P1101 is a diagnostic trouble code (DTC) defined as “Mass Airflow Sensor Out of Self Test Range.”
Your vehicle’s mass air flow sensor or MAF sensor measures the amount of air entering the internal combustion chamber while the engine is running.
When the vehicle’s ignition key is on and the engine is off, the desired airflow voltage from the MAF sensor should be higher than 0.27 volt (typically.) Likewise, when the key is on and the engine is running at normal operating temperature, the air flow or air intake voltage should be between 0.46 and 2.44 volts.
Your vehicle’s Powertrain Control Module (PCM) regularly checks this voltage and the functioning of the mass airflow sensor by conducting a self-diagnostic test called the Key On Engine Running test (KOER test.)
During this test, if the PCM detects any discrepancy in the voltage range, it registers the P1101 code and activates the Check Engine Light.
This DTC code is a generic error code that applies to all vehicles manufactured since 1996 and equipped with an OBD-II system. It’s also a pretty common issue that the Chevy Cruze and some other vehicle models face.
Besides an illuminated Check Engine Light, the P1101 code is often accompanied by several symptoms, mostly related to drivability issues.
Some of the common signs are:
While the P1101 error code will not stop you from driving your vehicle, you may experience several performance issues such as engine running rough, loss of power, and poor fuel economy.
That said, driving your vehicle for a prolonged period with an active P1101 code is not recommended. The P1101 code can make your engine run rich, consuming more fuel than usual. This could strain your engine’s internal components and lead to further damage.
It’s best to get your vehicle inspected at certified repair shops as soon as you see the Check Engine Light illuminated for the P1101 code.
Multiple conditions could cause your PCM to register code P1101.
Some of the common causes include:
To diagnose the P1101 code accurately, you’ll require an OBD-II scan tool and a digital volt/ohm meter.
Whether you own a Chevy Cruze or a General Motors vehicle, here’s a general guideline on how mechanics at repair shops will proceed with the treatment of this error code:
They’ll clear the P1101 code and test drive your vehicle to ensure this trouble code doesn’t return after all necessary fixes are done.
Here are some of the possible repairs for the P1101 trouble code:
Here are the estimated costs for each treatment related to the P1101 fault code:
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