What is the P1103 fault codes? What is the Mass Air Flow (MAF), Sensor in Range but Higher Than Expected description? How do I fix the P1103 fault code What are the causes and symptoms of P1103 fault code
What is the P1103 Fault code? What does it all mean?
A code P1103 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 higher than expected.
The MAF sensor measures the air volume and density entering the engine. Modern MAF sensor designs often use a heating part that generates electricity as the air passes over it. The electric current produced directly correlates with the density of the air passing over the sensor. Because the volume and density air depends on temperature, humidity, pressure and temperature, the PCM can also use information from other sensors in order to calculate the right fuel strategy. To compare the MAF sensor with the PCM, it also uses data from the throttle position sensor. The MAF sensor requires that the airflow must remain within a specified range at a given engine speed. A PCM that cannot compensate for excess airflow rates will not be able to maintain the stoichiometric fuel-air mixture. The PCM has limited ability to affect the fuel injectors. The fuel mixture will become lean if there is too much air in the engine.
To prevent a lean mixture condition, the PCM closely monitors MAF sensor to ensure it is not harmed. The PCM will assign fault code P1103 to the sensor if the voltage signal exceeds the preset maximum allowable threshold. In other words, it is an early warning sign.
Vehicles susceptible to P1103 fault code include but aren’t 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 P1103 meanings. This code has different diagnostic and repair procedures.
What are the Possible Causes for P1103 Fault Codes?
Below are some reasons to set fault code P1103:
- – Broken, melted or shorted wires and/or connectors
- – Extremely oily MAF sensor
- – Vacuum leaks either before or after the MAF sensors
- Air intake restrictions
- – MAF sensor circuit poor electrical connection
- – Air filter that is extremely dirty or blocked
- – MAF sensor misplaced or defective
- – Defective, unsuitable, or faulty intake temperature (IAT) sensor
- – The PCM is not functioning properly or the software needs to be updated (rarely).
What are the symptoms of the P1103 Fault Code?
These symptoms may be present if you own a vehicle that has the code “P1103”.
- – Illumination at the check engine lights
- – Hard starting the engine
- – Acceleration loss of power
- – Engine hesitation caused by reduced throttle response
- – Idling fluctuations, engine stalling
- – Deterioration in the air-fuel mixture
- – Increased fuel use
How to Fix the P1103 Fault Code
There are several repairs that can resolve the P1103 fault code:
- Replace all defective wires, connectors and components in the MAF sensor Harness.
- Use a special spray to clean the MAF sensor.
- – Replacing a faulty 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 that connect to the MAF sensor can easily break and are extremely sensitive.
How Serious Is the P1103 Fault Code
The code P1103 is most likely to affect your vehicle’s fuel economy, power output, and throttle response. It can also cause engine hesitation or stalling. This code does not cause any safety problems and should not be considered serious. It can cause inconvenience for the driver, as it could affect the driving experience. It is important to diagnose the problem immediately and fix it as soon as possible.
