P2603
Coolant Pump A Control Circuit High
2014-2021 BMW i3 Range Extender
Moderate SeverityPowertrainGeneric (SAE)
Description
High voltage on auxiliary coolant pump circuit.
Symptoms
- Check engine light
- Pump runs constantly
Common Causes
- Open ground
- Short to power
- Control module issue
Diagnostic Steps
- Check ground circuit
- Measure voltage
Repair Notes
Repair wiring or replace pump.
Related Codes
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
P2603 on Other Vehicles
Common Questions
What does code P2603 mean on a 2014-2021 BMW i3?
P2603 stands for "Coolant Pump A Control Circuit High". High voltage on auxiliary coolant pump circuit.
What are the symptoms of P2603 on a BMW i3?
Common symptoms of P2603 include: Check engine light, Pump runs constantly.
What causes P2603 on a 2014-2021 BMW i3?
Common causes of P2603 include: Open ground, Short to power, Control module issue.