Fault Code P0428
Code meaning, symptoms, possible causes, part number, and estimated cost.
P0428
Catalyst Temperature Sensor Circuit High Input (Bank 1 Sensor 1)
Code P0428 indicates an abnormally high voltage reading from the catalytic converter temperature sensor, Bank 1 Sensor 1. This can suggest overheating of the converter.
Part Details
Part Name
Catalytic Converter Temperature Sensor
Reference P/N (OEM)
N/A
General part number for this fault code — not necessarily for your specific vehicle
Estimated Cost
₪400 - ₪1200
Engine Location
Exhaust system before the catalytic converter
Symptoms
- Check Engine Light on
- Sulfur or rotten egg smell
- Reduced engine power
- Increased fuel consumption
Possible Causes
- 1Faulty temperature sensor
- 2Short circuit in sensor circuit
- 3Damaged wiring or corrosion
- 4Catalytic converter overheating
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