Transmission Range Display Circuit
Table of contents
P0814 MERCEDES-BENZ Possible Causes
- Faulty Transmission Range Display
- Transmission Range Display harness is open or shorted
- Transmission Range Display circuit poor electrical connection
How do I fix code P0814 MERCEDES-BENZ?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Tech Notes
- There is a Factory Service Bulletin for the various Mercedes-Benz models.
- Mercedes-Benz Factory Service Bulletin OBDII Code P0814
Cost of diagnosing the P0814 MERCEDES-BENZ code
The cost of diagnosing the P0814 MERCEDES-BENZ code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P0814 MERCEDES-BENZ Description
The transmission control module on modern vehicles monitors parameters such as transmission fluid temperature, fluid pressure, selector lever position, engine speed, vehicle speed, and load. The module can calculate the correct gear ratio to be selected depending on this data. Actuators are used to allow a smooth gear change. The monitor can also detect when a fault occurs which results in a shifting issue or the incorrect gear ratio being selected. A scan tool can be used to monitor live data on a road test. Occasionally manufacturers will support actuator tests. An oscilloscope can be used to test actuators during an actuator test with a scan tool.