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 XC70FACTORY OEM SERVICE PROCEDURE
Engine Control Module (ECM) Diagnostic Trouble Codes (XC) - 2 Of 9
- ECM-222C: Rear Heated Oxygen Sensor (Ho2S), Bank 1. Signal Too High (B5254T2; 2005-07)
- ECM-222D: Rear Heated Oxygen Sensor (Ho2S), Bank 1. Signal Too Low (B5254T2; 2005-2007)
- ECM-223B: Rear Heated Oxygen Sensor (Ho2S), Bank 1. Signal Missing (B5254T2; 2005-2007)
- ECM-223C: Rear Heated Oxygen Sensor (Ho2S), Bank 1. Signal Too High (B5254T2; 2005-2007)
- ECM-223D: Rear Heated Oxygen Sensor (Ho2S), Bank 1. Signal Too Low (B5254T2; 2005-2007)
- ECM-2240: Rear Heated Oxygen Sensors (Ho2S), Switched. Faulty Signal (B5254T2; 2005-2006)
- ECM-2310: Injector 1. Signal Missing. Intermittent Fault (B5244T3; 2001-2002)
- ECM-2310: Injector 1. Signal Missing. Intermittent Fault (B5254T2; 2003-2004)
- ECM-2310: Injector 1. Signal Missing. Permanent Fault (B5244T3; 2001-2002)
- ECM-2310: Injector 1. Signal Missing. Permanent Fault (B5254T2; 2003-2004)
- ECM-2310: Injector 1. Signal To High. Intermittent Fault (B5244T3; 2001-2002)
- ECM-2310: Injector 1. Signal To High. Intermittent Fault (B5254T2; 2003-2004)
- ECM-2310: Injector 1. Signal To High. Permanent Fault (B5244T3; 2001-2002)
- ECM-2310: Injector 1. Signal To High. Permanent Fault (B5254T2; 2003-2004)
- ECM-2310: Injector 1. Signal To Low. Intermittent Fault (B5244T3; 2001-2002)
- ECM-2310: Injector 1. Signal To Low. Intermittent Fault (B5254T2; 2003-2004)
- ECM-2310: Injector 1. Signal To Low. Permanent Fault (B5244T3; 2001-2002)
- ECM-2310: Injector 1. Signal To Low. Permanent Fault (B5254T2; 2003-2004)
- ECM-2320: Injector 2. Signal Missing. Intermittent Fault (B5244T3; 2001-2002)
- ECM-2320: Injector 2. Signal Missing. Intermittent Fault (B5254T2; 2003-2004)
- ECM-2320: Injector 2. Signal Missing. Permanent Fault (B5244T3; 2001-2002)
- ECM-2320: Injector 2. Signal Missing. Permanent Fault (B5254T2; 2003-2004)
- ECM-2320: Injector 2. Signal To High. Intermittent Fault (B5244T3; 2001-2002)
- ECM-2320: Injector 2. Signal To High. Intermittent Fault (B5254T2; 2003-2004)
- ECM-2320: Injector 2. Signal To High. Permanent Fault (B5244T3; 2001-2002)
- ECM-2320: Injector 2. Signal To High. Permanent Fault (B5254T2; 2003-2004)
- ECM-2320: Injector 2. Signal To Low. Intermittent Fault (B5244T3; 2001-2002)
- ECM-2320: Injector 2. Signal To Low. Intermittent Fault (B5254T2; 2003-2004)
- ECM-2320: Injector 2. Signal To Low. Permanent Fault (B5244T3; 2001-2002)
- ECM-2320: Injector 2. Signal To Low. Permanent Fault (B5254T2; 2003-2004)
- ECM-2330: Injector 3. Signal Missing. Intermittent Fault (B5244T3; 2001-2002)
- ECM-2330: Injector 3. Signal Missing. Intermittent Fault (B5254T2; 2003-2004)
- ECM-2330: Injector 3. Signal Missing. Permanent Fault (B5244T3; 2001-2002)
- ECM-2330: Injector 3. Signal Missing. Permanent Fault (B5254T2; 2003-2004)
- ECM-2330: Injector 3. Signal To High. Intermittent Fault (B5244T3; 2001-2002)
- ECM-2330: Injector 3. Signal To High. Intermittent Fault (B5254T2; 2003-2004)
- ECM-2330: Injector 3. Signal To High. Permanent Fault (B5244T3; 2001-2002)
- ECM-2330: Injector 3. Signal To High. Permanent Fault (B5254T2; 2003-2004)
- ECM-2330: Injector 3. Signal To Low. Intermittent Fault (B5244T3; 2001-2002)
- ECM-2330: Injector 3. Signal To Low. Intermittent Fault (B5254T2; 2003-2004)
- ECM-2330: Injector 3. Signal To Low. Permanent Fault (B5244T3; 2001-2002)
- ECM-2330: Injector 3. Signal To Low. Permanent Fault (B5254T2; 2003-2004)
- ECM-2340: Injector 4. Signal Missing. Intermittent Fault (B5244T3; 2001-2002)
- ECM-2340: Injector 4. Signal Missing. Intermittent Fault (B5254T2; 2003-2004)
- ECM-2340: Injector 4. Signal Missing. Permanent Fault (B5244T3; 2001-2002)
- ECM-2340: Injector 4. Signal Missing. Permanent Fault (B5254T2; 2003-2004)
- ECM-2340: Injector 4. Signal To High. Intermittent Fault (B5244T3; 2001-2002)
- ECM-2340: Injector 4. Signal To High. Intermittent Fault (B5254T2; 2003-2004)
- ECM-2340: Injector 4. Signal To High. Permanent Fault (B5244T3; 2001-2002)
- ECM-2340: Injector 4. Signal To High. Permanent Fault (B5254T2; 2003-2004)
- ECM-2340: Injector 4. Signal To Low. Intermittent Fault (B5244T3; 2001-2002)
- ECM-2340: Injector 4. Signal To Low. Intermittent Fault (B5254T2; 2003-2004)
- ECM-2340: Injector 4. Signal To Low. Permanent Fault (B5244T3; 2001-2002)
- ECM-2340: Injector 4. Signal To Low. Permanent Fault (B5254T2; 2003-2004)
- ECM-2350: Injector 5. Signal Missing. Intermittent Fault (B5244T3; 2001-2002)
- ECM-2350: Injector 5. Signal Missing. Intermittent Fault (B5254T2; 2003-2004)
- ECM-2350: Injector 5. Signal Missing. Permanent Fault (B5244T3; 2001-2002)
- ECM-2350: Injector 5. Signal Missing. Permanent Fault (B5254T2; 2003-2004)
- ECM-2350: Injector 5. Signal To High. Intermittent Fault (B5244T3; 2001-2002)
- ECM-2350: Injector 5. Signal To High. Intermittent Fault (B5254T2; 2003-2004)
- ECM-2350: Injector 5. Signal To High. Permanent Fault (B5244T3; 2001-2002)
- ECM-2350: Injector 5. Signal To High. Permanent Fault (B5254T2; 2003-2004)
- ECM-2350: Injector 5. Signal To Low. Intermittent Fault (B5244T3; 2001-2002)
- ECM-2350: Injector 5. Signal To Low. Intermittent Fault (B5254T2; 2003-2004)
- ECM-2350: Injector 5. Signal To Low. Permanent Fault (B5244T3; 2001-2002)
- ECM-2350: Injector 5. Signal To Low. Permanent Fault (B5254T2; 2003-2004)
- ECM-2400: Front Heated Oxygen Sensor (Ho2S), Bank 1, Heating. Faulty Signal (B5254T2; 2005-2007)
- ECM-2400: Fuel Pump (FP) Relay. Signal Missing. Intermittent Fault (B5244T3; 2002)
- ECM-2400: Fuel Pump (FP) Relay. Signal Missing. Intermittent Fault (B5254T2; 2003-2004)
- ECM-2400: Fuel Pump (FP) Relay. Signal Missing. Permanent Fault (B5244T3; 2002)
- ECM-2400: Fuel Pump (FP) Relay. Signal Missing. Permanent Fault (B5254T2; 2003-2004)
- ECM-2400: Fuel Pump (FP) Relay. Signal Too High. Intermittent Fault (B5244T3; 2001)
- ECM-2400: Fuel Pump (FP) Relay. Signal Too High. Intermittent Fault (B5244T3; 2002)
- ECM-2400: Fuel Pump (FP) Relay. Signal Too High. Intermittent Fault (B5254T2; 2003-2004)
- ECM-2400: Fuel Pump (FP) Relay. Signal Too High. Permanent Fault (B5244T3; 2001)
- ECM-2400: Fuel Pump (FP) Relay. Signal Too High. Permanent Fault (B5244T3; 2002)
- ECM-2400: Fuel Pump (FP) Relay. Signal Too High. Permanent Fault (B5254T2; 2003-2004)
- ECM-2400: Fuel Pump (FP) Relay. Signal Too Low. Intermittent Fault (B5244T3; 2002)
- ECM-2400: Fuel Pump (FP) Relay. Signal Too Low. Intermittent Fault (B5244T3; 2001)
- ECM-2400: Fuel Pump (FP) Relay. Signal Too Low. Intermittent Fault (B5254T2; 2003-2004)
- ECM-2400: Fuel Pump (FP) Relay. Signal Too Low. Permanent Fault (B5244T3; 2002)
- ECM-2400: Fuel Pump (FP) Relay. Signal Too Low. Permanent Fault (B5244T3; 2001)
- ECM-2400: Fuel Pump (FP) Relay. Signal Too Low. Permanent Fault (B5254T2; 2003-2004)
- ECM-240B: Front Heated Oxygen Sensor (Ho2S), Bank 1, Heating. Signal Missing (B5254T2; 2005-2007)
- ECM-240C: Front Heated Oxygen Sensor (Ho2S), Bank 1, Heating. Signal Too High (B5254T2; 2005-2007)
- ECM-242D: Front Heated Oxygen Sensor (Ho2S), Bank 1. Signal Too Low (B5254T2; 2005-2007)
- ECM-243B: Front Heated Oxygen Sensor (Ho2S), Bank 1. Signal Missing (B5254T2; 2005-2007)
- ECM-243C: Front Heated Oxygen Sensor (Ho2S), Bank 1 Heating. Signal Too High (B5254T2; 2006-2007)
- ECM-244B: Front Heated Oxygen Sensor (Ho2S), Bank 1, Heating. Signal Missing (B5254T2; 2005-2007)
- ECM-244C: Front Heated Oxygen Sensor (Ho2S), Bank 1, Heating. Signal Too High (B5254T2; 2005-2007)
- ECM-244D: Front Heated Oxygen Sensor (Ho2S), Bank 1, Heating. Signal Too Low (B5254T2; 2005-2007)
- ECM-2450: Front Heated Oxygen Sensor (Ho2S), Bank 1. Faulty Signal (B5254T2; 2005-2007)
- ECM-245B: Front Heated Oxygen Sensor (Ho2S), Bank 1. Signal Missing (B5254T2; 2005-2007)
- ECM-245C: Front Heated Oxygen Sensor (Ho2S), Bank 1. Signal Too High (B5254T2; 2005-2007)
- ECM-245D: Front Heated Oxygen Sensor (Ho2S), Bank 1. Signal Too Low (B5254T2; 2005-2007)
- ECM-246B: Front Heated Oxygen Sensor (Ho2S), Bank 1. Signal Missing (B5254T2; 2005-2007)
- ECM-2470: Front Heated Oxygen Sensor (Ho2S), Bank 1. Faulty Signal (B5254T2; 2005-2007)
- ECM-247B: Front Heated Oxygen Sensor (Ho2S), Bank 1. Signal Missing (B5254T2; 2005-2007)
- ECM-247C: Front Heated Oxygen Sensor (Ho2S), Bank 1. Signal Too High (B5254T2; 2005-2007)
- ECM-248C: Front Heated Oxygen Sensor (Ho2S), Bank 1. Signal Too High (B5254T2; 2005-2007)
- ECM-248D: Front Heated Oxygen Sensor (Ho2S), Bank 1. Signal Too Low (B5254T2; 2005-2007)
- ECM-249B: Front Heated Oxygen Sensor (Ho2S), Bank 1. Signal Missing (B5254T2; 2005-2007)
- ECM-24A0: Switched Front Heated Oxygen Sensors (Ho2S). Faulty Signal (B5254T2; 2005-2006)
- ECM-24AB: Front Heated Oxygen Sensor (Ho2S), Bank 1. Signal Missing (B5254T2; 2005-2007)
- ECM-24B0: Front Heated Oxygen Sensor (Ho2S), Bank 1. Faulty Signal (B5254T2; 2005-2007)
- ECM-24BB: Front Heated Oxygen Sensor (Ho2S), Bank 1. Signal Missing (B5254T2; 2005-2007)
- ECM-24BC: Front Heated Oxygen Sensor (Ho2S), Bank 1. Signal Too High (B5254T2; 2005-2007)
- ECM-24BD: Front Heated Oxygen Sensor (Ho2S), Bank 1. Signal Too Low (B5254T2; 2005-2007)
- ECM-24C0: Front Heated Oxygen Sensor (Ho2S), Bank 1. Faulty Signal (B5254T2; 2005-2007)
- ECM-260A: Long-Term Fuel Trim. Lower Limit (B5244T3; 2001-2002)
- ECM-260A: Long-Term Fuel Trim. Lower Limit (B5254T2; 2003-2004)
- ECM-260A: Long-Term Fuel Trim. Upper Limit (B5244T3; 2001-2002)
- Diagnostic trouble code (DTC) information
- Upper limit
- ECM-260A: Long-Term Fuel Trim. Upper Limit (B5254T2; 2003-2004)
- ECM-261A: Long-Term Fuel Trim. Lower Limit (B5244T3; 2001-2002)
- ECM-261A: Long-Term Fuel Trim. Lower Limit (B5254T2; 2003-2004)
- ECM-261A: Long-Term Fuel Trim. Upper Limit (B5244T3; 2001-2002)
- ECM-261A: Long-Term Fuel Trim. Upper Limit (B5254T2; 2003-2004)
- ECM-262A: Long-Term Fuel Trim. Lower Limit (B5244T3; 2001-2002)
- ECM-262A: Long-Term Fuel Trim. Lower Limit (B5254T2; 2003-2004)
- ECM-262A: Long-Term Fuel Trim. Upper Limit (B5244T3; 2001-2002)
- ECM-262A: Long-Term Fuel Trim. Upper Limit (B5254T2; 2003-2004)
- ECM-268A: Long-Term Fuel Trim. Faulty Signal (B5244T3; 2001-2002)
- ECM-268A: Long-Term Fuel Trim. Faulty Signal (B5254T2; 2003-2004)
- ECM-268A: Long-Term Fuel Trim. Lower Limit (B5244T3; 2001-2002)
- ECM-268A: Long-Term Fuel Trim. Lower Limit (B5254T2; 2003-2004)
- ECM-268A: Long-Term Fuel Trim. Upper Limit (B5244T3; 2001-2002)
- ECM-268A: Long-Term Fuel Trim. Upper Limit (B5254T2; 2003-2004)
- ECM-2720: Engine Coolant Temperature (ECT) Sensor. Faulty Signal (B5254T2; 2005)
- ECM-272D: Engine Coolant Temperature (ECT) Sensor. Signal Too Low (B5254T2; 2005)
- ECM-273C: Engine Coolant Temperature (ECT) Sensor. Signal Too High (B5254T2; 2005)
- ECM-273C: Engine Coolant Temperature (ECT) Sensor. Signal Too High (B5254T2; 2007)
- ECM-273D: Engine Coolant Temperature (ECT) Sensor. Signal Too Low (B5254T2; 2005-2007)
- ECM-2740: Engine Coolant Temperature (ECT) Sensor. Faulty Signal (B5254T2; 2006-2007)
- ECM-274C: Engine Coolant Temperature (ECT) Sensor. Signal Too High (B5254T2; 2006-2007)
- ECM-274D: Engine Coolant Temperature (ECT) Sensor. Signal Too Low (B5254T2; 2005-2007)
- ECM-275C: Engine Coolant Temperature (ECT) Sensor. Signal Too High (B5254T2; 2006-2007)
- ECM-275D: Engine Coolant Temperature (ECT) Sensor. Signal Too Low (B5254T2; 2006-2007)
- ECM-2800: Fuel Pressure Sensor. Signal Too Low (B5254T2; 2005-2007)
- ECM-280A: Front Heated Oxygen Sensor (Ho2S), Bank 1. Faulty Signal. Intermittent Fault (B5244T3; 2001-2002)
- ECM-280A: Front Heated Oxygen Sensor (Ho2S), Bank 1. Faulty Signal. Intermittent Fault (B5254T2; 2003-2004)
- ECM-280A: Front Heated Oxygen Sensor (Ho2S), Bank 1. Faulty Signal. Permanent Fault (B5244T3; 2001-2002)
- ECM-280A: Front Heated Oxygen Sensor (Ho2S), Bank 1. Faulty Signal. Permanent Fault (B5254T2; 2003-2004)
- ECM-280A: Front Heated Oxygen Sensor (Ho2S), Bank 1. Signal Missing. Intermittent Fault (B5244T3; 2001-2002)
- ECM-280A: Front Heated Oxygen Sensor (Ho2S), Bank 1. Signal Missing. Intermittent Fault (B5254T2; 2003-2004)
- ECM-280A: Front Heated Oxygen Sensor (Ho2S), Bank 1. Signal Missing. Permanent Fault (B5244T3; 2001-2002)
- ECM-280A: Front Heated Oxygen Sensor (Ho2S), Bank 1. Signal Missing. Permanent Fault (B5254T2; 2003-2004)
- ECM-280A: Front Heated Oxygen Sensor (Ho2S), Bank 1. Signal Too High. Intermittent Fault (B5244T3; 2001-2002)
- ECM-280A: Front Heated Oxygen Sensor (Ho2S), Bank 1. Signal Too High. Intermittent Fault (B5254T2; 2003-2004)
- ECM-280A: Front Heated Oxygen Sensor (Ho2S), Bank 1. Signal Too High. Permanent Fault (B5244T3; 2001-2002)
- ECM-280A: Front Heated Oxygen Sensor (Ho2S), Bank 1. Signal Too High. Permanent Fault (B5254T2; 2003-2004)
- ECM-280A: Front Heated Oxygen Sensor (Ho2S), Bank 1. Signal Too Low. Intermittent Fault (B5244T3; 2001-2002)
- ECM-280A: Front Heated Oxygen Sensor (Ho2S), Bank 1. Signal Too Low. Intermittent Fault (B5254T2; 2003-2004)
- ECM-280A: Front Heated Oxygen Sensor (Ho2S), Bank 1. Signal Too Low. Permanent Fault (B5244T3; 2001-2002)
- ECM-280A: Front Heated Oxygen Sensor (Ho2S), Bank 1. Signal Too Low. Permanent Fault (B5254T2; 2003-2004)
- ECM-280B: Fuel Pressure Sensor. Signal Missing (B5254T2; 2005-2006)
- ECM-280B: Fuel Pressure Sensor. Signal Missing (B5254T2; 2007)
- ECM-280C: Fuel Pressure Sensor. Signal Too High (B5254T2; 2005-2007)
- ECM-280D: Fuel Pressure Sensor. Signal Too Low (B5254T2; 2005-2007)
- ECM-2810: Front Heated Oxygen Sensor (Ho2S), Bank 1 Heating. Faulty Signal. Intermittent Fault (B5244T3; 2001-2002)
- ECM-2810: Front Heated Oxygen Sensor (Ho2S), Bank 1 Heating. Faulty Signal. Intermittent Fault (B5254T2; 2003-2004)
- ECM-2810: Front Heated Oxygen Sensor (Ho2S), Bank 1 Heating. Faulty Signal. Permanent Fault (B5244T3; 2001-2002)
- ECM-2810: Front Heated Oxygen Sensor (Ho2S), Bank 1 Heating. Faulty Signal. Permanent Fault (B5254T2; 2003-2004)
- ECM-2810: Front Heated Oxygen Sensor (Ho2S), Bank 1 Heating. Signal Missing. Intermittent Fault (B5244T3; 2001-2002)
- ECM-2810: Front Heated Oxygen Sensor (Ho2S), Bank 1 Heating. Signal Missing. Intermittent Fault (B5254T2; 2003-2004)
- ECM-2810: Front Heated Oxygen Sensor (Ho2S), Bank 1 Heating. Signal Missing. Permanent Fault (B5244T3; 2001-2002)
- ECM-2810: Front Heated Oxygen Sensor (Ho2S), Bank 1 Heating. Signal Missing. Permanent Fault (B5254T2; 2003-2004)
- ECM-2810: Front Heated Oxygen Sensor (Ho2S), Bank 1 Heating. Signal Too High. Intermittent Fault (B5244T3; 2001-2002)
- ECM-2810: Front Heated Oxygen Sensor (Ho2S), Bank 1 Heating. Signal Too High. Intermittent Fault (B5254T2; 2003-2004)
- ECM-2810: Front Heated Oxygen Sensor (Ho2S), Bank 1 Heating. Signal Too High. Permanent Fault (B5244T3; 2001-2002)
- ECM-2810: Front Heated Oxygen Sensor (Ho2S), Bank 1 Heating. Signal Too High. Permanent Fault (B5254T2; 2003-2004)
- ECM-2810: Front Heated Oxygen Sensor (Ho2S), Bank 1 Heating. Signal Too Low. Intermittent Fault (B5244T3; 2001-2002)
- ECM-2810: Front Heated Oxygen Sensor (Ho2S), Bank 1 Heating. Signal Too Low. Intermittent Fault (B5254T2; 2003-2004)
- ECM-2810: Front Heated Oxygen Sensor (Ho2S), Bank 1 Heating. Signal Too Low. Permanent Fault (B5244T3; 2001-2002)
- ECM-2810: Front Heated Oxygen Sensor (Ho2S), Bank 1 Heating. Signal Too Low. Permanent Fault (B5254T2; 2003-2004)
- ECM-281C: Text Message. Pressure Too High (B5254T2; 2007)
- ECM-2820: Heated Oxygen Sensor (Ho2S) Bank 1, Preheating. Faulty Signal. Intermittent Fault (B5244T3; 2002)
- ECM-2820: Heated Oxygen Sensor (Ho2S) Bank 1, Preheating. Faulty Signal. Permanent Fault (B5244T3; 2002)
- ECM-2820: Heated Oxygen Sensor (Ho2S) Bank 1, Preheating. Signal Missing. Intermittent Fault (B5244T3; 2002)
- ECM-2820: Heated Oxygen Sensor (Ho2S) Bank 1, Preheating. Signal Missing. Permanent Fault (B5244T3; 2002)
- ECM-2820: Heated Oxygen Sensor (Ho2S) Bank 1, Preheating. Signal Too High. Intermittent Fault (B5244T3; 2002)
- ECM-2820: Heated Oxygen Sensor (Ho2S) Bank 1, Preheating. Signal Too High. Permanent Fault (B5244T3; 2002)
- ECM-2820: Heated Oxygen Sensor (Ho2S) Bank 1, Preheating. Signal Too Low. Intermittent Fault (B5244T3; 2002)
- ECM-2820: Heated Oxygen Sensor (Ho2S) Bank 1, Preheating. Signal Too Low. Permanent Fault (B5244T3; 2002)
- ECM-2900: Fuel Pressure. Faulty Signal (B5254T2; 2005-2007)
- ECM-290B: Fuel Pressure. Signal Missing (B5254T2; 2005-2007)
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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