P1634
Ignition 1 Power Circuit Low Voltage
2014-2016 Chevrolet Spark EV Electric Motor
High SeverityPowertrain
Description
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.
Related Codes
P1600PCM Battery Direct Power CircuitP1600Loss of KAM Power — Open CircuitP1600Loss of KAM Power Circuit OpenP1600PCM Battery Direct Power CircuitP1600Loss of KAM Power — Open CircuitP1600ECM Battery Backup CircuitP1600PCM Battery Direct Power CircuitP1600PCM Battery Direct Power CircuitP1600PCM Battery Direct Power CircuitP1600PCM Battery Direct Power CircuitP1600Loss of KAM Power — Open CircuitP1600ECM Battery Backup CircuitP1600PCM Battery Direct Power CircuitP1600PCM Battery Direct Power CircuitP1600ECM Battery Backup CircuitP1633ECM Malfunction ETCS CircuitP1633Keep Alive Power Voltage Too LowP1633Keep Alive Power Voltage Too LowP1633Keep Alive Power Voltage Too LowP1633Ignition Supply Power Circuit Low VoltageP1633Ignition Supply Power Circuit Low VoltageP1633Ignition Supply Power Circuit Low VoltageP1633Ignition Supply Power Circuit Low VoltageP1633Ignition Supply Power Circuit Low VoltageP1633Ignition Supply Power Circuit Low VoltageP1633Ignition Supply Power Circuit Low VoltageP1633Ignition Supply Power Circuit Low VoltageP1633ECM Malfunction ETCS CircuitP1633KAM Voltage Too LowP1633ECM Malfunction ETCS CircuitP1682Ignition 1 Switch Circuit 2 (Driver 5 Line 2)P1682Ignition 1 Switch Circuit 2 (Driver 5 Line 2)P1682Charging System Voltage LowP1682Charging System Voltage LowP1682Charging System Voltage LowP1682Charging System Voltage LowP1682Ignition 1 Switch Circuit 2 (Driver 5 Line 2)P1682Ignition 1 Switch Circuit 2 (Driver 5 Line 2)P1682Ignition 1 Switch Circuit 2 (Driver 5 Line 2)P1682Ignition 1 Switch Circuit 2 (Driver 5 Line 2)P1682Ignition 1 Switch Circuit 2 (Driver 5 Line 2)P1682Ignition 1 Switch Circuit 2 (Driver 5 Line 2)
Other Powertrain Codes
- P0070Ambient Air Temperature Sensor Circuit
- P0071Ambient Air Temperature Sensor Range/Performance
- P0072Ambient Air Temperature Sensor Circuit Low
- P0073Ambient Air Temperature Sensor Circuit High
- P0115Engine Coolant Temperature (ECT) Sensor 1 Circuit
- P0116ECT Sensor 1 Circuit Range/Performance
- P0117ECT Sensor 1 Circuit Low Input
- P0118ECT Sensor 1 Circuit High Input
- P0119ECT Sensor 1 Circuit Intermittent
- P0125Insufficient Coolant Temperature for Closed Loop Fuel Control
P1634 on Other Vehicles
Chevrolet Astro
1995-2005 4.3L V6 Vortec
Chevrolet Avalanche
2002-2006 5.3L V8 Vortec
Chevrolet Avalanche
2002-2006 8.1L V8 Vortec
Chevrolet Avalanche
2007-2013 5.3L V8 Vortec
Chevrolet Avalanche
2007-2013 6.0L V8 Vortec
Chevrolet Aveo
2012-2018 1.6L I4
Chevrolet Beat
2018-2021 1.2L I4
Chevrolet Beretta
1990-1996 2.2L I4
Common Questions
What does code P1634 mean on a 2014-2016 Chevrolet Spark EV?
P1634 stands for "Ignition 1 Power Circuit Low Voltage". The PCM detected low voltage on the Ignition 1 power supply circuit.
What are the symptoms of P1634 on a Chevrolet Spark EV?
Common symptoms of P1634 include: Check Engine Light, Engine stalling, Erratic gauges, Multiple system malfunctions.
What causes P1634 on a 2014-2016 Chevrolet Spark EV?
Common causes of P1634 include: Faulty ignition switch, Blown Ignition 1 fuse, Corroded connections, Damaged wiring in ignition circuit.