Definition of Code P0860

Code P0860 is a generic powertrain code related to the transmission, including pressure faults and sensor failures. In this case, the Engine Control Module (ECM) has detected a fault in the shift module communication circuit.

What Does Code P0860 Mean

A P0860 code will be stored when the ECM has found a fault or error in the shift module communication circuit.

Note, the P0860 code will only apply to vehicles equipped with an electronic traction control system.

The shift module communication circuit sends information via the vehicle’s control network (CAN) to the ECM, in addition to other controllers, to help calculate the vehicle’s efficient operation. The CAN is a communication bus that helps different vehicle modules communicate with each other. The shift module helps the vehicle determine the correct shift timing.

What Causes Code P0860?

Several issues can cause a P0860 code, including:

Damaged, open, or short-circuited wiring or connectors and related components
Damaged or faulty manual lever position sensor
Excessive moisture levels in the shift module sensor connector

What Are the Symptoms of Code P0860?

Symptoms of a P0860 code may include:

• Check engine or warning light may illuminate
• Traction control malfunction light may flash or stay on
• Reduced fuel economy
• The vehicle may lack traction in slippery road conditions
• The vehicle may shift roughly
• The vehicle may not shift into gear or out of gear
• The vehicle may enter “limp” mode

How Does a Mechanic Diagnose Code P0860?

A mechanic can use several methods to diagnose a P0860 fault code, including:

Using an OBD-II scanner to check for a stored P0860 fault code
Visually inspecting all wiring and connectors related to the shift module for possible damage or corrosion
Using a specialized tool (such as an Autohex) to help locate the error or malfunction
Using a memory saver device to store the memory of other modules during reprogramming
Using a diagnostic CAN scanner to view pin values and operating control modules
Testing the ground circuits of the control module for continuity with the battery ground
Checking for loose or corroded electrical connectors that could increase circuit resistance

Common Mistakes When Diagnosing Code P0860

Sometimes the shift module is incorrectly identified as the cause of the P0860 code, when the actual problem is in the electrical wiring or with a switch or sensor. It is recommended to fully diagnose any error or fault code before performing repairs.

How Severe Is Code P0860?

Since safely operating a vehicle will most likely be affected due to faults that store a P0860 code, this code is considered a potentially serious one. When this code appears, it is recommended to bring your vehicle to your local service center or a mechanic immediately for repair and diagnosis.

What Repairs Can Fix Code P0860?

Several repairs can correct a P0860 fault code and include:

Repairing any damaged, open, or corroded wiring, connectors, and related components
Replacing the damaged or faulty shift lever
Replacing the damaged or faulty shift module
Clearing all codes, testing the vehicle, and rescanning to see if any codes reappear

P085E Possible Causes

Faulty shift control module “B”
Shift control module “B” circuit is open or shorted
Poor electrical connection in shift control module B circuit

What Does It Mean?

How to Fix Code P085E

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 pins.

P085E Possible Symptoms

Illuminated engine light (or service engine soon warning light)

P085E Meaning

The engine control module (ECM) monitors the shift control module. The ECM sets the OBDII code when there is a communication problem with the shift control module.

What does a P0860 OBD II code mean?

The P0860 code is a generic powertrain code related to the transmission, including pressure errors and sensor issues. This specific code usually occurs when a fault in the gear shift module communication circuit is detected by the engine control module (ECM).

What causes it?

• Wires or connectors have been damaged, open, and/or short-circuited.
• A damaged manual lever position sensor
• Moisture has accumulated to an excessively high level in the gear shift module sensor connector

What are the symptoms of code P0860?

• An engine or warning light may illuminate on your dashboard
• Reduced fuel economy
• Lack of traction in slippery conditions
• Difficulty shifting into or out of any gear
• The traction control light may be on and/or flashing.

How can you fix this issue?

• Repair any damaged, open, or corroded wiring, connectors, and related components
• Replace the damaged or faulty gear shift lever and/or gear shift module

Does code P0860 mean problems? Is it serious?

If this specific OBD-II code is detected after scanning your system, it is considered a code that should be taken seriously as it can potentially endanger yourself and other drivers on the road. Our recommendation is to schedule a check engine light inspection with a licensed Fiix mechanic and have it addressed.

P0861 Possible Causes

    Faulty Shift Control Module “A”
    Shift Control Module “A” harness is open or shorted
    Poor electrical connection in Shift Control Module A circuit

What Does It Mean?

First diagnose the P0861 code

    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 pins.

P0861 Possible Symptoms

    Check Engine Light illuminated (or Service Engine Soon warning light)

P0861 Description

The Engine Control Module (ECM) monitors the Shift Control Module. The ECM sets the OBDII code when there is a communication problem with the Shift Control Module.

How serious is the code?

A P0862 diagnostic code is quite serious, as it means the computer cannot communicate with the necessary sensors and control modules. Needless to say, this will affect driving and, eventually, your vehicle’s safety.

Symptoms

Symptoms of a P0862 include:

• Anti-lock brake system warning light
• Hard shifting
• Transmission won’t engage in drive or reverse
• Limp mode

Causes

1. Damage to wiring and/or connectors
2. Faulty manual lever position sensor
3. Damaged or broken shift assembly

How to diagnose the code?

When trying to determine what’s causing a P0862 OBDII trouble code, the wiring and connectors on the transmission wiring harness are usually checked first. If nothing appears wrong, then the manual lever position sensor, and possibly the shift lever, should be considered.

What repairs will fix P0862?

1. Repair or replace damaged wiring on the transmission wiring harness
2. Replace or repair broken/corroded connectors
3. Replace the transmission control module

What does P0863 mean?

This diagnostic trouble code (DTC) is a generic powertrain code and applies to many OBD-II vehicles (1996-newer). This may include, but is not limited to, Dodge, Honda, Volkswagen, Ford vehicles, etc. Although generic, the exact repair steps may vary depending on the year, make, model, and powertrain configuration.

If your vehicle has stored a P0863 code, accompanied by a malfunction indicator lamp (MIL), it means that the powertrain control module (PCM) has detected an abnormal electrical condition in the transmission control module (TCM) communication circuit.

While some transmission control modules (for OBD-II equipped vehicles) are integrated into the PCM, most are standalone components. TCM-related codes may also be stored as P codes, B codes, or even U codes, depending on the vehicle’s make and model. If a P0863 code is stored, it is likely that other PCM and/or TCM codes are also stored. Anti-lock braking system (ABS) codes may also be recorded.

The electronic transmission control systems of OBD-II equipped vehicles are managed using a network of computers (called control modules). This involves constant communication between the various control modules via the controller area network (CAN).

The PCM uses input signals from several engine and transmission sensors to calculate the automatic shift strategy. A high-pressure pump (inside the transmission) forces fluid through the valve body and into the cam assembly; in addition to lubricating and cooling the transmission. The high-pressure fluid allows the clutches to momentarily disengage from the sprag so that the gear ratio can be smoothly changed. One or more electronic pressure control (EPC) solenoids help regulate the fluid pressure.

Electronic pressure (EP) sensors provide the PCM with relevant data regarding fluid pressure at different points in the transmission.

Electronic shift solenoids are used to interrupt the flow of high-pressure fluid so that the transmission shifts when commanded. The PCM uses voltage input signals from the transmission input speed sensor and the transmission output speed sensor to determine if the transmission is shifting effectively.

As with many other automatic transmission malfunctions, a transmission control system code can be caused by an electrical or mechanical failure. If the PCM detects a malfunction that requires the MIL to illuminate, a P0863 code will be stored and the MIL may be turned on.

How severe is this DTC?

If this code is stored, you may have noticed that your transmission is shifting much harder than normal. If your vehicle has displayed a P0863 code, it should be diagnosed as soon as possible.

What are some of the symptoms of the code?

Symptoms of a P0863 trouble code may include:

• Irregular transmission shifting patterns
• Transmission failure to shift
• Reduced fuel efficiency
• Transmission slipping
• Delayed transmission engagement
• Other transmission-related codes
• ABS disabled

What are some common causes of the code?

Causes of this code may include:

• Transmission sensor failure
• Vehicle speed sensor failure
• Open or shorted circuits in the CAN harness
• Mechanical transmission failure
• Defective TCM, PCM, or programming error

What are the troubleshooting steps for P0863?

You will need a diagnostic scanner, a digital volt/ohmmeter (DVOM), and a reliable source of vehicle information to accurately diagnose a P0863 code. An oscilloscope may also prove very useful for diagnosing various sensor outputs.

You can save time by searching for technical service bulletins (TSBs) that match the stored code, the vehicle (year, make, model, and engine), and the symptoms presented. This information can be found in your vehicle information source. If you find the right TSB, it might provide a quick solution to your diagnosis.

After connecting the scanner to the vehicle’s diagnostic port and retrieving all stored codes and relevant freeze frame data, note the information (in case the code proves to be intermittent). After that, clear the codes and test-drive the vehicle until one of two things happens; the code is restored or the PCM enters readiness mode.

The code may be more difficult to diagnose if the PCM enters readiness mode at this point, as the code is intermittent. The condition that caused the P0863 to be stored may need to worsen before an accurate diagnosis can be made. If the code is restored, proceed with the diagnosis.

You can obtain connector face views, connector pinout charts, component location diagrams, wiring diagrams, and diagnostic flowcharts (related to the code and the vehicle in question) using your vehicle information source.

Perform a visual inspection of the associated wiring and connectors. Repair or replace any wiring that is cut, burned, or damaged.

Use the DVOM to test the voltage and ground circuits at the TCM and/or PCM. If no voltage is detected, check the system fuses. Replace any blown or defective fuses as needed and retest.

If voltage and ground are detected at the TCM, test the corresponding circuit at the PCM connector. If no voltage is detected there, suspect an open circuit between the component in question and the PCM. If voltage is found there, suspect a defective TCM, PCM, or a programming error.

Most communication error codes can be attributed to a programming issue.

What does P0864 mean?

This diagnostic trouble code (DTC) is a generic powertrain code and applies to many OBD-II vehicles (1996-newer). This may include, but is not limited to, Dodge, Honda, Volkswagen, Ford vehicles, etc. Although generic, the exact repair steps may vary depending on the year, make, model, and powertrain configuration.

If your vehicle has stored a P0864 code, accompanied by a malfunction indicator light (MIL), it means that the powertrain control module (PCM) has detected a problem in the range or performance of the transmission control module (TCM) communication circuit.

While some transmission control modules (for OBD-II equipped vehicles) are integrated into the PCM, most are standalone components. TCM-related codes may also be stored as P codes, B codes, or even U codes, depending on the vehicle’s make and model. If a P0864 code is stored, it is highly likely that other PCM and/or TCM codes are also stored. Anti-lock braking system (ABS) codes may also be recorded.

The electronic transmission control systems of OBD-II equipped vehicles are managed using a network of computers (called control modules). This involves constant communication between the various control modules via the controller area network (CAN).

The PCM uses input signals from multiple engine and transmission sensors to calculate the automatic shift strategy. A high-pressure pump (inside the transmission) forces fluid through the valve body and into the cam assembly; in addition to lubricating and cooling the transmission. The high-pressure fluid allows the clutches to momentarily disengage from the sprag so that the gear ratio can be smoothly changed. One or more electronic pressure control (EPC) solenoids help regulate fluid pressure.

Electronic pressure (EP) sensors provide the PCM with relevant data regarding fluid pressure at different points in the transmission.

Electronic shift solenoids are used to interrupt the flow of high-pressure fluid so that the transmission shifts when commanded. The PCM uses voltage input signals from the transmission input speed sensor and the transmission output speed sensor to determine if the transmission is shifting effectively.

As with many other automatic transmission malfunctions, a transmission control system code can be caused by an electrical or mechanical failure. If the PCM detects a malfunction that requires the MIL to illuminate, a P0864 code will be stored and the MIL may be turned on.

How severe is this DTC?

If this code is stored, you may have noticed that your transmission is shifting much harder than normal. If your vehicle has displayed a P0864 code, it should be diagnosed as soon as possible.

What are some of the symptoms of the code?

Symptoms of a P0864 fault code may include:

Irregular transmission shifting patterns

Transmission failure to shift
Reduced fuel efficiency
Transmission slipping
Delayed transmission engagement
Other transmission-related codes
ABS disabled

What are some common causes of the code?

Causes of this code may include:

Transmission sensor failure
Vehicle speed sensor failure
Open or shorted circuits in the CAN harness
Mechanical transmission failure
Defective TCM, PCM, or programming error

What are the troubleshooting steps for P0864?

You will need a diagnostic scanner, a digital volt/ohmmeter (DVOM), and a reliable source of vehicle information to accurately diagnose a P0864 code. An oscilloscope can also be very useful for diagnosing various sensor outputs.

You can save time by searching for technical service bulletins (TSBs) that match the stored code, the vehicle (year, make, model, and engine), and the symptoms presented. This information can be found in your vehicle information source. If you find the right TSB, it might provide a quick solution to your diagnosis.

After connecting the scanner to the vehicle’s diagnostic port and retrieving all stored codes and relevant freeze frame data, note the information (in case the code proves to be intermittent). After that, clear the codes and test-drive the vehicle until one of two things happens; the code is restored or the PCM enters readiness mode.

The code may be more difficult to diagnose if the PCM enters readiness mode at this point, as the code is intermittent. The condition that caused the P0864 to be stored may need to worsen before an accurate diagnosis can be made. If the code is restored, proceed with the diagnosis.

You can obtain connector face views, connector pinout charts, component location diagrams, wiring diagrams, and diagnostic flowcharts (related to the code and the vehicle in question) using your vehicle information source.

Perform a visual inspection of the associated wiring and connectors. Repair or replace any wiring that is cut, burned, or damaged.

Use the DVOM to test the voltage and ground circuits at the TCM and/or PCM. If no voltage is detected, check the system fuses. Replace any blown or faulty fuses as needed and retest.

If voltage and ground are detected at the TCM, test the corresponding circuit at the PCM connector. If no voltage is detected there, suspect an open circuit between the component in question and the PCM. If voltage is found there, suspect a faulty TCM, PCM, or a programming error.

Most communication error codes can be attributed to a programming issue

What does P0865 mean?

This diagnostic trouble code (DTC) is a generic powertrain code and applies to many OBD-II vehicles (1996-newer). This may include, but is not limited to, Dodge, Honda, Volkswagen, Ford vehicles, etc. Although generic, the exact repair steps may vary depending on the year, make, model, and powertrain configuration.

If your vehicle has stored a P0865 code, accompanied by a malfunction indicator light (MIL), it means that the powertrain control module (PCM) has detected a low voltage condition in the transmission control module (TCM) communication circuit.

While some transmission control modules (for OBD-II equipped vehicles) are integrated into the PCM, most are standalone components. TCM-related codes may also be stored as P codes, B codes, or even U codes, depending on the vehicle’s make and model. If a P0865 code is stored, it is likely that other PCM and/or TCM codes are also stored. Anti-lock braking system (ABS) codes may also be recorded.

The electronic transmission control systems of OBD-II equipped vehicles are managed using a network of computers (called control modules). This involves constant communication between the various control modules via the controller area network (CAN).

The PCM uses input signals from several engine and transmission sensors to calculate the automatic shift strategy. A high-pressure pump (inside the transmission) forces fluid through the valve body and into the cam assembly; in addition to lubricating and cooling the transmission. The high-pressure fluid allows the clutches to momentarily disengage from the sprag so that the gear ratio can be smoothly changed. One or more electronic pressure control (EPC) solenoids help regulate the fluid pressure.

Electronic pressure (EP) sensors provide the PCM with relevant data regarding fluid pressure at different points in the transmission.

Electronic shift solenoids are used to interrupt the flow of high-pressure fluid so that the transmission shifts when commanded. The PCM uses voltage input signals from the transmission input speed sensor and transmission output speed sensor to determine if the transmission is shifting effectively.

As with many other automatic transmission malfunctions, a transmission control system code can be caused by an electrical or mechanical failure. If the PCM detects a malfunction that requires the MIL to illuminate, a P0865 code will be stored, and the MIL may be turned on.

How severe is this DTC?

If this code is stored, you may have noticed that your transmission is shifting much harder than normal. If your vehicle has displayed a P0865 code, it should be diagnosed as soon as possible.

What are some of the symptoms of the code?

Symptoms of a P0865 trouble code may include:

    Irregular transmission shifting patterns
    Transmission failure to shift
    Reduced fuel efficiency
    Transmission slipping
    Delayed transmission engagement
    Other transmission-related codes
    ABS disabled

What are some common causes of the code?

Causes

of this code may include:

   Transmission sensor failure
    Vehicle speed sensor failure
    Open or shorted circuits in the CAN harness
    Mechanical transmission failure
    Defective TCM, PCM, or programming error

What are the troubleshooting steps for P0865?

You will need a diagnostic scanner, a digital volt/ohmmeter (DVOM), and a reliable source of vehicle information to accurately diagnose a P0865 code. An oscilloscope may also prove very useful for diagnosing various sensor outputs.

You can save time by searching for technical service bulletins (TSBs) that match the stored code, the vehicle (year, make, model, and engine), and the symptoms presented. This information can be found in your vehicle information source. If you find the right TSB, it could provide a quick solution to your diagnosis.

After connecting the scanner to the vehicle’s diagnostic port and retrieving all stored codes and relevant freeze frame data, note the information (in case the code turns out to be intermittent). After that, clear the codes and test the vehicle until one of two things happens; the code is restored or the PCM enters readiness mode.

The code may be more difficult to diagnose if the PCM enters readiness mode at this point, as the code is intermittent. The condition that caused the P0865 to be stored may need to worsen before an accurate diagnosis can be made. If the code is restored, proceed with the diagnosis.

You can obtain connector face views, connector pinout charts, component location diagrams, wiring diagrams, and diagnostic flowcharts (related to the code and the vehicle in question) using your vehicle information source.

Perform a visual inspection of the associated wiring and connectors. Repair or replace wiring that has been cut, burned,

What does P0866 mean?

This diagnostic trouble code (DTC) is a generic powertrain code and applies to many OBD-II vehicles (1996-newer). This may include, but is not limited to, Dodge, Honda, Volkswagen, Ford vehicles, etc. Although generic, the exact repair steps may vary by year, make, model, and powertrain configuration.

If your vehicle has stored a P0866 code, accompanied by a malfunction indicator lamp (MIL), it means the powertrain control module (PCM) has detected a high voltage condition in the transmission control module (TCM) communication circuit.

While some transmission control modules (for OBD-II equipped vehicles) are integrated into the PCM, most are standalone components. TCM-related codes may also be stored as P codes, B codes, or even U codes, depending on the vehicle’s make and model. If a P0866 code is stored, it is likely that other PCM and/or TCM codes are also stored. Anti-lock braking system (ABS) codes may also be stored.

The electronic transmission control systems of OBD-II equipped vehicles are managed using a network of computers (called control modules). This involves constant communication between the various control modules via the controller area network (CAN).

The PCM uses input signals from multiple engine and transmission sensors to calculate the automatic shift strategy. A high-pressure pump (inside the transmission) forces fluid through the valve body and into the cam assembly; in addition to lubricating and cooling the transmission. The high-pressure fluid allows the clutches to momentarily separate from the sprag so that the gear ratio can be smoothly changed. One or more electronic pressure control (EPC) solenoids help regulate fluid pressure.

Electronic pressure (EP) sensors provide the PCM with relevant data regarding fluid pressure at different points in the transmission.

Electronic shift solenoids are used to interrupt the flow of high-pressure fluid so that the transmission shifts when commanded. The PCM uses voltage input signals from the transmission input speed sensor and the transmission output speed sensor to determine if the transmission is shifting effectively.

As with many other automatic transmission malfunctions, a transmission control system code can be caused by an electrical or mechanical failure. If the PCM detects a malfunction that requires the MIL to illuminate, a P0866 code will be stored and the MIL may be turned on.

How severe is this DTC?

If this code is stored, you may have noticed that your transmission is shifting much harder than normal. If your vehicle has displayed a P0866 code, it should be diagnosed as soon as possible.

What are some of the symptoms of the code?

Symptoms of a P0866 trouble code may include:

• Irregular transmission shifting patterns
• Transmission failure to shift
• Reduced fuel efficiency
• Transmission slipping
• Delayed transmission engagement
• Other transmission-related codes
• ABS disabled

What are some of the common causes of the code?

Causes

of this code may include:

• Transmission sensor failure
• Vehicle speed sensor failure
• Open or shorted circuits in the CAN harness
• Mechanical transmission failure
• Defective TCM, PCM, or programming error

What are the troubleshooting steps for P0866?

You will need a diagnostic scanner, a digital volt/ohmmeter (DVOM), and a reliable source of vehicle information to accurately diagnose a P0866 code. An oscilloscope can also be very useful for diagnosing various sensor outputs.

You can save time by searching for technical service bulletins (TSBs) that match the stored code, the vehicle (year, make, model, and engine), and the symptoms presented. This information can be found in your vehicle information source. If you find the right TSB, it might provide a quick solution to your diagnosis.

After connecting the scanner to the vehicle’s diagnostic port and retrieving all stored codes and relevant freeze frame data, note the information (in case the code proves to be intermittent). After that, clear the codes and test drive the vehicle until one of two things happens; the code is restored or the PCM enters readiness mode.

The code may be more difficult to diagnose if the PCM enters readiness mode at this point, as the code is intermittent. The condition that caused the P0866 to be stored may need to worsen before an accurate diagnosis can be made. If the code is restored, proceed with the diagnosis.

You can obtain connector face views, connector pinout charts, component location charts, wiring diagrams, and diagnostic flowcharts (related to the code and the specific vehicle) using your vehicle information source.

Perform a visual inspection of the associated wiring and connectors. Repair or replace wiring that has been cut, burned

How serious is the code?

If the transmission does not have sufficient fluid pressure, not only can serious driving problems occur, but the transmission itself could suffer severe internal damage. Therefore, a P0867 diagnostic code is very serious.

Symptoms

Symptoms of a P0867 include:

• Transmission overheating
• Slipping
• Gear engagement failure

Causes

• Dirty transmission fluid
• Low transmission fluid level
• Transmission fluid leak
• Transmission pump failure
• Faulty transmission fluid pressure sensor
• Damaged wiring/connectors
• Overheated transmission
• Overheated engine
• Transmission fluid temperature sensor failure

How to diagnose the code?

One of the biggest causes of an OBDII P0867 fault code is dirty or low transmission fluid. Transmission fluid leaks can also cause this issue, as well as damaged wiring or connectors on the transmission wiring harness. If none of these issues are present, the transmission fluid pressure sensor and transmission fluid temperature sensor should be checked. If no problems are detected, the transmission pump or another internal transmission component could be to blame.

What repairs will fix P0867?

• Change transmission fluid and filter
• Repair transmission fluid leaks
• Repair or replace damaged wiring and sensors on the transmission wiring harness
• Replace transmission pump
• Replace transmission fluid pressure sensor
• Replace transmission fluid temperature sensor
• Replace or repair transmission