/C) Relay Signal. Signal Missing. Intermittent Fault (B6284T; 1999-2001)
- ECM-6000: Air Conditioning (A/C) Relay Signal. Signal Missing. Intermittent Fault (B6294S; 2000-2001)
- ECM-6000: Air Conditioning (A/C) Relay Signal. Signal Missing. Intermittent Fault (B6294S2; B6294T; 2002-2004)
- ECM-6000: Air Conditioning (A/C) Relay Signal. Signal Missing. Intermittent Fault (B6304S3; 1999)
- ECM-6000: Air Conditioning (A/C) Relay Signal. Signal Missing. Permanent Fault (B5254T2; 2004)
- ECM-6000: Air Conditioning (A/C) Relay Signal. Signal Missing. Permanent Fault (B6284T; 1999-2001)
- ECM-6000: Air Conditioning (A/C) Relay Signal. Signal Missing. Permanent Fault (B6294S; 2000-2001)
- ECM-6000: Air Conditioning (A/C) Relay Signal. Signal Missing. Permanent Fault (B6294S2; B6294T; 2002-2004)
- ECM-6000: Air Conditioning (A/C) Relay Signal. Signal Missing. Permanent Fault (B6304S3; 1999)
- ECM-6000: Air Conditioning (A/C) Relay Signal. Signal Too High. Intermittent Fault (B5254T2; 2004)
- ECM-6000: Air Conditioning (A/C) Relay Signal. Signal Too High. Intermittent Fault (B6284T; 1999-2001)
- ECM-6000: Air Conditioning (A/C) Relay Signal. Signal Too High. Intermittent Fault (B6294S; 2000-2001)
- ECM-6000: Air Conditioning (A/C) Relay Signal. Signal Too High. Intermittent Fault (B6294S2; B6294T; 2002-2004)
- ECM-6000: Air Conditioning (A/C) Relay Signal. Signal Too High. Intermittent Fault (B6304S3; 1999)
- ECM-6000: Air Conditioning (A/C) Relay Signal. Signal Too High. Permanent Fault (B5254T2; 2004)
- ECM-6000: Air Conditioning (A/C) Relay Signal. Signal Too High. Permanent Fault (B6284T; 1999-2001)
- ECM-6000: Air Conditioning (A/C) Relay Signal. Signal Too High. Permanent Fault (B6294S; 2000-2001)
- ECM-6000: Air Conditioning (A/C) Relay Signal. Signal Too High. Permanent Fault (B6294S2; B6294T; 2002-2004)
- ECM-6000: Air Conditioning (A/C) Relay Signal. Signal Too High. Permanent Fault (B6304S3; 1999)
- ECM-6000: Air Conditioning (A/C) Relay Signal. Signal Too Low. Intermittent Fault (B5254T2; 2004)
- ECM-6000: Air Conditioning (A/C) Relay Signal. Signal Too Low. Intermittent Fault (B6284T; 1999-2001)
- ECM-6000: Air Conditioning (A/C) Relay Signal. Signal Too Low. Intermittent Fault (B6294S; 2000-2001)
- ECM-6000: Air Conditioning (A/C) Relay Signal. Signal Too Low. Intermittent Fault (B6294S2; B6294T; 2002-2004)
- ECM-6000: Air Conditioning (A/C) Relay Signal. Signal Too Low. Intermittent Fault (B6304S3; 1999)
- ECM-6000: Air Conditioning (A/C) Relay Signal. Signal Too Low. Permanent Fault (B5254T2; 2004)
- ECM-6000: Air Conditioning (A/C) Relay Signal. Signal Too Low. Permanent Fault (B6284T; 1999-2001)
- ECM-6000: Air Conditioning (A/C) Relay Signal. Signal Too Low. Permanent Fault (B6294S; 2000-2001)
- ECM-6000: Air Conditioning (A/C) Relay Signal. Signal Too Low. Permanent Fault (B6294S2; B6294T; 2002-2004)
- ECM-6000: Air Conditioning (A/C) Relay Signal. Signal Too Low. Permanent Fault (B6304S3; 1999)
- ECM-600B: Turbocharger (TC) Control Valve. Signal Missing. Intermittent Fault (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-600B: Turbocharger (TC) Control Valve. Signal Missing. Permanent Fault (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-600C: Turbocharger (TC) Control Valve. Signal Too High. Intermittent Fault (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-600C: Turbocharger (TC) Control Valve. Signal Too High. Permanent Fault (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-600D: Turbocharger (TC) Control Valve. Signal Too Low. Intermittent Fault (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-600D: Turbocharger (TC) Control Valve. Signal Too Low. Permanent Fault (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-601C: Turbocharger (TC) Control System, Boost Pressure Fault. Signal Too High (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-602D: Turbocharger (TC) Control System, Flow Fault. Signal Too Low (B5254T2; 2005-2006)
- ECM-602D: Turbocharger (TC) Control System, Flow Fault. Signal Too Low (B6294T; 2005-2006)
- ECM-6100: Engine Cooling Fan (FC) Control Module. Faulty Signal (B5254T2; B6294S2; B6294T; 2004)
- ECM-6100: Engine Cooling Fan (FC) Control Module. Signal Missing (B5254T2; B6294S2; B6294T; 2004)
- ECM-6100: Engine Cooling Fan (FC) Control Module. Signal Too High (B5254T2; B6294S2; B6294T; 2004)
- ECM-6100: Engine Cooling Fan (FC) Control Module. Signal Too Low (B5254T2; B6294S2; B6294T; 2004)
- ECM-6100: Engine Cooling Fan Control Module. Faulty Signal. Intermittent Fault (B6284T; 1999-2001)
- ECM-6100: Engine Cooling Fan Control Module. Faulty Signal. Intermittent Fault (B6294S; 2000-2001)
- ECM-6100: Engine Cooling Fan Control Module. Faulty Signal. Intermittent Fault (B6294S2; B6294T; 2002-2003)
- ECM-6100: Engine Cooling Fan Control Module. Faulty Signal. Intermittent Fault (B6304S3; 1999)
- ECM-6100: Engine Cooling Fan Control Module. Faulty Signal. Permanent Fault (B6284T; 1999-2001)
- ECM-6100: Engine Cooling Fan Control Module. Faulty Signal. Permanent Fault (B6294S; 2000-2001)
- ECM-6100: Engine Cooling Fan Control Module. Faulty Signal. Permanent Fault (B6294S2; B6294T; 2002-2003)
- ECM-6100: Engine Cooling Fan Control Module. Faulty Signal. Permanent Fault (B6304S3; 1999)
- ECM-6110: Camshaft Position Control, Intake. Slow (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-6110: Electric Cooling Fan Relay. No Signal. Intermittent Fault (B6284T; 1999-2001)
- ECM-6110: Electric Cooling Fan Relay. No Signal. Intermittent Fault (B6294S; 2000-2001)
- ECM-6110: Electric Cooling Fan Relay. No Signal. Intermittent Fault (B6294S2; B6294T; 2002-2003)
- ECM-6110: Electric Cooling Fan Relay. No Signal. Intermittent Fault (B6304S3; 1999)
- ECM-6110: Electric Cooling Fan Relay. No Signal. Permanent Fault (B6284T; 1999-2001)
- ECM-6110: Electric Cooling Fan Relay. No Signal. Permanent Fault (B6294S; 2000-2001)
- ECM-6110: Electric Cooling Fan Relay. No Signal. Permanent Fault (B6294S2; B6294T; 2002-2003)
- ECM-6110: Electric Cooling Fan Relay. No Signal. Permanent Fault (B6304S3; 1999)
- ECM-6110: Electric Cooling Fan Relay. Signal Too High. Intermittent Fault (B6284T; 1999-2001)
- ECM-6110: Electric Cooling Fan Relay. Signal Too High. Intermittent Fault (B6294S; 2000-2001)
- ECM-6110: Electric Cooling Fan Relay. Signal Too High. Intermittent Fault (B6294S2; B6294T; 2002-2003)
- ECM-6110: Electric Cooling Fan Relay. Signal Too High. Intermittent Fault (B6304S3; 1999)
- ECM-6110: Electric Cooling Fan Relay. Signal Too High. Permanent Fault (B6284T; 1999-2001)
- ECM-6110: Electric Cooling Fan Relay. Signal Too High. Permanent Fault (B6294S; 2000-2001)
- ECM-6110: Electric Cooling Fan Relay. Signal Too High. Permanent Fault (B6294S2; B6294T; 2002-2003)
- ECM-6110: Electric Cooling Fan Relay. Signal Too High. Permanent Fault (B6304S3; 1999)
- ECM-6110: Electric Cooling Fan Relay. Signal Too Low. Intermittent Fault (B6284T; 1999-2001)
- ECM-6110: Electric Cooling Fan Relay. Signal Too Low. Intermittent Fault (B6294S; 2000-2001)
- ECM-6110: Electric Cooling Fan Relay. Signal Too Low. Intermittent Fault (B6294S2; B6294T; 2002-2003)
- ECM-6110: Electric Cooling Fan Relay. Signal Too Low. Intermittent Fault (B6304S3; 1999)
- ECM-6110: Electric Cooling Fan Relay. Signal Too Low. Permanent Fault (B6284T; 1999-2001)
- ECM-6110: Electric Cooling Fan Relay. Signal Too Low. Permanent Fault (B6294S; 2000-2001)
- ECM-6110: Electric Cooling Fan Relay. Signal Too Low. Permanent Fault (B6294S2; B6294T; 2002-2003)
- ECM-6110: Electric Cooling Fan Relay. Signal Too Low. Permanent Fault (B6304S3; 1999)
- ECM-6110: Engine Cooling Fan (FC) Relay. Signal Missing (B5254T2; B6294S2; B6294T; 2004)
- ECM-6110: Engine Cooling Fan (FC) Relay. Signal Too High (B5254T2; B6294S2; B6294T; 2004)
- ECM-6110: Engine Cooling Fan (FC) Relay. Signal Too Low (B5254T2; B6294S2; B6294T; 2004)
- ECM-611B: Camshaft Control, Intake. Faulty (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-612B: Camshaft Reset Valve, Intake. Signal Missing (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-612C: Camshaft Reset Valve, Intake. Signal Too High (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-612D: Camshaft Reset Valve, Intake. Signal Too Low (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-6140: Camshaft Control, Exhaust. Slow (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-614B: Camshaft Control, Exhaust. Faulty (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-616B: Camshaft Reset Valve, Exhaust. Signal Missing (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-616C: Camshaft Reset Valve, Exhaust. Signal Too High (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-616D: Camshaft Reset Valve, Exhaust. Signal Too Low (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-6200: Engine Cooling Fan (FC) Control Module. Faulty Signal (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-620B: Engine Cooling Fan Control Module. Signal Too Low (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-620C: Engine Cooling Fan (FC) Control Module. Signal Too High (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-620D: Engine Cooling Fan (FC) Control Module. Signal Too Low (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-6220: Ecu-Box Cooling Fan. Signal Missing (B5254T2; 2004)
- ECM-6220: Ecu-Box Cooling Fan. Signal Missing (B6294S2; B6294T; 2002-2004)
- ECM-6220: Ecu-Box Cooling Fan. Signal Too High (B5254T2; 2004)
- ECM-6220: Ecu-Box Cooling Fan. Signal Too High (B6294S2; B6294T; 2002-2004)
- ECM-6220: Ecu-Box Cooling Fan. Signal Too Low (B5254T2; 2004)
- ECM-6220: Ecu-Box Cooling Fan. Signal Too Low (B6294S2; B6294T; 2002-2004)
- ECM-6220: Engine Cooling Fan (FC). Faulty Signal (B5254T2; 2006)
- ECM-630B: A/C Relay. Signal Missing. Intermittent Fault (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-630B: A/C Relay. Signal Missing. Permanent Fault (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-630C: A/C Relay. Signal Too High. Intermittent Fault (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-630C: A/C Relay. Signal Too High. Permanent Fault (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-630D: A/C Relay. Signal Too Low. Intermittent Fault (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-630D: A/C Relay. Signal Too Low. Permanent Fault (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-6400: Camshaft Reset Valve, Intake Signal Too High (B5254T2; 2004)
- ECM-6400: Camshaft Reset Valve, Intake Signal Too Low Or Signal Missing (B5254T2; 2004)
- ECM-6400: Camshaft Reset Valve, Intake Signal Too Low Or Signal Missing (B6294S2; B6294T; 2002-2004)
- ECM-640A: Camshaft Control, Intake. Faulty Signal (B5254T2; 2004)
- ECM-640A: Camshaft Control, Intake. Faulty Signal (B6294S2; B6294T; 2002-2004)
- ECM-640C: Turbocharger (TC) Control System. Signal Too High (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-640D: Turbocharger (TC) Control System. Signal Too Low (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-6410: Camshaft Reset Valve, Exhaust. Signal Too High (B5254T2; 2004)
- ECM-6410: Camshaft Reset Valve, Exhaust. Signal Too Low Or Signal Missing (B5254T2; 2004)
- ECM-6410: Camshaft Reset Valve, Exhaust. Signal Too Low Or Signal Missing (B6294T; 2002-2004)
- ECM-641A: Camshaft Control, Exhaust. Faulty Signal (B5254T2; 2004)
- ECM-641A: Camshaft Control, Exhaust. Faulty Signal (B6294T; 2002-2004)
- ECM-643A: Camshaft Position, Intake. Signal Too High (B5254T2; 2004)
- ECM-643A: Camshaft Position, Intake. Signal Too High (B6294S2; B6294T; 2002-2004)
- ECM-643A: Camshaft Position, Intake. Signal Too Low (B5254T2; 2004)
- ECM-643A: Camshaft Position, Intake. Signal Too Low (B6294S2; B6294T; 2002-2004)
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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.