What is the P1102 fault codes? What is the definition of Mass Air Flow Sensor In Range But Lower Than Expected (MAF)? How can I fix P1102 fault codes? What are the symptoms and causes for the P1102 fault code
What is the P1102 fault code? What does it signify?
A code P1102 is set by the powertrain control module (PCM) when the voltage signal from the mass air flow (MAF) sensor is within manufacturer-specified limits but lower than expected.
The MAF sensor measures air volume and quantity entering the engine. This information is sent to the PCM. This data is used by the PCM to adjust fuel injection timing and ignition timing, and calculate the optimal air-fuel combination.
The MAF sensor uses either a hot wire platinum wire or a heating element made of nickel foil, which is powered by an electrical current from the PCM. The nickel foil is heated to a certain degree (about 93°C / 200°F) by a microprocessor inside the sensor. The foil is cooled by the airflow that is drawn into the motor. As the airflow increases the PCM sends more electricity to maintain the temperature. The current change is what allows the PCM detect the amount of air entering an engine and adjusts fuel injection to maintain the correct mixture.
If the voltage signal sent from the MAF sensor to PCM is lower that expected, but still within manufacturer’s limits, a P1102 fault codes will be triggered.
Some vehicles are prone to P1102 fault code. This includes, but is not limited, to various Ford, Jaguar and Lincoln models as well as Mercury, Oldsmobile and Mercedes-Benz models.
Note: Manufacturers may have different definitions and explanations of this code. Some vehicles may have P1102 with other meanings. This code has different diagnostic and repair procedures.
What Are the Possible Causes of the P1102 Fault code?
Below are some reasons to set fault code P1102:
- – Broken, melted or shorted wires and/or connectors
- – Extremely oily, dirty MAF sensor
- – Vacuum leaks either before or after the MAF sensors
- – MAF sensor circuit poor electrical connection
- – Air filter that is extremely dirty or blocked
- – Missing or defective MAF sensor
- – The PCM is not functioning properly or the software needs to be updated (rarely).
What are the symptoms for P1102’s Fault Code?
These symptoms may be present in vehicles with code P1102:
- – Illumination at the check engine lights
- – The engine is difficult to start
- – Acceleration loss of power
- – Reduced throttle response causes engine hesitation
- – Engine stalling and idle fluctuations
- – Deterioration in the air-fuel mixture
- – Higher fuel consumption
How to Fix the P1102 Fault Code
There are several repairs that can resolve the P1102 fault code.
- Replace all faulty wires, connectors or components within the MAF sensor harness.
- Use a special spray to clean the MAF sensor.
- – Replacing the defective MAF sensor
- Repair of engine vacuum leaks
- – Clean or replace the dirty air filter
- – Reprogramming the PCM or replacing it
When removing the MAF sensor to clean it, your mechanic must be careful not damage the wires. The wires connecting the MAF sensors are sensitive and can break easily.
How Serious Is the P1102 Fault Code
The code P1102 can cause a decrease in throttle response, engine hesitation, or stalling. The code does not pose a danger to the vehicle’s safety and is therefore not considered serious. This code can affect the driving experience and cause inconvenience to the driver. The fault should be immediately diagnosed and fixed.
