Severity: Fix within days. Drive with caution and watch for new symptoms.
A manufacturer-specific version of the air-flow problem: the sensor's reading does not match what the computer expects. On GM vehicles this often means the air-flow sensor is dirty or the intake has a leak.
Clean the MAF sensor, check the intake hoses, and test the sensor.
Rough idle and hesitation are common. Drivable with care.
You can drive short distances carefully; watch for worsening symptoms. Rough idle and hesitation are common. Drivable with care.
The most common causes are: Dirty mass air flow sensor; Vacuum leak; Aftermarket intake; Failing MAF sensor. A scan tool and a visual check of the parts above is where a technician starts.
Clean the MAF sensor, check the intake hoses, and test the sensor.
