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Home › Mazda › 2004 › B2300 Base, Automatic › Repair and Diagnosis › Engine Performance › System › Symptom Troubleshooting [Engine] › Engine OBD II Monitors › Typical Fuel Monitor Malfunction Thresholds:

Typical Fuel Monitor Malfunction Thresholds:

Lean Malfunction: LTFT > 25%, STFT > 5%.
Rich Malfunction: LTFT < 25%, STFT < 10%.