P0030Low SeverityEmissions

HO2S Heater Control Circuit (Bank 1, Sensor 1)

What This Means

The heated oxygen sensor heater control circuit on bank 1, sensor 1 has a malfunction. The heater helps the O2 sensor reach optimal temperature faster for accurate readings.

Common Symptoms

Check engine light on
Slightly increased emissions
Minor fuel economy impact
Longer warm-up enrichment

Common Causes

Failed O2 sensor heater
Blown fuse
Wiring damage
PCM driver failure
Corroded connector

Estimated Repair Cost

$100 – $350

Parts and labor (varies by vehicle and location)

Difficulty:Easy

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For informational purposes only. Diagnostic trouble codes are starting points for diagnosis, not definitive answers. Always consult a certified mechanic for proper diagnosis and repair. Estimated costs vary by vehicle, location, and shop rates.