P0AF9 - Hybrid Battery System Voltage Unstable
P0AF9 Possible Causes
- 36 volt battery cable open
- Hybrid Battery Pack fuse open
- Hybrid Battery Pack contactor open
- Hybrid Battery Pack ground cable or connection
How is the P0AF9 code repair?Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.
What is the cost to diagnose the P0AF9 code
Labor: 1.0The cost to diagnose the P0AF9 code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
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- Engine Light ON (or Service Engine Soon Warning Light)
P0AF9 MeaningThe Engine Control Module (ECM) monitors the correlation of the generator battery disconnect control module battery voltage and the Starter Generator Control Module (SGCM) output voltage to detect a 36 volt cable open or fuse/relay failure. The ECM also monitors to detect an over voltage condition and protect the MOSFET (load dump). If either one of these conditions is detected, the appropriate Diagnostic Trouble Code (DTC) will set.
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