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Volvo All Engines (2010 Emissions) Fault Code: SPN 158 FMI 18 PID: PSID 124 Keyswitch Battery Potential – Moderately Severe Level
Battery voltage is monitored by the circuits within the Engine Control Module (ECM).
Conditions for diagnostic trouble code (DTC):
1) Lower voltage than normal
Probable cause
1) Low battery voltage
2) Voltage supply
3) Ground connection
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