1. What does the $7e9 code mean?
Most common error codes you can encounter are $7e8 and $7e9: the first one is related to an engine issue, $7e9 to a transmission issue.
Those are two menus that include different kinds of issues that you can read using an OBD2.
On-Board Diagnostics (OBD2) is a self-diagnostic automotive electronic system, indicating and reporting possible problems within the vehicle.
The OBD2 port can be used to collect lots of insightful data and provide the driver/user with additional features.
Related to the $7e8 and $7e9 menu, you can find several 7Ex submenus that are not engine codes.
7EA, 7EB, 7EC, 7ED, 7EE, 7EF refer to the communication CAN identifier. Some OBD2 code readers use these codes when it needs more info.
If your are willing to use an OBD2 reader, please take note of those first digit structures:
# Pxxxx for powertrain
# Bxxxx for body
# Cxxxx for chassis
# Uxxxx for future systems
Second digit structure is:
# P0xxx Government required codes
# P1xxx Manufacturer codes for additional emission system function; not required but reported to the government
Third digit structure is:
# Px1xx measurement of air and fuel
# Px2xx measurement of air and fuel
# Px3xx ignition system
# Px4xx additional emission control
# Px5xx speed and idle regulation
# Px6xx computer and output signals
# Px7xx transmission
# Px8xx transmission
# Px9xx control modules, input and output signals
The fourth and fifth digits designate the individual components and system
Read Also: 7e8 Code for Different Engines
2. What does the $7e9 code mean on Ford?
The following list includes all the issues connected to the $7e9:
P0218 Transmission over temperature
P0613 Transmission control module (TCM)
P0614 ECM/TCM incompatible
P0700 Transmission control system malfunction
P0706 Transmission range sensor circuit range/performance
P0715 Input/turbine speed sensor circuit malfunction
P0720 Output speed sensor circuit malfunction
P0729-P0736 Gear ratio problems
3. What does the $7e9 code mean on Volkswagen?
The following list includes all the issues connected to the $7e9:
P1764 Transmission temperature control
P1841 Engine/Transmission Control Modules Versions do not match
P1583 Transmission mount valves Short to B+
P1584 Transmission mount valves Short to ground
P1585 Transmission mount valves Open circuit
P1652 Please check DTC Memory of transmission ECU
P1790 Transmission Range Display Circ. Open
P1791 Transmission Range Display Circ. Short to Ground
P1792 Transmission Range Display Circ. Short to B+
P1849 Please check DTC Memory of transmission ECU
Read Also: Check Engine Light Flashing
4. What does the $7e9 code mean on BMW?
The following list includes all the issues connected to the $7e9:
P1611 Serial Communication Link Transmission Control Module
P1746 Transmission Control Module Output Stage
P1748 Transmission Control Module Self Test
P0218 Transmission Over Temperature Condition
P0700 Transmission Control System Malfunction
P0701 Transmission Control System Range/Performance
P0702 Transmission Control System Electrical
P0705 Transmission Range Sensor Circuit malfunction (PRNDL Input)
P0706 Transmission Range Sensor Circuit Range/Performance
P0707 Transmission Range Sensor Circuit Low Input
P0708 Transmission Range Sensor Circuit High Input
P0709 Transmission Range Sensor Circuit Intermittent
p0710 Transmission Fluid Temperature Sensor Circuit Malfunction
P0711 Transmission Fluid Temperature Sensor Circuit Range/Performance
P0712 Transmission Fluid Temperature Sensor Circuit Low Input
P0713 Transmission Fluid Temperature Sensor Circuit High Input
P0714 Transmission Fluid Temperature Sensor Circuit Intermittent
U0302 Software Incompatibility with Transmission Control Module
U0402 Invalid Data Received From Transmission Control Module
Read to know: Fix Check Engine Light Gas Cap
5. What does the $7e9 code mean on Hyundai?
The following list includes all the issues connected to the $7e9:
P0218 Transmission Fluid Over temperature
P0700 Transmission Control System Malfunction
P0701 Transmission Control System Range/Performance
P0702 Transmission Control System Electrical
P0707 Transmission Range Sensor Circuit Low Input
P0708 Transmission Range Sensor Circuit High Input
P0709 Transmission Range Sensor Circuit Intermittent
P0710 Transmission Fluid Temperature Sensor Circuit Malfunction
P0711 TFT Sensor Circuit Range/Performance
P0712 Transmission Fluid Temperature (TFT) Sensor Circuit Low Input
P0713 Transmission Fluid Temperature (TFT) Sensor Circuit High Input
P0714 Transmission Fluid Temperature Sensor Circuit Intermittent
P0894 Transmission Component Slipping
P0897 PCM detects a calculated transmission fluid life of 10%or less
P1520 Transmission Range Switch Circuit
P1521 Transmission Engaged at High Throttle
P1527 Transmission Range to Pressure Switch Correlation
P1623 Transmission Temp Pull-Up Resistor
P1700 Transmission Control Module (TCM) Requested MIL Illumination
P1790 Transmission Control Module Checksum
P1791 Transmission Control Module Loop
P1791 Throttle/Pedal Position Signal (2000+)
P1792 Transmission Control Module Reprogrammable Memory
P1792 ECM to TCM Engine Coolant Signal
P1793 Transmission Control Module Stack
P1812 Transmission Over Temperature Condition
P1815 Transmission Range Switch – Start In
P1868 Transmission Fluid Life
P1870 Transmission Component Slipping
Read to solve: How Toyota VSC Reset Light
6. What does the $7e9 code mean on Ford Fusion?
The following list includes all the issues connected to the $7e9:
P0218 Transmission Over Temperature Condition
P0700 Transmission Control System Malfunction
P0701 Transmission Control System Range/Performance
P0702 Transmission Control System Electrical
P0703 Torque Converter/Brake Switch B Circuit Malfunction
P0704 Clutch Switch Input Circuit Malfunction
P0705 Transmission Range Sensor Circuit malfunction (PRNDL Input)
P0706 Transmission Range Sensor Circuit Range/Performance
P0707 Transmission Range Sensor Circuit Low Input
P0708 Transmission Range Sensor Circuit High Input
P0709 Transmission Range Sensor Circuit Intermittent
P0710 Transmission Fluid Temperature Sensor Circuit Malfunction
P0711 Transmission Fluid Temperature Sensor Circuit Range/Performance
P0712 Transmission Fluid Temperature Sensor Circuit Low Input
P0713 Transmission Fluid Temperature Sensor Circuit High Input
P0714 Transmission Fluid Temperature Sensor Circuit Intermittent
7. What does the $7e9 code mean on Dodge Ram 1500?
The following list includes all the issues connected to the $7e9:
P0218 Transmission Fluid Over Temperature
P0700 Transmission Control System Malfunction
P0701 Transmission Control System Range/Performance
P0702 Transmission Control System Electrical
P0707 Transmission Range Sensor Circuit Low Input
P0708 Transmission Range Sensor Circuit High Input
P0709 Transmission Range Sensor Circuit Intermittent
P0710 Transmission Fluid Temperature Sensor Circuit Malfunction
P0712 Transmission Fluid Temperature (TFT) Sensor Circuit Low Input
P0713 Transmission Fluid Temperature (TFT) Sensor Circuit High Input
P0714 Transmission Fluid Temperature Sensor Circuit Intermittent
P1520 Transmission Range Switch Circuit
P1521 Transmission Engaged at High Throttle Angle
P1527 Transmission Range to Pressure Switch Correlation
P1623 Transmission Temp Pull-Up Resistor
P1700 Transmission Control Module (TCM) Requested MIL Illumination
P1790 Transmission Control Module Checksum
P1791 Transmission Control Module Loop
P1792 Transmission Control Module Reprogrammable Memory
P1793 Transmission Control Module Stack Overrun
P1868 Transmission Fluid Life
P1870 Transmission Component Slipping
Conclusions
Due to the different issues that are connected with the same $7e9 code, we warmly suggest you to ask the help of a professional mechanic.
DIY approach is still doable, but you need to be pretty handy in dealing with the electronic system of your car.
Furthermore, you need a ODB2 module that could be quite tricky to use for newbies.
