Question 1

What does P0030 mean?

Accepted Answer

P0030 - O2 Sensor Heater Control Circuit (Bank 1 Sensor 1). The heater element in the upstream oxygen sensor on bank 1 has an electrical problem.

Question 2

What are the symptoms of P0030?

Accepted Answer

Check engine light, Slightly poor cold-start performance, No major drivability issues

Question 3

What causes P0030?

Accepted Answer

Failed O2 sensor heater element, Blown O2 heater fuse, Wiring open/short, Corroded connector, PCM driver failure

Question 4

How much does it cost to fix P0030?

Accepted Answer

Typical repair cost: $100-$300. Check the fuse first — a blown O2 heater fuse is free to diagnose and cheap to fix.

P0030 — O2 Sensor Heater Control Circuit (Bank 1 Sensor 1)

Don't guess — diagnose P0030 the right way