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.
2011 Volvo C70FACTORY OEM SERVICE PROCEDURE
Phone Module, Subwoofer Module, GPS Module, And Traffic Message Channel Module - Diagnostic Trouble Codes
- PHM-0080: VOLVO On Call Buttons Wrong Switches Mounted (2009-2013)
- PHM-0080: VOLVO On Call Switch. Incorrect Keypad Installed (2006-2008)
- PHM-0082: VOLVO On Call Buttons Activated Too Long (2009-2013)
- PHM-0082: VOLVO On Call Switch. Activated Too Long (2006-2008)
- PHM-0090: Control Module. Incorrect Software (2008)
- PHM-0100: Control Module Configuration Fault (2009-2013)
- PHM-0211: Internal Backup Speaker Signal Too Low (2009-2013)
- PHM-0215: Emergency Microphone Signal Too High/Signal Missing (2009-2013)
- PHM-1A51: Control Module Incorrect Software (2009-2013)
- PHM-1A54: Control Module Incorrect Software (2009-2013)
- PHM-4E96: Control Module Internal Fault (2009-2013)
- PHM-5529: Internal Backup Antenna Invalid Signal (2009-2013)
- PHM-5611: Telephone Antenna Signal Too Low (2009-2013)
- PHM-5615: Telephone Antenna Signal Too High/Signal Missing (2009-2013)
- PHM-6911: Handset Hook Signal Too Low (2009-2013)
- PHM-6915: Handset Hook Signal Too High/Signal Missing (2009-2013)
- PHM-6A11: Handset Microphone Signal Too Low (2009-2013)
- PHM-6A15: Handset Microphone Signal Too High/Signal Missing (2009-2013)
- PHM-6B11: Handset Speaker Signal Too Low (2009-2013)
- PHM-6B15: Handset Speaker Signal Too High/Signal Missing (2009-2013)
- PHM-7B11: Handset Supply Signal Too Low (2009-2013)
- PHM-7B12: Handset Supply Signal Too High (2009-2013)
- PHM-9F11: GPS-Antenna Signal Too Low (2009-2013)
- PHM-9F13: GPS-Antenna Signal Missing (2009-2013)
- PHM-A211: Crash Signal Too Low (2009-2013)
- PHM-A215: Crash Signal Too High/Signal Missing (2009-2013)
- PHM-A238: Crash Signal Faulty Signal (2009-2013)
- PHM-C000: Control Module Software Fault (2009-2013)
- PHM-E001: Control Module Communication Software Error (2009-2013)
- PHM-E001: Control Module Communication. Fault In Software (2006-2008)
- PHM-E003: Configuration Fault Software Fault (2009-2013)
- PHM-E003: Configuration Fault. Software Fault (2006-2008)
- PHM-E010: Power Supply Faulty Signal (2009-2013)
- PHM-E010: Power Supply. Faulty Signal (2006-2008)
- PHM-XXXX: Unknown Diagnostic Trouble Code (DTC) For The Current Control Module Version (2006-2008)
- Sub-0001: Control Module. Internal Fault (2006-2007)
- Sub-0002: Coil, Left Subwoofer. Open Circuit (2006-2007)
- Sub-0002: Coil, Left Subwoofer. Open Circuit (2008-2013)
- Sub-0003: Coil, Right Subwoofer. Open Circuit (2006-2007)
- Sub-0003: Coil, Right Subwoofer. Open Circuit (2008-2013)
- Sub-0004: Coil, Left Subwoofer. Short-Circuit To Ground (2006-2007)
- Sub-0005: Coil, Right Subwoofer. Short-Circuit To Ground (2006-2007)
- Sub-0006: Coil, Subwoofer. Short To Ground (2008-2013)
- Sub-001B: Configuration Fault. Software Fault (2008-2013)
- Sub-001B: Configuration Fault. Software Fault (2006-2007)
- Sub-001D: Control Module. Internal Fault (2008-2013)
- Sub-001D: Control Module. Internal Fault (2006-2007)
- Sub-001E: Control Module. Internal Fault (2006-2007)
- Sub-001E: Control Module. Internal Fault (2008-2013)
- Sub-001F: Control Module. Internal Fault (2006-2007)
- Sub-001F: Control Module. Internal Fault (2008-2013)
- Sub-0020: Control Module. Internal Fault (2006-2007)
- Sub-0020: Control Module. Internal Fault (2008-2013)
- Sub-0021: Control Module. Internal Fault (2006-2007)
- Sub-0021: Control Module. Internal Fault (2008-2013)
- Sub-0022: Control Module. Internal Fault (2008-2013)
- Sub-0022: Control Module. Internal Fault (2006-2007)
- Sub-0023: Subwoofer. Shorted (2006-2007)
- Sub-0025: Control Module. Internal Fault (2006-2007)
- Sub-0025: Control Module. Internal Fault (2008-2013)
- GPS-0001: GPS Antenna. Signal Missing (2006-2007)
- GPS-0002: GPS Antenna. Signal Too High (2006-2007)
- GPS-0003: Control Module. Internal Fault (2006-2007)
- GPS-XXXX: Unknown Diagnostic Trouble Code (DTC) For The Relevant Control Module Version (2006-2007)
- TMC-0001: Antenna TMC. Signal Missing (2006-2007)
- TMC-0002: Antenna TMC. Signal Too High (2006-2007)
- TMC-XXXX: Unknown Diagnostic Trouble Code (DTC) For The Relevant Control Module Version (2006-2007)
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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