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.
2008 Volvo C70 StandardFACTORY 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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