P1634high severityPowertrain
Ignition 1 Power Circuit Low Voltage
on 2016 Chevrolet Impala 3.6L V6 LFX · AWD
What this code means
The PCM detected low voltage on the Ignition 1 power supply circuit.
Symptoms
- Check Engine Light
- Engine stalling
- Erratic gauges
- Multiple system malfunctions
Common causes
- Faulty ignition switch
- Blown Ignition 1 fuse
- Corroded connections
- Damaged wiring in ignition circuit
Diagnostic steps
- Test Ignition 1 circuit voltage at PCM
- Check Ignition 1 fuse
- Test ignition switch
- Inspect wiring and connectors
Repair notes
Check fuse and ignition switch. Repair wiring as needed.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1