B0404low severityBody
Temperature Gauge Circuit Malfunction
on 2010 Cadillac CTS 3.0L V6 · AWD
What this code means
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.
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B0002
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B0002
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B0003
Passenger Frontal Stage 1 Deployment Control
B0003
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B0004
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B0004
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B0005
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B0005
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