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.
2004 Volvo V70 R, AutomaticFACTORY OEM SERVICE PROCEDURE
Engine Control Module (ECM) Diagnostic Trouble Codes (DTC) - 11 Of 14
- ECM-901A: Communication Control Module, Communication Problems, Faulty Signal, Permanent Fault-901A Engine Control Module (ECM) Communication, Communication Fault (B5234T3; B5244T3; 2001)
- ECM-901A: Engine Control Module (ECM) Communication, Faulty Signal (B5244S; 2001-2002)
- ECM-901E: Engine Control Module (ECM), Internal Fault (B5234T3; B5244T3; 2001)
- ECM-902A: Communication With Throttle Unit, Faulty Signal (B5244S; 2001-2002)
- ECM-902A: Communication With Throttle Unit, Signal Missing (B5234T3; B5244T3; 2001)
- ECM-902A: Communication With Throttle Unit, Signal Too High (B5234T3; B5244T3; 2001)
- ECM-902A: Throttle Unit Communication, Signal Too Low (B5234T3; B5244T3; 2001)
- ECM-902B: Communication With Throttle Unit, Signal Too High (B5244S; 2001-2002)
- ECM-902B: Communication With Throttle Unit, Signal Too Low (B5244S; 2001-2002)
- ECM-902C: Engine Control Module (ECM), Internal Fault (B5244S; 2003-2007)
- ECM-902C: Engine Control Module (ECM), Internal Fault (B5244S6; 2003-2006)
- ECM-903C: Reconfiguration Emission System, Information (B5234T3; B5244T3; 2001)
- ECM-903C: Throttle Position (TP) Sensor, Faulty Signal (B5234T3; 2002-2004)
- ECM-903C: Throttle Position (TP) Sensor, Faulty Signal (B5244T3; 2002-2003)
- ECM-903C: Throttle Position (TP) Sensor, Faulty Signal (B5254T2; 2003-2004)
- ECM-903C: Throttle Position (TP) Sensor, Faulty Signal (B5254T4; 2004)
- ECM-903F: Throttle Position (TP), Signal Missing (B5244S; 2001-2002)
- ECM-903F: Throttle Position (TP), Signal Too High (B5234T3; B5244T3; 2001)
- ECM-903F: Throttle Position (TP), Signal Too High (B5244S; 2001-2002)
- ECM-903F: Throttle Position (TP), Signal Too Low/Signal Missing (B5234T3; B5244T3; 2001)
- ECM-904C: Reconfiguration Emission System, Information (B5234T3; B5244T3; 2001-2002)
- ECM-904C: Throttle Position (TP) Sensor 1 And 2, Faulty Signal (B5234T3; B5244T3; 2001-2002)
- ECM-904D: Text Message, Information (B5234T3; B5244T3; 2001-2002)
- ECM-9050: Memory Fault In Ram, Internal Fault, Intermittent Fault (B5234T3; 2002-2004)
- ECM-9050: Memory Fault In Ram, Internal Fault, Intermittent Fault (B5244T3; 2002-2003)
- ECM-9050: Memory Fault In Ram, Internal Fault, Intermittent Fault (B5254T2; 2003-2004)
- ECM-9050: Memory Fault In Ram, Internal Fault, Intermittent Fault (B5254T4; 2004)
- ECM-9050: Memory Fault In Ram, Internal Fault, Permanent Fault (B5234T3; 2002-2004)
- ECM-9050: Memory Fault In Ram, Internal Fault, Permanent Fault (B5244T3; 2002-2003)
- ECM-9050: Memory Fault In Ram, Internal Fault, Permanent Fault (B5254T2; 2003-2004)
- ECM-9050: Memory Fault In Ram, Internal Fault, Permanent Fault (B5254T4; 2004)
- ECM-9060: Memory Fault In ROM, Internal Fault, Intermittent Fault (B5234T3; 2002-2004)
- ECM-9060: Memory Fault In ROM, Internal Fault, Intermittent Fault (B5244T3; 2002-2003)
- ECM-9060: Memory Fault In ROM, Internal Fault, Intermittent Fault (B5254T2; 2003-2004)
- ECM-9060: Memory Fault In ROM, Internal Fault, Intermittent Fault (B5254T4; 2004)
- ECM-9060: Memory Fault In ROM, Internal Fault, Permanent Fault (B5234T3; 2002-2004)
- ECM-9060: Memory Fault In ROM, Internal Fault, Permanent Fault (B5244T3; 2002-2003)
- ECM-9060: Memory Fault In ROM, Internal Fault, Permanent Fault (B5254T2; 2003-2004)
- ECM-9060: Memory Fault In ROM, Internal Fault, Permanent Fault (B5254T4; 2004)
- ECM-9070: Engine Control Module (ECM), Internal Fault, Intermittent Fault (B5234T3; 2002-2004)
- ECM-9070: Engine Control Module (ECM), Internal Fault, Intermittent Fault (B5244T3; 2002-2003)
- ECM-9070: Engine Control Module (ECM), Internal Fault, Intermittent Fault (B5254T2; 2003-2004)
- ECM-9070: Engine Control Module (ECM), Internal Fault, Intermittent Fault (B5254T4; 2004)
- ECM-9070: Engine Control Module (ECM), Internal Fault, Permanent Fault (B5234T3; 2002-2004)
- ECM-9070: Engine Control Module (ECM), Internal Fault, Permanent Fault (B5244T3; 2002-2003)
- ECM-9070: Engine Control Module (ECM), Internal Fault, Permanent Fault (B5254T2; 2003-2004)
- ECM-9070: Engine Control Module (ECM), Internal Fault, Permanent Fault (B5254T4; 2004)
- ECM-9100: Clutch Pedal Position Sensor, Faulty Signal (B5244T5; B5254T2; B5254T4; 2005-2007)
- ECM-9100: Engine Control Module (ECM), Faulty Signal (B5234T3; 2002-2004)
- ECM-9100: Engine Control Module (ECM), Faulty Signal (B5244T3; 2002-2003)
- ECM-9100: Engine Control Module (ECM), Faulty Signal (B5254T2; 2003-2004)
- ECM-9100: Engine Control Module (ECM), Faulty Signal (B5254T4; 2004)
- ECM-910B: Clutch Pedal Sensor, Signal Missing (B5244T5; B5254T2; B5254T4; 2005-2006)
- ECM-910C: Clutch Pedal Sensor, Signal Too High (B5244T5; B5254T2; B5254T4; 2005-2007)
- ECM-910D: Clutch Pedal Sensor, Signal Too Low (B5244T5; B5254T2; B5254T4; 2005-2007)
- ECM-910E: Throttle Valve, Internal Fault (B5234T3; B5244T3; 2001)
- ECM-910E: Throttle Valve, Internal Fault (B5244S; 2001-2002)
- ECM-9117: Throttle Unit, Faulty Signal (B5234T3; 2002-2004)
- ECM-9117: Throttle Unit, Faulty Signal (B5244T3; 2002-2003)
- ECM-9117: Throttle Unit, Faulty Signal (B5254T2; 2003-2004)
- ECM-9117: Throttle Unit, Faulty Signal (B5254T4; 2004)
- ECM-911A: Throttle Unit Communication, Faulty Communication (B5234T3; B5244T3; 2001)
- ECM-911A: Throttle Unit Communication, Faulty Communication (B5244S; 2001-2002)
- ECM-912A: Communication With The Engine Control Module (ECM), Signal Missing (B5234T3; B5244T3; 2001)
- ECM-912A: Communication With The Engine Control Module (ECM), Signal Missing (B5244S; 2001-2002)
- ECM-913C: Throttle Unit, Faulty Signal (B5234T3; 2002-2004)
- ECM-913C: Throttle Unit, Faulty Signal (B5244T3; 2002-2003)
- ECM-913C: Throttle Unit, Faulty Signal (B5254T2; 2003-2004)
- ECM-913C: Throttle Unit, Faulty Signal (B5254T4; 2004)
- ECM-913F: Throttle Position (TP), Non Plausible Request (B5234T3; B5244T3; 2001)
- ECM-913F: Throttle Position (TP), Non Plausible Request (B5244S; 2001-2002)
- ECM-913F: Throttle Unit, Faulty Signal (B5234T3; 2002-2004)
- ECM-913F: Throttle Unit, Faulty Signal (B5244T3; 2002-2003)
- ECM-913F: Throttle Unit, Faulty Signal (B5254T2; 2003-2004)
- ECM-913F: Throttle Unit, Faulty Signal (B5254T4; 2004)
- ECM-914F: Throttle Position (TP) Sensor 1 And 2, Faulty Signal (B5234T3; B5244T3; 2001)
- ECM-914F: Throttle Position (TP) Sensor 1 And 2, Faulty Signal (B5244S; 2001-2002)
- ECM-914F: Throttle Unit, Faulty Signal (B5234T3; 2002-2004)
- ECM-914F: Throttle Unit, Faulty Signal (B5244T3; 2002-2003)
- ECM-914F: Throttle Unit, Faulty Signal (B5254T2; 2003-2004)
- ECM-914F: Throttle Unit, Faulty Signal (B5254T4; 2004)
- ECM-9150: Throttle Position (TP) Sensor 1, Faulty Signal (B5234T3; B5244T3; 2001)
- ECM-9150: Throttle Position (TP) Sensor 1, Faulty Signal (B5244S; 2001-2002)
- ECM-9150: Throttle Unit, Potentiometer 1, Faulty Signal (B5234T3; 2002-2004)
- ECM-9150: Throttle Unit, Potentiometer 1, Faulty Signal (B5244T3; 2002-2003)
- ECM-9150: Throttle Unit, Potentiometer 1, Faulty Signal (B5254T2; 2003-2004)
- ECM-9150: Throttle Unit, Potentiometer 1, Faulty Signal (B5254T4; 2004)
- ECM-9150: Throttle Unit, Potentiometer 1, Signal Too High (B5234T3; 2002-2004)
- ECM-9150: Throttle Unit, Potentiometer 1, Signal Too High (B5244T3; 2002-2003)
- ECM-9150: Throttle Unit, Potentiometer 1, Signal Too High (B5254T2; 2003-2004)
- ECM-9150: Throttle Unit, Potentiometer 1, Signal Too High (B5254T4; 2004)
- ECM-9150: Throttle Unit, Potentiometer 1, Signal Too Low (B5234T3; 2002-2004)
- ECM-9150: Throttle Unit, Potentiometer 1, Signal Too Low (B5244T3; 2002-2003)
- ECM-9150: Throttle Unit, Potentiometer 1, Signal Too Low (B5254T2; 2003-2004)
- ECM-9150: Throttle Unit, Potentiometer 1, Signal Too Low (B5254T4; 2004)
- ECM-9160: Throttle Position (TP) Sensor 2, Faulty Signal (B5234T3; B5244T3; 2001)
- ECM-9160: Throttle Position (TP) Sensor 2, Faulty Signal (B5244S; 2001-2002)
- ECM-9160: Throttle Unit, Potentiometer 2, Faulty Signal (B5234T3; 2002-2004)
- ECM-9160: Throttle Unit, Potentiometer 2, Faulty Signal (B5244T3; 2002-2003)
- ECM-9160: Throttle Unit, Potentiometer 2, Faulty Signal (B5254T2; 2003-2004)
- ECM-9160: Throttle Unit, Potentiometer 2, Faulty Signal (B5254T4; 2004)
- ECM-9160: Throttle Unit, Potentiometer 2, Signal Too High (B5234T3; 2002-2004)
- ECM-9160: Throttle Unit, Potentiometer 2, Signal Too High (B5244T3; 2002-2003)
- ECM-9160: Throttle Unit, Potentiometer 2, Signal Too High (B5254T2; 2003-2004)
- ECM-9160: Throttle Unit, Potentiometer 2, Signal Too High (B5254T4; 2004)
- ECM-9160: Throttle Unit, Potentiometer 2, Signal Too Low (B5234T3; 2002-2004)
- ECM-9160: Throttle Unit, Potentiometer 2, Signal Too Low (B5244T3; 2002-2003)
- ECM-9160: Throttle Unit, Potentiometer 2, Signal Too Low (B5254T2; 2003-2004)
- ECM-9160: Throttle Unit, Potentiometer 2, Signal Too Low (B5254T4; 2004)
- ECM-9170: Throttle Unit, Faulty Signal (B5234T3; 2002-2004)
- ECM-9170: Throttle Unit, Faulty Signal (B5244T3; 2002-2003)
- ECM-9170: Throttle Unit, Faulty Signal (B5254T2; 2003-2004)
- ECM-9170: Throttle Unit, Faulty Signal (B5254T4; 2004)
- ECM-917F: Accelerator Pedal Position, Faulty Signal (B5234T3; B5244T3; 2001)
- ECM-917F: Accelerator Pedal Position, Faulty Signal (B5244S; 2001-2002)
- ECM-917F: Throttle Unit, Faulty Signal (B5234T3; B5244T3; 2002)
- ECM-9180: Accelerator Pedal (AP) Position Sensor, Faulty Signal (B5234T3; B5244T3; 2001)
- ECM-9180: Accelerator Pedal (AP) Position Sensor, Faulty Signal (B5244S; 2001-2002)
- ECM-918A: Engine Control Module (ECM), Internal Fault, Intermittent Fault (B5234T3; 2002-2004)
- ECM-918A: Engine Control Module (ECM), Internal Fault, Intermittent Fault (B5244T3; 2002-2003)
- ECM-918A: Engine Control Module (ECM), Internal Fault, Intermittent Fault (B5254T2; 2003-2004)
- ECM-918A: Engine Control Module (ECM), Internal Fault, Intermittent Fault (B5254T4; 2004)
- ECM-918A: Engine Control Module (ECM), Internal Fault, Permanent Fault (B5234T3; 2002-2004)
- ECM-918A: Engine Control Module (ECM), Internal Fault, Permanent Fault (B5244T3; 2002-2003)
- ECM-918A: Engine Control Module (ECM), Internal Fault, Permanent Fault (B5254T2; 2003-2004)
- ECM-918A: Engine Control Module (ECM), Internal Fault, Permanent Fault (B5254T4; 2004)
- ECM-918F: Accelerator Pedal (AP) Position Sensor, Faulty Signal (B5244S; 2001-2002)
- ECM-9190: Throttle Position (TP), Faulty Current (B5234T3; B5244T3; 2001)
- ECM-9190: Throttle Position (TP), Faulty Current (B5244S; 2001-2002)
- ECM-919A: Engine Control Module (ECM), Faulty Signal (B5234T3; 2002-2004)
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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