P0054Low SeverityEmissions

HO2S Heater Resistance (Bank 1, Sensor 2)

What This Means

The downstream oxygen sensor heater resistance on bank 1 is not within specification. The heater is drawing more or less current than expected.

Common Symptoms

Check engine light on
No performance symptoms
Higher emissions
Emissions test failure

Common Causes

Degraded heater element
High resistance connections
Corroded pins
Wiring resistance
Sensor age

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.