P0426
Catalyst Temperature Sensor Circuit Range/Performance Bank 1 Sensor 1
P0426 is an OBD-II diagnostic trouble code meaning: Catalyst Temperature Sensor Circuit Range/Performance Bank 1 Sensor 1. Common causes: faulty catalyst temperature sensor, open or short circuit in wiring harness. Estimated repair cost: $22–56.
Symptoms
- Check Engine light comes on
- Reduced engine power
- Increased fuel consumption
- Unstable engine operation
Causes
- Faulty catalyst temperature sensor
- Open or short circuit in wiring harness
- Poor contact in the sensor connector
- Catalytic converter fault com.conob
- Problems in the ECU
How to Fix
- Checking the condition of the catalyst temperature sensor
- Checking the integrity of the wiring harness
- Checking connector connections and contacts
- ECU flashing
- Replacing the catalyst temperature sensor, if required
- Diagnostics of the catalytic converter
Related codes
Error P0426 by Vehicle Brand
FAQ
What does the P0426 code mean?
P0426 is an OBD-II diagnostic trouble code that indicates: Catalyst Temperature Sensor Circuit Range/Performance Bank 1 Sensor 1
What causes a P0426 error code?
The most common causes of P0426 include: Faulty catalyst temperature sensor; Open or short circuit in wiring harness; Poor contact in the sensor connector; Catalytic converter fault com.conob.
How do I fix a P0426 diagnostic trouble code?
To fix P0426: Checking the condition of the catalyst temperature sensor. Checking the integrity of the wiring harness. Checking connector connections and contacts. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0426?
Limited driving only, diagnose soon
How much does it cost to fix P0426?
The estimated repair cost for P0426 is $22–56. Actual cost depends on your vehicle, location, and labor rates.
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