B0404
Temperature Gauge Circuit Malfunction
2016-2021 Mazda CX-3 2.0L I4
Low SeverityBodyGeneric (SAE)
Description
The engine temperature gauge in the instrument cluster is not functioning or reads incorrectly.
Symptoms
- Temperature gauge stuck at cold
- Gauge stuck at hot
- Temperature gauge erratic
- No temperature warning capability
Common Causes
- Faulty coolant temperature sender for gauge
- Cluster gauge failure
- Wiring issue
- Sender connector corroded
Diagnostic Steps
- Check coolant temp sender resistance
- Test gauge with simulated resistance
- Inspect sender connector
- Compare scan tool temp to gauge reading
Repair Notes
Replace coolant temperature sender for gauge (separate from ECT sensor) or repair cluster.
Related Codes
Other Body Codes
- B0001Driver Frontal Stage 1 Deployment Control
- B0001Driver Frontal Stage 1 Deployment Control
- B0002Driver Frontal Stage 2 Deployment Control
- B0002Driver Frontal Stage 2 Deployment Control
- B0003Passenger Frontal Stage 1 Deployment Control
- B0003Passenger Frontal Stage 1 Deployment Control
- B0004Passenger Frontal Stage 2 Deployment Control
- B0004Passenger Frontal Stage 2 Deployment Control
- B0005Driver Knee Airbag Deployment Circuit
- B0005Driver Knee Airbag Deployment Circuit
B0404 on Other Vehicles
Common Questions
What does code B0404 mean on a 2016-2021 Mazda CX-3?
B0404 stands for "Temperature Gauge Circuit Malfunction". The engine temperature gauge in the instrument cluster is not functioning or reads incorrectly.
What are the symptoms of B0404 on a Mazda CX-3?
Common symptoms of B0404 include: Temperature gauge stuck at cold, Gauge stuck at hot, Temperature gauge erratic, No temperature warning capability.
What causes B0404 on a 2016-2021 Mazda CX-3?
Common causes of B0404 include: Faulty coolant temperature sender for gauge, Cluster gauge failure, Wiring issue, Sender connector corroded.