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P1100 is a diagnostic trouble code (DTC) for "Mass Airflow Sensor Intermittent". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.
A P1100 trouble code is stored when the Powertrain Control Module (PCM) detects a Mass Air Flow (MAF) sensor signal that falls above or below the manufacturer calibrated limits. Some other, related trouble codes that might appear alongside a P1100 trouble code include a P1101, P1102, P1103, and P1104 code.
The MAF sensor measures the volume and density of the air entering the engine. This data is used by the PCM to calculate the correct fuel to air mixture so that the engine can operate efficiently while in operation. When the PCM detects a variance in the voltage from the MAF sensor that falls outside of manufacturer's specifications, a P1100 trouble code is stored and the Check Engine light illuminates.
Some causes of a P1100 trouble code include a dirty or faulty MAF sensor, a dirty MAF sensor wire. An air leak before or after the MAF sensor can also cause the storage of this code. A short in the MAF sensor harness can also cause a P01100 trouble code.
Some common symptoms of a P1100 trouble code include trouble stahiccupping vehicle, vehicle stalling, hesitation under load, rough idling, and hiccuping by the engine. In addition, the vehicle can suffer from reduced fuel efficiency.
To diagnose a P1100 trouble code, a mechanic needs to have an advanced scanner, an oscilloscope, and a digital volt/ohm meter. In addition, they should perform the following steps:
Mechanics often make the mistake when diagnosing a P1100 trouble code of replacing the MAF sensor without first checking if there is faulty or damaged wiring within the MAF sensor wiring harness. The result is that the problem remains unfixed and the code returns.
While a P1100 trouble code may not prevent a vehicle from operating, drivers can expect a reduction in the fuel efficiency of the vehicle in situations where the engine is running too rich. It is best to get a P1100 trouble code diagnosed and fixed as soon as possible to avoid the stalling and hard start conditions that often accompany the code storage.
To repair a P1100 trouble code, the mechanic needs to perform the following:
Mechanics should keep in mind when removing the MAF sensor to take care not to touch the wires connected to the MAF sensor. While the wires cannot electrocute the mechanic, these wires are delicate and easily broken.
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