B1318 - Battery Voltage Low

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
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Possible causes

  • Battery defective
  • Loose or missing alternator drive belt
  • Faulty Alternator
  • Alternator harness is open or shorted
  • Alternator circuit poor electrical connection
  • Faulty Powertrain Control Module (PCM)

Tech notes

According to the 1996 Ford Explorer factory service manual, the B1317 and B1318 codes depend on which module the code was generated.

B1317
Four-Wheel Antilock Brake (4WABS) Control Module: Antilock Brake System Problem
Generic Electronic Module (GEM): Battery Voltage High

B1318
Automatic Ride Control (ARC) Module: Suspension Control (Automatic - Electronic Level)
Generic Electronic Module (GEM): Battery Voltage Low

Possible symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

B1318 Description

With the engine running, the charging system supplies voltage to the battery and the vehicle electrical system through the battery B+ cable. The voltage that is supplied to the vehicle electrical system is used for the operation of the various vehicle systems and modules. Many modules monitor this voltage and if it rises above or below their calibrated setpoints, a Diagnostic Trouble Code (DTC) sets.
OBDII Code B1318 - Battery Voltage Low - AutoCodes.com

B1318 Information for specific makes

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B1318 Comments

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