P0101 on Chevrolet
Mass or Volume Air Flow Sensor Circuit Range/Performance
P0101 on Chevrolet vehicles indicates mass or volume air flow sensor circuit range/performance. Au7o has documented this code across 1 Chevrolet model — most commonly on Equinox. This powertrain code means the mass air flow (MAF) sensor's reading is out of the expected range or not changing as it should compared to other engine data. The MAF sensor measures how much air enters the engine so the computer can calculate the correct fuel amount. When the reported airflow doesn't match expectations, the air-fuel mixture can be off, causing rough running, hesitation, stalling, or poor fuel economy. It is usually not an emergency but should be fixed for proper performance and emissions. Typical repair costs on Chevrolet range from $1,000 to $2,500, depending on the specific model and root cause.
Common Causes of P0101
- •Dirty or contaminated MAF sensor element
- •Vacuum/intake air leak (unmetered air after the sensor)
- •Loose, cracked, or torn intake air ducting
- •Dirty or clogged air filter
- •Faulty MAF sensor
- •Wiring or connector problems at the MAF sensor
P0101 on Chevrolet by Model
Chevrolet Equinox(1 issue)
- 1.5L turbo coolant loss / overheating (head gasket & intercooler condensation)2018-2021
The 1.5L turbo (LYX) in 2018+ Equinox is reported to lose coolant with no obvious external leak, leading to overheating and, in some cases, head-gasket failure (coolant entering the combustion chamber). Owners describe the coolant level dropping over time with overheating events. Separately, the early 1.5L turbo had an intercooler/charge-pipe condensation problem in very cold climates where moisture freezes and blocks airflow, triggering reduced-power conditions; GM updated the intercooler and charge-pipe design on later builds.
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View P0101 across all makes →Frequently Asked Questions
What does P0101 mean on Chevrolet?▼
P0101 stands for "Mass or Volume Air Flow Sensor Circuit Range/Performance." This powertrain code means the mass air flow (MAF) sensor's reading is out of the expected range or not changing as it should compared to other engine data. The MAF sensor measures how much air enters the engine so the computer can calculate the correct fuel amount. When the reported airflow doesn't match expectations, the air-fuel mixture can be off, causing rough running, hesitation, stalling, or poor fuel economy. It is usually not an emergency but should be fixed for proper performance and emissions. On Chevrolet specifically, this code is documented across 1 model.
What causes P0101 on Chevrolet vehicles?▼
Common causes on Chevrolet: Dirty or contaminated MAF sensor element, Vacuum/intake air leak (unmetered air after the sensor), Loose, cracked, or torn intake air ducting, Dirty or clogged air filter, Faulty MAF sensor. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0101 on a Chevrolet?▼
Repair costs on Chevrolet range from $1,000 to $2,500, depending on the specific model and root cause.
Which Chevrolet models have P0101 documented?▼
Au7o has documented P0101 on 1 Chevrolet model: Equinox.