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Code 48 - Misfire Diagnosis: Notes

NOTE: If multiple codes are present, go to lowest code first. Repairing Code 13, 44 or 45 may correct Code 48.

Code 48 will set if TPS is .58-1.02 volts, RPM is 1500-2500, MPH is 50-60, O2 sensor cross counts are greater than 32 (except 4T60 transmission) or 26 (4T60 transmission), and all of these conditions are met for 30 seconds.

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