What is the p115e Ford fault?
3 Answers
p115e Ford refers to a fault that occurs when the powertrain control module has reached the maximum allowable correction range. Causes of powertrain control module failure: Excessive carbon deposits in the intake system and at the root of the intake valve, resulting in an excessively lean air-fuel mixture during cold starts; severe dirt on the throttle body, leading to insufficient air intake; the starter motor's speed does not meet the required level. Functions of the powertrain control module: The powertrain control module can provide users with various services, including digital data leased line services with rates ranging from 2M to 155M, as well as other services such as voice, image transmission, and distance learning. It is particularly suitable for users who require high data transmission rates and greater bandwidth.
When I worked at a car dealership, I dealt with quite a few Ford vehicles showing the P115E trouble code. This code usually indicates a mismatch between the data from the Manifold Absolute Pressure (MAP) sensor and the Mass Air Flow (MAF) sensor—it's like two partners not communicating well at work. Common causes include excessive dirt buildup on the sensors, loose or corroded connectors, aging wiring, or minor faults in the engine control unit. Symptom-wise, your car might experience rough idling, a sudden increase in fuel consumption, or difficulty during acceleration. I suggest first checking the sensor location yourself—it's under the hood near the air filter box—unplug the connector and clean off any dirt. If that doesn’t help, it’s best to take it to a professional shop to inspect the wiring and replace the sensor if necessary. After resetting the trouble code, the car should drive much smoother. Regular maintenance, like cleaning these areas periodically, can prevent a lot of headaches down the road.
My Ford Focus threw a P115E trouble code last year, which gave me headaches for a whole week. At that time, the car's idle speed fluctuated up and down after starting, and it was wasting fuel. After checking, I found this fault was caused by a coordination issue between the air pressure sensor and mass airflow sensor, leading the ECU to miscalculate the air-fuel mixture ratio. The cause could be as simple as a loose wiring harness connector or as complex as a faulty sensor itself. I decided to DIY: first followed online tutorials to clean dust around the MAF sensor, but no improvement; then spent a small amount to replace the MAP sensor. After reinstalling and restarting, the check engine light went off. The whole process saved me a trip to the repair shop. A reminder for fellow DIYers: be careful not to mix up parts – Ford's sensor locations are quite visible. It's been half a year since the fix, everything runs normally and fuel consumption has returned to standard levels.
