Code result
P0A03
Motor Electronics Coolant Temperature Sensor High Input
High severity
What it means
Voltage at motor electronics coolant temperature sensor above threshold. The engine coolant temperature sensor feeds warm-up enrichment, fan control and closed-loop entry — a stuck-cold reading keeps the engine in open loop and rich forever.
Is it safe to drive?
No — stop driving
This code points to a problem that can cause damage or affect safety. Avoid driving and have the vehicle diagnosed promptly.
Most likely causes
Open sensor circuit
highOne of the most commonly reported causes for this code — check this first.
Related help
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