P0435
Catalyst Temperature Sensor Circuit Bank 2 Sensor 1
Catalyst / emissions
Generic OBD-II
Medium
What it means
P0435 means the bank 2, sensor 1 catalyst temperature sensor circuit is out of range. This sensor lets the computer monitor catalytic-converter temperature for emissions control, so a fault mainly sets the light and can cause an emissions-test failure — the engine runs normally. The usual causes are the sensor, its wiring, or the connector.
Medium
Can I keep driving? Drivable — this is an emissions monitoring sensor, so the engine runs normally, but you may fail an emissions/readiness test.
Common symptoms
What you'll notice
- Check-engine light on
- Usually no change in how the car drives
- May fail an emissions/readiness test
Common causes
Most likely first
- Faulty catalyst temperature sensor (bank 2, sensor 1)Likely
- Open, shorted, or corroded wiring in the sensor circuitCommon
- Loose or damaged connector at the sensorCommon
- Poor sensor groundLess often
- ECM fault (rare)Less often
How to diagnose & fix
Work through it in order
- Inspect the bank 2 catalyst temperature sensor connector and wiring for damage or corrosion.
- Check the sensor's supply and ground.
- Compare the sensor reading to spec at known temperatures on a scan tool.
- Replace the catalyst temperature sensor if it is out of range, then clear and re-test.
FAQ
Quick answers
Is it safe to drive with P0435?+
Yes — it monitors catalyst temperature and doesn't affect how the engine runs. The main downside is a possible emissions-test failure.
Can I just clear P0435?+
It returns while the wiring or sensor fault remains. Repair the circuit first.
Related codes
Often seen with P0435
Read & clear P0435 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX