P1101 on Chevrolet
Intake Airflow System Performance
P1101 on Chevrolet vehicles indicates intake airflow system performance. Au7o has documented this code across 1 Chevrolet model — most commonly on Sonic. This manufacturer-related code (common on GM engines) means the intake airflow system is not performing within expected limits. The computer cross-checks the mass airflow (MAF) sensor reading against other inputs like throttle position and manifold pressure, and the values don't agree, suggesting metered airflow is wrong or air is getting in unmeasured. It often appears alongside lean-condition codes. Symptoms can include rough idle, hesitation, reduced power, and a check engine light. Typical repair costs on Chevrolet range from $150 to $500, depending on the specific model and root cause.
Common Causes of P1101
- •Dirty or failing mass airflow (MAF) sensor
- •Unmetered air/vacuum leak (intake duct, hose, or gasket)
- •Loose or cracked air intake tube/boot
- •Dirty or clogged air filter
- •Faulty PCV system or hose
- •Throttle body issues or carbon buildup
- •Faulty manifold absolute pressure (MAP) sensor
- •Wiring/connector problems at the MAF sensor
P1101 on Chevrolet by Model
Chevrolet Sonic(1 issue)
- 1.4L Turbo PCV Valve Cover Diaphragm Failure2012-2020
The 1.4L turbocharged Ecotec engine in the Sonic shares the notorious PCV system failure with the Chevrolet Cruze. The PCV regulator diaphragm integrated into the valve cover ruptures, causing massive vacuum leaks. Additionally, the intake manifold check valve (small red/orange valve) fails, compounding the issue. This affects virtually all 1.4T Sonics eventually, typically between 50,000-100,000 miles.
Looking for P1101 on a different make?
View P1101 across all makes →Frequently Asked Questions
What does P1101 mean on Chevrolet?▼
P1101 stands for "Intake Airflow System Performance." This manufacturer-related code (common on GM engines) means the intake airflow system is not performing within expected limits. The computer cross-checks the mass airflow (MAF) sensor reading against other inputs like throttle position and manifold pressure, and the values don't agree, suggesting metered airflow is wrong or air is getting in unmeasured. It often appears alongside lean-condition codes. Symptoms can include rough idle, hesitation, reduced power, and a check engine light. On Chevrolet specifically, this code is documented across 1 model.
What causes P1101 on Chevrolet vehicles?▼
Common causes on Chevrolet: Dirty or failing mass airflow (MAF) sensor, Unmetered air/vacuum leak (intake duct, hose, or gasket), Loose or cracked air intake tube/boot, Dirty or clogged air filter, Faulty PCV system or hose. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P1101 on a Chevrolet?▼
Repair costs on Chevrolet range from $150 to $500, depending on the specific model and root cause.
Which Chevrolet models have P1101 documented?▼
Au7o has documented P1101 on 1 Chevrolet model: Sonic.