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 - 7 OF 11
2003 Volvo S80 T-6
Engine Control Module (ECM) Diagnostic Trouble Codes - 7 Of 11
2003 Volvo S80 T-6SECTION Engine Control Module (ECM) Diagnostic Trouble Codes - 7 Of 11
- ECM-405C, Fuel Level Sensor (B5254T2; 2004)
- ECM-405C, Fuel Level Sensor (B6294S2; B6294T; 2002-2004)
- ECM-406C: Fuel Tank System, Leakage. Fuel Tank Filler Cap Missing (B5254T2; 2004)
- ECM-406C: Fuel Tank System, Leakage. Fuel Tank Filler Cap Missing (B6294S2; B6294T; 2003-2004)
- ECM-420C: Evaporative Emission System (EVAP) Valve. Open (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-420D: Evaporative Emission System (EVAP). Closed (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-421B: Canister Purge (Cp) Valve. Signal Missing (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-421C: Evaporative Emission System (EVAP) Valve. Signal Too High (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-421D: Evaporative Emission System (EVAP) Valve. Signal Too Low (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-4308: Leak Diagnostic. Large Leak (B6284T; B6294S; 2000-2001)
- ECM-4308: Leak Diagnostic. Major Leak. Permanent Fault (B6284T; B6304S3; 1999)
- ECM-430C: Fuel Tank System, Leakage. Fuel Tank Filler Cap Missing (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-430C: Leak Diagnostic. Smallest Leak (B6284T; B6294S; 2000-2001)
- ECM-430D: Leak Diagnostic. Minor Leak. Intermittent Fault (B6284T; B6304S3; 1999)
- ECM-430D: Leak Diagnostic. Minor Leak. Permanent Fault (B6284T; B6304S3; 1999)
- Diagnostic trouble code (DTC) information
- Minor leak. Permanent fault
- Notes
- Safety
- Checking cables and terminals
- General about fuel tank system test
- Checking engine coolant temperature (ECT)
- Start the fuel tank system test
- Test pressurization of the fuel tank system
- Checking hose to EVAP canister shut-off valve
- Replacing component
- Checking fuel tank pressure sensor hose
- Checking fuel tank system
- Verification
- Information
- Replacing fuel tank pressure sensor
- Replacing the EVAP canister shut-off valve
- ECM-430D: Leak Diagnostic. Small Leak (B6284T; B6294S; 2000-2001)
- ECM-431B: Leak Diagnostic Unit, Preheating. Signal Missing (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-431C: Leak Diagnostic Unit, Preheating. Signal Too High (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-431D: Leak Diagnostic Unit, Preheating. Signal Too Low (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-431D: Leak Diagnostic Unit. Faulty Signal (B5254T2; 2004)
- ECM-431D: Leak Diagnostic Unit. Faulty Signal (B6294S2; B6294T; 2003-2004)
- ECM-431D: Leak Diagnostic Unit. Faulty Signal (B6294S2; B6294T; 2002)
- ECM-431D: Leak Diagnostic Unit. Signal Missing (B5254T2; 2004)
- ECM-431D: Leak Diagnostic Unit. Signal Missing (B6294S2; B6294T; 2002)
- ECM-431D: Leak Diagnostic Unit. Signal Missing (B6294S2; B6294T; 2003-2004)
- ECM-431D: Leak Diagnostic Unit. Signal Too High (B5254T2; 2004)
- ECM-431D: Leak Diagnostic Unit. Signal Too High (B6294S2; B6294T; 2002)
- ECM-431D: Leak Diagnostic Unit. Signal Too High (B6294S2; B6294T; 2003-2004)
- ECM-431D: Leak Diagnostic Unit. Signal Too Low (B5254T2; 2004)
- ECM-431D: Leak Diagnostic Unit. Signal Too Low (B6294S2; B6294T; 2002)
- ECM-431D: Leak Diagnostic Unit. Signal Too Low (B6294S2; B6294T; 2003-2004)
- ECM-432B: Leak Diagnostic Unit, Valve. Signal Missing (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-432C: Leak Diagnostic Unit, Preheating. Signal Too High (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-432D: Leak Diagnostic Unit, Preheating. Signal Too Low (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-4338: Fuel Tank Filler Cap Missing (B5254T2; 2004)
- ECM-4338: Fuel Tank Filler Cap Missing (B6284T; 1999-2001)
- ECM-4338: Fuel Tank Filler Cap Missing (B6294S; 2000-2001)
- ECM-4338: Fuel Tank Filler Cap Missing (B6294S2; B6294T; 2002-2004)
- ECM-4338: Fuel Tank Filler Cap Missing (B6304S3; 1999)
- ECM-433B: Leak Diagnostic Unit, Pump. Signal Missing (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-433C: Leak Diagnostic Unit, Pump. Signal Too High (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-433D: Leak Diagnostic Unit, Pump. Signal Too Low (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-434C: Fuel Tank System, Leakage. Minor Leak (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-4360: Leak Diagnostic Unit. Faulty Signal (B5254T2; 2005-2006)
- ECM-4360: Leak Diagnostic Unit. Faulty Signal (B6294S2; B6294T; 2005-2006)
- ECM-436B: Leak Diagnostic Unit. Signal Missing (B5254T2; 2005-2006)
- ECM-436B: Leak Diagnostic Unit. Signal Missing (B6294S2; B6294T; 2005-2006)
- ECM-436C: Leak Diagnostic Unit. Signal Too High (B5254T2; 2005-2006)
- ECM-436C: Leak Diagnostic Unit. Signal Too High (B6294S2; B6294T; 2005-2006)
- ECM-436D: Leak Diagnostic Unit. Signal Too Low (B5254T2; 2005-2006)
- ECM-436D: Leak Diagnostic Unit. Signal Too Low (B6294S2; B6294T; 2005-2006)
- ECM-4380: Fuel Tank Filler Cap. Missing (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-439C: Fuel Tank System, Leakage. Major Leak (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-4400: Fuel Level Sensor. Faulty Signal (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-440B: Fuel Level Sensor. Signal Missing (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-440C: Fuel Level Sensor. Signal Too High (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-440D: Fuel Level Sensor. Signal Too Low (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-4420: Fuel Level Sensor. Faulty Signal (B5254T2; 2006)
- ECM-443B: Fuel Level Sensor. Signal Too Low (B5254T2; 2006)
- ECM-443C: Fuel Level Sensor. Signal Too High (B5254T2; 2006)
- ECM-443D: Fuel Level Sensor. Signal Missing (B5254T2; 2006)
- ECM-4801: Three-Way Catalytic Converter (TWC) Efficiency, Bank 1. Intermittent Fault (B6284T; 1999-2001)
- ECM-4801: Three-Way Catalytic Converter (TWC) Efficiency, Bank 1. Intermittent Fault (B6294S; 2000-2001)
- ECM-4801: Three-Way Catalytic Converter (TWC) Efficiency, Bank 1. Intermittent Fault (B6294S2; B6294T; 2002-2004)
- ECM-4801: Three-Way Catalytic Converter (TWC) Efficiency, Bank 1. Intermittent Fault (B6304S3; 1999)
- ECM-4801: Three-Way Catalytic Converter (TWC) Efficiency, Bank 1. Permanent Fault (B6284T; 1999-2001)
- ECM-4801: Three-Way Catalytic Converter (TWC) Efficiency, Bank 1. Permanent Fault (B6294S; 2000-2001)
- ECM-4801: Three-Way Catalytic Converter (TWC) Efficiency, Bank 1. Permanent Fault (B6294S2; B6294T; 2002-2004)
- ECM-4801: Three-Way Catalytic Converter (TWC) Efficiency, Bank 1. Permanent Fault (B6304S3; 1999)
- ECM-4801: Three-Way Catalytic Converter (TWC) Efficiency. Intermittent Fault (B5254T2; 2004)
- ECM-4801: Three-Way Catalytic Converter (TWC) Efficiency. Permanent Fault (B5254T2; 2004)
- ECM-4901: Three-Way Catalytic Converter (TWC) Efficiency, Bank 2. Intermittent Fault (B6284T; 1999-2001)
- ECM-4901: Three-Way Catalytic Converter (TWC) Efficiency, Bank 2. Intermittent Fault (B6294S; 2000-2001)
- ECM-4901: Three-Way Catalytic Converter (TWC) Efficiency, Bank 2. Intermittent Fault (B6294S2; B6294T; 2002-2004)
- ECM-4901: Three-Way Catalytic Converter (TWC) Efficiency, Bank 2. Intermittent Fault (B6304S3; 1999)
- ECM-4901: Three-Way Catalytic Converter (TWC) Efficiency, Bank 2. Permanent Fault (B6284T; 1999-2001)
- ECM-4901: Three-Way Catalytic Converter (TWC) Efficiency, Bank 2. Permanent Fault (B6294S; 2000-2001)
- ECM-4901: Three-Way Catalytic Converter (TWC) Efficiency, Bank 2. Permanent Fault (B6294S2; B6294T; 2002-2004)
- ECM-4901: Three-Way Catalytic Converter (TWC) Efficiency, Bank 2. Permanent Fault (B6304S3; 1999)
- ECM-5000: Air Conditioning (A/C) Pressure Sensor. Signal Missing. Intermittent Fault (B5254T2; 2004)
- ECM-5000: Air Conditioning (A/C) Pressure Sensor. Signal Missing. Intermittent Fault (B6284T; 1999-2001)
- ECM-5000: Air Conditioning (A/C) Pressure Sensor. Signal Missing. Intermittent Fault (B6294S; 2000-2001)
- ECM-5000: Air Conditioning (A/C) Pressure Sensor. Signal Missing. Intermittent Fault (B6294S2; B6294T; 2002-2004)
- ECM-5000: Air Conditioning (A/C) Pressure Sensor. Signal Missing. Intermittent Fault (B6304S3; 1999)
- ECM-5000: Air Conditioning (A/C) Pressure Sensor. Signal Missing. Permanent Fault (B5254T2; 2004)
- ECM-5000: Air Conditioning (A/C) Pressure Sensor. Signal Missing. Permanent Fault (B6284T; 1999-2001)
- ECM-5000: Air Conditioning (A/C) Pressure Sensor. Signal Missing. Permanent Fault (B6294S; 2000-2001)
- ECM-5000: Air Conditioning (A/C) Pressure Sensor. Signal Missing. Permanent Fault (B6294S2; B6294T; 2002-2004)
- ECM-5000: Air Conditioning (A/C) Pressure Sensor. Signal Missing. Permanent Fault (B6304S3; 1999)
- ECM-5000: Air Conditioning (A/C) Pressure Sensor. Signal Too High. Intermittent Fault (B5254T2; 2004)
- ECM-5000: Air Conditioning (A/C) Pressure Sensor. Signal Too High. Intermittent Fault (B6284T; 1999-2001)
- ECM-5000: Air Conditioning (A/C) Pressure Sensor. Signal Too High. Intermittent Fault (B6294S; 2000-2001)
- ECM-5000: Air Conditioning (A/C) Pressure Sensor. Signal Too High. Intermittent Fault (B6294S2; B6294T; 2002-2004)
- ECM-5000: Air Conditioning (A/C) Pressure Sensor. Signal Too High. Intermittent Fault (B6304S3; 1999)
- ECM-5000: Air Conditioning (A/C) Pressure Sensor. Signal Too High. Permanent Fault (B5254T2; 2004)
- ECM-5000: Air Conditioning (A/C) Pressure Sensor. Signal Too High. Permanent Fault (B6284T; 1999-2001)
- ECM-5000: Air Conditioning (A/C) Pressure Sensor. Signal Too High. Permanent Fault (B6294S; 2000-2001)
- ECM-5000: Air Conditioning (A/C) Pressure Sensor. Signal Too High. Permanent Fault (B6294S2; B6294T; 2002-2004)
- ECM-5000: Air Conditioning (A/C) Pressure Sensor. Signal Too High. Permanent Fault (B6304S3; 1999)
- ECM-5000: Air Conditioning (A/C) Pressure Sensor. Signal Too Low. Intermittent Fault (B5254T2; 2004)
- ECM-5000: Air Conditioning (A/C) Pressure Sensor. Signal Too Low. Intermittent Fault (B6284T; 1999-2001)
- ECM-5000: Air Conditioning (A/C) Pressure Sensor. Signal Too Low. Intermittent Fault (B6294S; 2000-2001)
- ECM-5000: Air Conditioning (A/C) Pressure Sensor. Signal Too Low. Intermittent Fault (B6294S2; B6294T; 2002-2004)
- ECM-5000: Air Conditioning (A/C) Pressure Sensor. Signal Too Low. Intermittent Fault (B6304S3; 1999)
- ECM-5000: Air Conditioning (A/C) Pressure Sensor. Signal Too Low. Permanent Fault (B5254T2; 2004)
- ECM-5000: Air Conditioning (A/C) Pressure Sensor. Signal Too Low. Permanent Fault (B6284T; 1999-2001)
- ECM-5000: Air Conditioning (A/C) Pressure Sensor. Signal Too Low. Permanent Fault (B6294S; 2000-2001)
- ECM-5000: Air Conditioning (A/C) Pressure Sensor. Signal Too Low. Permanent Fault (B6294S2; B6294T; 2002-2004)
- ECM-5000: Air Conditioning (A/C) Pressure Sensor. Signal Too Low. Permanent Fault (B6304S3; 1999)
- ECM-5000: Engine Speed (Rpm) Sensor Signal. Faulty Signal (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-500B: Engine Speed (Rpm) Sensor Signal. Signal Missing (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-500C: Engine Speed (Rpm) Sensor Signal. Signal Too High (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-500D: Engine Speed (Rpm) Sensor Signal. Signal Too Low (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-5100: Malfunction Indicator Lamp (Mil), TCM. Faulty Signal (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-510F: Vehicle Speed Signal (B5254T2; 2004)
- ECM-510F: Vehicle Speed Signal (B6284T; 1999-2001)
- ECM-510F: Vehicle Speed Signal (B6294S; 2000-2001)
- ECM-510F: Vehicle Speed Signal (B6294S2; B6294T; 2002-2004)
- ECM-510F: Vehicle Speed Signal (B6304S3; 1999)
- ECM-5110: Malfunction Indicator Lamp (Mil), CEM. Faulty Signal (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-512B: Malfunction Indicator Lamp (Mil) Communication. Signal Missing (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-5130: Malfunction Indicator Lamp (Mil) Control Module Transmission (TCM). Faulty Signal (B5254T2; B6294S2; B6294T; 2005-2006)
- ECM-513B: Malfunction Indicator Lamp (Mil), Transmission Control Module (TCM). Signal Missing (B5254T2; B6294S2; B6294T; 2005-2006)
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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.