P1682moderate severityPowertrain
Charging System Voltage Low
on 2005 Jeep Wrangler 2.4L I4 · 4WD
What this code means
The PCM has detected that the charging system voltage is below the acceptable operating range. The alternator is not providing sufficient voltage to maintain the battery charge and power the vehicle electrical systems.
Symptoms
- Check Engine Light
- Battery warning light on
- Dim headlights
- Electrical accessories losing power
- Battery draining
Common causes
- Faulty alternator or voltage regulator
- Worn or slipping serpentine belt
- Poor electrical connections at alternator
- Corroded battery terminals
- Excessive electrical load from accessories
Diagnostic steps
- Measure charging voltage at battery with engine running (should be 13.5-14.8V)
- Inspect serpentine belt tension and condition
- Check alternator wiring connections
- Test alternator output with load tester
- Inspect battery cables and terminals
Repair notes
Replace the alternator if output is below specification; check belt and connections first.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0011
Intake Camshaft Position Timing Over-Advanced Bank 1
P0012
Intake Camshaft Position Timing Over-Retarded Bank 1
P0013
Exhaust Camshaft Position Actuator Circuit/Open Bank 1
P0014
Exhaust Camshaft Position Timing Over-Advanced Bank 1
P0015
Exhaust Camshaft Position Timing Over-Retarded Bank 1