OBD-II code · Powertrain (generic)
P046B Catalyst Temperature Sensor 1/2 Correlation (Bank 2)
Catalyst temperature sensors 1 and 2 on bank 2 disagree by more than the allowed tolerance over a drive cycle.
Is it safe to drive with P046B?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyOne sensor drifts
Symptoms
- Check engine light on
- Failed emissions inspection
- Possibly slightly increased fuel consumption
- Sulfur (rotten egg) smell from exhaust under load
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–2.5 h
- Emissions test
- Likely to fail
- Parts involved
- Exhaust Temperature Sensor
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.