How serious is the code?

In terms of severity, a P0909 diagnostic code is extremely serious, as it means the TCM cannot shift gears as programmed. This can lead to serious driving problems and/or an unusable vehicle.

Symptoms

Symptoms of a P0909 include:

• Hard, delayed, or irregular shifts
• Transmission stuck in a single gear
• Transmission will not shift into or out of a gear
• Transmission refuses to engage gears
• Clutch slipping
• Engine seems to misfire

Causes

• Faulty gear lever assembly
• Faulty clutch position sensor
• Faulty clutch actuator
• Shift and select actuator assembly
• Stroke sensors
• Misadjusted control linkages
• Damaged wiring and/or connectors
• Clutch or transmission failure

How to diagnose the code?

The diagnostic procedure for a P0909 OBDII fault code will be specific to your transmission type. But it will involve a series of electrical tests and mechanical tests to determine which transmission parts have failed.

What repairs will fix P0909?

• Replace the shift and select actuator assembly
• Replace the stroke sensors
• Replace the gear shift mechanism
• Replace the clutch position sensor
• Replace the clutch actuator
• Replace the clutch
• Repair or replace damaged wiring or connectors
• Adjust or repair control linkages
• Repair or replace the transmission

Related Codes

P0905 – Gate select position circuit range/performance
P0906 – Gate select position circuit low
P0907 – Gate select position circuit high
P0908 – Gate select position circuit intermittent
P0910 – Gate select actuator circuit/open

P090A, P090B, P090C, P090D, P090E, P090F ISO/SAE Reserved

What does the P0910 code mean?

Dual-clutch and automated manual transmissions often use what is called a Gear Shift Actuator Module (GSAM). The GSAM engages or disengages the clutch, as well as selects the gear ratio based on commands from the Transmission Control Module (TCM).

The selection solenoid activates a valve that applies hydraulic pressure to move the selector shaft. This moves the selector fork into position within the transmission assembly. In most cases, a shift solenoid is then used to engage the gear and a clutch solenoid is used to control the clutch. This process allows for automatic shifting of the manual transmission gears.

The P0910 code indicates that there is a problem with the selected solenoid circuit, likely an open circuit.

What are the common causes of the P0910 code?

Wiring problems
TCM programming or faulty TCM
Faulty selection solenoid

What are the symptoms of the P0910 code?

Symptoms associated with the P0910 code may include an illuminated check engine light, transmission that does not shift properly or does not shift at all.

How do you troubleshoot the P0910 code?

This code is often set in error. The first step is to clear the code, drive the vehicle (if possible), and see if it returns. If it does not, no further diagnosis is currently needed. Next, check for Technical Service Bulletins (TSBs) regarding the concern. If no TSB is found, locate the GSAM and perform a visual inspection of the unit and wiring. Repair as needed. If no issues are detected so far, proceed with a sequential diagnosis of the system. Refer to the manufacturer’s service information for the exact diagnostic process.

Test the solenoid: Disconnect the solenoid connector. With the key off and the ignition off, connect a digital multimeter set to ohms to each of the solenoid winding terminals. Consult factory repair information for the injector resistance specifications. If the resistance readings do not meet specifications, the solenoid must be replaced.

Another way to test the solenoid is to jump it. To do this, connect a jumper wire between the positive battery terminal and the B+ terminal of the solenoid connector. Connect the other connection wire between the negative battery terminal and the ground terminal on the solenoid connector. In many cases, if the solenoid is functioning correctly, you will be able to hear the solenoid click when it is jumped.

Note: In some cases, the solenoid is not separately serviceable from the GSAM.

Check the circuit: You can check the continuity between the TCM and the solenoid using a digital multimeter set to ohms.

To do this, first check the ground side of the circuit. Connect the multimeter between the ground terminal on the harness side of the solenoid connector and the solenoid ground terminal of the TCM. An over-limit (OL) reading on your meter indicates that there is an open circuit between the solenoid and the TCM. However, if you do not get an over-limit reading, the TCM may be faulty or require reprogramming.

Next, check the continuity of the positive side of the circuit. Connect the multimeter between the B+ terminal on the harness side of the solenoid connector and the solenoid B+ terminal of the TCM. An over-limit (OL) reading on your meter indicates that there is an open circuit between the solenoid and the TCM. However, if you do not get an over-limit reading, the TCM may be faulty or require reprogramming.

Codes related to P0910

DTC P0911: Gate Select Actuator Circuit Range/Performance
DTC P0912: Gate Select Actuator Circuit Low
DTC P0913: Gate Select Actuator Circuit High

To make an automated manual transmission function like an automatic, what is called a gate selector actuator uses multiple sensors and an electric motor to move everything inside the transmission. If there is an electrical signal on the GSA assembly circuit that is not within the preprogrammed range or performance parameters, record a DTC P0911.

How severe is the code?

Diagnostic code P0911 is one of the most serious OBD2 codes because it means the transmission is not fully controlled by the ECU.

Symptoms

Symptoms of a P0911 include:

• Hard or delayed shifts
• Erratic transmission behavior
• The transmission wants to stay in one gear
• The transmission refuses to engage a gear
• Clutch slipping
• The engine seems to misfire

Causes

• Faulty shift assembly
• Faulty clutch position sensor
• Faulty clutch actuator
• Misadjusted control linkages
• Damaged wiring and/or connectors
• Faulty clutch or transmission

How to diagnose the code?

The diagnostic procedure to determine the cause of an OBDII P0911 trouble code varies by manufacturer, so a technician will need to determine the exact diagnostic procedure for your vehicle type.

What repairs will fix P0911?

• Replace the shift mechanism
• Replace the clutch position sensor
• Replace the clutch actuator
• Replace the clutch
• Repair or replace damaged wiring or connectors
• Adjust or repair control linkages
• Repair or replace the transmission

P0912: OBD-II Fault Code for Low Gate Select Actuator Circuit

A transmission gate selector actuator assembly contains several sensors and an electric motor. The ECU reads data from the sensors, then activates the electric motor to engage a gear based on the position of the shift lever. If there is an abnormally low voltage signal on the gate select actuator circuit, a DTC P0912 will be recorded.

How severe is the code?

If the ECU cannot use the gate select actuator to engage the gear you have selected, you will experience a number of driving problems, including irregular gear changes and clutch slipping.

Symptoms

Symptoms of a P0912 include:

Harsh shifts
Delayed shifts
Irregular shifting patterns
Transmission seems stuck in gear
Failure to engage gear
Clutch slipping
Engine seems to misfire

Causes

Faulty shift mechanism
Faulty clutch position sensor
Faulty clutch actuator
Misadjusted control linkages
Damaged wiring and/or connectors
Faulty clutch or transmission

How to diagnose the code?

Due to the complexity of most semi-automatic transmissions, diagnosing an OBDII fault code P0912 will require the manufacturer’s troubleshooting process. But for the most part, it involves a series of electrical and mechanical tests.

What repairs will fix P0912?

Replace the shift mechanism
Replace the clutch position sensor
Replace the clutch actuator
Replace the clutch
Repair or replace damaged wiring or connectors
Adjust or repair control linkages
Repair or replace the transmission

To engage the gears you have selected with the gear lever, the gear selection actuator sends data from multiple sensors to the ECU, which then activates an electric motor to engage the gear. If there is an abnormally high voltage signal on the gear selection actuator circuit, a DTC P0913 will be recorded.

How severe is the code?

In an automated manual transmission, a diagnostic code P0913 is very severe. This means you will have a number of transmission problems that can eventually render the vehicle unusable.

Symptoms

Symptoms of a P0913 include:

• Irregular, harsh, or delayed shifts
• Transmission stays in a single gear
• Transmission will not go into drive or gear
• Clutch slipping
• Engine appears to misfire

Causes

• Gear shift assembly is faulty
• Clutch position sensor is faulty
• Clutch actuator is faulty
• Misadjusted control linkages
• Damaged wiring and/or connectors
• Clutch or transmission has failed

How to diagnose the code?

To diagnose an OBDII fault code P0913, your technician will need to follow the manufacturer’s diagnostic process for your specific vehicle. It involves a number of electrical and mechanical tests and will help them determine the cause of this OBD2 fault code.

What repairs will fix P0913?

• Replace the gear shift mechanism
• Replace the clutch position sensor
• Replace the clutch actuator
• Replace the clutch
• Repair or replace damaged wiring or connectors
• Adjust or repair control linkages
• Repair or replace the transmission

Definition of Code P0914

When a vehicle stores a fault code P0914, it indicates that the Powertrain Control Module (PCM) has detected a problem with the gear shift position circuit. Associated codes include fault codes P0915, P0916, P0917, and P0918.

What Does Code P0914 Mean?

A fault code P0914 indicates an electrical error in the gear shift position circuit. When the voltage from the gear shift position sensor varies too much according to the manufacturer’s specifications, a P0914 fault code is recorded and the check engine light illuminates.

What Causes Code P0914?

The most common reason for storing a P0914 fault code is damaged or faulty wiring, connectors, or components in the gear shift position system. Blown fuses, a short circuit to the battery ground, and a faulty PCM can also cause this code to be stored.

What Are the Symptoms of Code P0914?

Symptoms of a P0914 fault code include harsh shifting and, in some cases, the inability to change gears. Another common side effect of a P0914 fault code is a reduction in the fuel consumption of the vehicle that recorded the code.

How Does a Mechanic Diagnose Code P0914?

To diagnose and repair a P0914 fault code, a mechanic must use an advanced scanner and a digital voltmeter/ohmmeter. Using this equipment, the mechanic must perform the following tasks:

Carefully inspect all wiring, connectors, and components for any damage.
Clear the code and test the vehicle to see if the code returns.
If the code returns, download all freeze frame data and stored codes for use in further diagnosis.
Using a digital voltmeter/ohmmeter, the mechanic must then test the voltage and ground signal at the gear shift position circuit.
If no voltage or ground signal is detected, the mechanic must first disconnect the PCM and other associated control modules. Then, they should test the continuity of the gear shift position circuit with the battery ground.
If the code returns after clearing it, the mechanic must inspect the gear shift shaft to see if it is functioning properly.
Additionally, the mechanic must also inspect the gear guide rail to see if it is damaged.
If both of these components appear to be correct, the mechanic should suspect a faulty PCM.
The mechanic must inspect and test the PCM to see if it is bad or simply needs to be reprogrammed.
Finally, the mechanic must clear the code and retest the system to see if the code returns.

Common Mistakes When Diagnosing Code P0914

Mechanics diagnosing and correcting a P0914 fault code most often make the mistake of replacing the entire gear shift position system when the problem was related to a much cheaper and easier-to-replace electrical component, connector, or wiring. Additionally, failing to clear codes when they are stored can result in not resolving the issue causing the code, which will lead to its eventual return.

How Severe Is Code P0914?

A stored P0914 fault code could only cause shifting problems, although in some cases, the vehicle’s gear lever may refuse to operate. This is why it is imperative that a mechanic addresses the P0914 fault code upon its first storage. Furthermore, the conditions causing the storage of a P0914 fault code can further damage the transmission if not diagnosed and treated.

What Repairs Can Fix Code P0914?

• To repair a P0914 fault code, a mechanic must take the following steps after diagnosis:
• Replace any faulty or damaged wiring, connectors, or components.
• Replace the gear shift position circuit if it is faulty.
• Replace the gear shift shaft if it is damaged and not functioning properly.
• Replace the gear guide rail if it is damaged.
• Replace the PCM if it is faulty. The mechanic must also reprogram the PCM once installed.

Definition of Code P0915

A P0915 occurs when the vehicle’s Powertrain Control Module (PCM) has detected an insufficient range in the transmission shift position circuit.

What Does Code P0915 Mean?

The transmission shift system is responsible for determining the engine’s output power. In the case of a P0915, the PCM has detected a limitation in the gear lever’s ability to cover its full range. This can lead to a series of limitations for the transmission system and the vehicle’s operation. A P0915 occurs when there is a reported discrepancy in the detected position between two sensors connected to the PCM.

What Causes Code P0915?

A P0915 fault code is most often caused by faulty wiring. Corroded, damaged, disconnected, or broken wiring and/or circuits can be the source of the malfunction. In rare cases, the vehicle’s PCM may be defective. This instance can also result in a P0915.

What Are the Symptoms of Code P0915?

A P0915 fault code will result in harsh shifting, reduced fuel consumption, and in the worst case, an inability of the vehicle to shift gears.

How Does a Mechanic Diagnose Code P0915?

A P0915 code can be identified with an OBD-II scanner. All wiring and circuits related to the sensors and transmission systems must be carefully inspected for any signs of damage, corrosion, or disconnection.

Common Mistakes When Diagnosing Code P0915

Transmission components may be mistakenly replaced when the sensors themselves are faulty.

How Severe Is Code P0915?

Depending on the extent of the sensor deviation (and whether the issue is related to the transmission or the sensor itself), problems can range from harsh shifting to an inability to shift gears. In the worst case, code P0915 will render the vehicle unusable. Code P0915 should be serviced as soon as possible.

What Repairs Can Fix Code P0915?

• Check the primary and secondary sensors connected to the PCM and verify their proper operation.
• All components identified as damaged or defective should be addressed accordingly.
• Any wiring identified as broken or corroded should be repaired or replaced as appropriate.
• In rare cases, the PCM itself may be at fault. If repairs are needed for the PCM, a memory-saving device should be connected to avoid the lengthy reprogramming process.

How serious is the code?

The P0916 diagnostic code is actually quite serious, as it means the vehicle’s computer cannot determine which gear you are trying to select. When this happens, the transmission may shift erratically. Or, it may not shift into higher gear, leaving you with an unusable vehicle.

Symptoms

Symptoms of P0916 include:

• Erratic, harsh, or delayed shifting
• Transmission not engaging gears

Causes

• Damaged wiring
• Broken/corroded connectors
• Faulty sensor

How to diagnose the code?

Diagnosing an OBDII trouble code P0916 will require the manufacturer’s specific diagnostic procedure. But it typically involves a series of electrical and mechanical tests to determine which transmission components are at fault.

What repairs will fix P0916?

• Repair or replace damaged wiring/connectors
• Replace faulty sensors
• Update or replace ECU/TCM

Related codes

P0914 – Gear shift position circuit
P0915 – Gear shift position circuit range/performance
P0917 – High gear shift position circuit
P0918 – Intermittent gear shift position circuit
P0919 – Gear shift position command error
P0920 – Forward gear shift actuator

Definition of Code P0917

Fault code P0917 detects an electrical malfunction in the gear shift position circuit.

What Does Code P0917 Mean

Code P0917 is a generic OBD-II fault code that indicates an electrical error in the transmission’s gear shift position circuit. The gear shift position circuit detects when the vehicle is in forward or reverse (in an automatic transmission), or in an even or odd gear (in a manual transmission). When the Powertrain Control Module (PCM) detects an electrical anomaly in the gear shift position circuit, the P0917 fault code is triggered.

What Causes Code P0917?

Fault code P0917 is typically caused by damaged or defective electrical components in the gear shift position system. This can include short-circuited wires, corroded connectors, or blown fuses. Other potential causes of the code are a short to the positive battery and a faulty PCM.

What Are the Symptoms of Code P0917?

Code P0917 will usually be accompanied by the check engine light soon illuminating on the vehicle’s gauge cluster. There will likely be noticeable transmission issues, which can be as mild as rough shifting or as severe as a complete inability to change gears. The vehicle will probably also experience decreased fuel consumption.

How Does a Mechanic Diagnose Code P0917?

Code P0917 will be diagnosed using a standard OBD-II fault code scanner. A qualified technician will use the scanner to view the freeze frame data of the code and to check for any additional detected codes. If multiple codes are detected, they will need to be addressed in the order the scanner displays them. Then, the mechanic will need to reset the fault codes, restart the vehicle, and check if the P0917 code is still detected. If not, it was likely triggered by mistake or due to an intermittent error.

If the code persists, the mechanic will start by visually inspecting the electrical components of the gear shift position system. Any damaged wires, connectors, or fuses will need to be replaced. The mechanic can then check for a short to the positive battery. If the issue is not found, a more in-depth inspection of the gear shift position system (especially the sensors) and the PCM will be necessary.

After replacing a component, the inspection should be paused while the mechanic resets the fault codes, restarts the vehicle, and checks again to see if the code is detected. This will let the technician know as soon as the problem is resolved.

Common Mistakes When Diagnosing Code P0917

The most frequent mistake made when diagnosing code P0917 comes from not following the OBD-II diagnostic protocol. It is imperative that mechanics always follow the step-by-step protocol, as this ensures that diagnostics and repairs are effective and thorough.

It is fairly common to mistakenly replace the entire gear shift position system when the only fault was a defective electrical component.

How Severe Is Code P0917?

A vehicle with the P0917 fault code may or may not be drivable. In some cases, the car will drive normally or experience rough shifting, while in other cases, shifting will be impossible, preventing the car from moving at all. Even if the car feels like it’s driving fine, code P0917 can damage the transmission, so the vehicle should always be inspected and repaired as soon as the code is detected.

What Repairs Can Fix Code P0917?

Repairs for fault code P0917 are:

• Replacement of the system’s electrical components
• Replacement of the circuit
• In rare cases, replacement of the PCM