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1999 Tahoe 5.7L Misfire Cylinder 1 with P0301 and P0113 OBD2 Codes - Recurring Issue

Model: 1999 Tahoe Fault Code: P0113 Posted: 2015-10-04 14:00

My 1999 Chevrolet Tahoe 5.7L engine is experiencing a recurring misfire in cylinder #1, indicated by OBD2 diagnostic codes P0301 and P0113. The vehicle starts normally but begins to miss under load or at idle. I have cleared the codes multiple times, and the misfire stops temporarily—sometimes lasting only one day before returning. This pattern suggests a persistent underlying issue that may require deeper diagnostics.

Related fault codes
P0113P0301
Comments (4)
Anonymous 2015-10-04 14:13

Clearing the codes can result in temporary improvement, but it does not resolve the root cause. The vehicle may run fine for a day or two before symptoms return.

Anonymous 2015-10-04 14:17

I replaced the intake air temperature (IAT) sensor, but the problem persisted—no improvement in misfire or code readings.

Anonymous 2015-10-04 15:43

Do not clear diagnostic codes unnecessarily—this erases important data for troubleshooting. P0113 indicates a circuit fault related to the intake air temperature sensor. For more details, refer to OBD2 code P0113 at obd-codes.com/p0113. P0301 specifically points to a misfire in cylinder #1. See official reference: obd-codes.com/p0301.

Anonymous 2015-10-04 17:53

That explanation was very helpful and provides clear direction for further diagnosis.