P0426
Catalyst Temperature Sensor Range/Performance Bank 1 Sensor 1
Generic code
Auxiliary Emissions Control
Medium severity
Moderate repair
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What P0426 means
- The fault code P0426 indicates that there is an issue with the Catalyst Temperature Sensor performance for Bank 1. This may cause the engine to run poorly or not start at all.
Possible symptoms
- Illuminated check engine light
- Reduced engine power or acceleration
- Poor fuel economy
- Failed emissions test
Possible causes
- Faulty catalyst temperature sensor
- Damaged wiring or connections in the circuit
- Corroded or loose electrical connections
- Failed engine control module (ECM)
Related parts
- Catalytic Converter: A catalytic converter is a device that converts toxic gases and pollutants to less harmful pollutants. Problems lead to harmful emissions out of limit, rotten egg smell from exhaust & reduced speed
Possible solutions
- Replace the catalyst temperature sensor
- Check and repair any damaged wiring or connections
- Tighten or clean any loose or corroded electrical connections
- Replace the engine control module (ECM) if necessary
Free on OBD DashX
P0426 on OBD DashX
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