VOLVO
IGM-P118846 - Calibration Memory. System Internal Failures. Calibration / parameter memory failure
System
Unknown System / Manufacturer Specific
Volvo models this fault code applies to
Applies to the following models:
1 modelV60 (2011–)
Show models by year and engine (2)
What does this fault code mean?
The high voltage generator control module (IGM) monitors its internal memory, where the vehicle configuration and calibration data are stored among other things. The code is stored when a calibration file is missing or incorrect. The fault is only checked once the test has started at ignition on.
Possible causes
- Calibration not completed
- Calibration failed
- Calibration or parameter memory is incorrect, incompatible or not programmed
- Damaged or incorrect internal memory
What you can do
- 1Read out, clear the code and start the car to see whether it comes back
- 2Have a workshop check the calibration of the control module and recalibrate it if needed
- 3The high voltage system may only be handled by a workshop; do not work on it yourself
Symptoms you may notice5
- Warning symbol and text message in the display
- Warning about power supply problems from the alternator and charge regulator
- Charging of the high voltage battery while driving is absent, reduced or not working correctly
- High voltage battery is discharged or charges poorly
- HYBRID drive mode: the combustion engine is active all the time or too often
What the fault can affect1
- The high voltage battery cannot be charged by the combustion engine
General guidance for car owners. Diagnosis on the car can point to a different cause.