P046B
Catalyst Temperature Sensor 1/2 Correlation
Catalyst temperature sensors 1 and 2 on bank 2 disagree by more than the allowed tolerance over a drive cycle.
Catalyst temperature sensors 1 and 2 on bank 2 disagree by more than the allowed tolerance over a drive cycle.
Common causes
- high
One sensor drifts
One of the most commonly reported causes for this code — check this first.
Typical part cost: $70-660
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First things to check
- 1Confirm the code with a scan tool and check for additional related codes.
- 2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.
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Related codes
See related trouble codes
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Frequently asked questions
What does P046B mean?
P046B means "Catalyst Temperature Sensor 1/2 Correlation (Bank 2)". It is a generic OBD-II code that points to a fault in the auxiliary emission controls.
What are the most common causes of P046B?
one sensor drifts — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.
Can I keep driving with this code?
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical. Use the Wrenchify app for a full diagnosis specific to your vehicle.
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