P2628moderate severityPowertrain
O2 Sensor Pumping Current Trim Circuit High Bank 1 Sensor 1
on 2003 Mazda B2300 2.3L I4 · FWD
What this code means
High current in wideband O2 sensor trim circuit bank 1.
Symptoms
- Check engine light
- Lean running condition
Common causes
- Open circuit
- Failed sensor
- Short to voltage
Diagnostic steps
- Measure circuit current
- Check for opens
Repair notes
Replace sensor or repair wiring.
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