P0925 - Shift Reverse Actuator Circuit Range/Performance

P0925 – OBD-II Trouble Code Technical Description

Reverse Shift Drive Circuit Range/Performance

What does the fault code mean P0925?

Trouble code P0925 is related to the range/performance reverse actuator circuit in automated manual transmissions and dual clutch transmissions. If a shift actuator circuit operating range discrepancy is detected, the control module (TCM) stores a P0925 code in memory and displays an error message on the control panel.

Possible reasons

Code P0925 may indicate the following problems:

• Problem with the forward gear shift actuator.
• The forward gear selection solenoid is faulty.
• Short circuit or damaged wiring.
• Faulty harness connector.
• Transmission control module (TCM) malfunction.
• Damage to the guide gear or shift shaft.
• Internal mechanical failure.
• ECU/TCM problems or malfunctions.
• Malfunction of the reverse gear guide or shift shaft.
• Malfunction of the PCM, ECM or transmission control module.
• Problems with the gear shift reverse drive.
• Mechanical problems in the gearbox.
• Faults in the electrical components of the system, such as shorted wires or corroded connectors.

What are the symptoms of a fault code? P0925?

Our main motive is customer satisfaction and therefore we will help you diagnose the P0925 code by mentioning some of the main symptoms below:

• Visibility in the Check Engine light.
• Problems with engaging or disengaging reverse gear.
• Lower fuel efficiency.
• The transmission behaves chaotically.
• Enabling or disabling reverse becomes difficult or impossible.
• The "Check Engine" warning light on the instrument panel comes on (the code is stored as a fault).
• The gearbox is not working properly.
• Gears do not engage or shift.
• There may be no other symptoms other than a stored DTC.

How to diagnose a fault code P0925?

The first thing to do when diagnosing a P0925 code is to check if the electrical part is damaged. Any faults such as breakdowns, disconnected connectors or corrosion can interrupt the transmission of signals, causing the transmission to fail to control. Next, check the battery, as some PCM and TCM modules are sensitive to low voltage.

If no faults are found, check the gear selector and drive. The Transmission Control Module (TCM) very rarely fails, so when diagnosing P0925, it should be checked if all other checks have been completed.

Here are a few steps to follow to diagnose this DTC:

• It is necessary to use an advanced scan tool so that you can read the ECM data value.
• A digital voltage meter with attachments must be used.
• A mechanic can also check for additional trouble codes.
• Wiring, connectors, as well as other components must be properly diagnosed for faults.
• Then clear the P0925 trouble code and the entire system should be tested properly to see if the code returns.
• If you find that the code returns again, you should use a digital volt/ohmmeter to check the voltage and ground signal at the shift actuator switch.
• Next, check the continuity between the shift actuator switch and battery ground.
• Next, carefully inspect the shift shaft as well as the front guide for any problems and just make sure they are working properly.
• The mechanic should then clear the P0925 trouble code to see if the code appears again or not.
• If a code appears, the TCM should be carefully checked for defects.
• If the TCM is ok, a technician should check the integrity of the PCM to see if there are any defects in it.
• Whenever a mechanic replaces a component, he must stop checking and then reset the error codes. The car should be restarted again to see if the code still appears.

Diagnostic errors

When diagnosing car problems, common mistakes may include:

1. Incomplete or inaccurate reading of error codes, which may lead to misidentification of the problem.
2. Insufficient inspection of electrical components such as wiring and connectors, which may result in problems related to electrical signals being missed.
3. Inattention when inspecting mechanical components such as the engine, transmission and other mechanical components, which may result in missing physical damage or wear.
4. Misinterpretation of symptoms or errors as a result of misunderstanding the operation of certain vehicle systems.
5. Failure to follow the manufacturer's diagnostic and repair instructions may result in incorrect conclusions and further damage.

How serious is the fault code? P0925?

The P0925 trouble code is serious because it can cause problems with handling and driving safety. This code indicates problems with the reverse drive chain in automated manual transmissions and dual clutch transmissions. Problems associated with this code can cause difficulty engaging and disengaging reverse gear and may cause the transmission to malfunction. It is important to immediately correct the conditions that caused this code to appear to prevent possible problems with driving.

What repair will help eliminate the code? P0925?

To resolve DTC P0925, follow these steps:

1. Check the electrical parts for damage such as breaks, loose connectors or corrosion. Fix any problems found.
2. Check the condition of the battery as low voltage may cause this code to occur. Make sure the battery maintains at least 12 volts and that the alternator is functioning properly.
3. Check the condition of the gear selector and drive. If damage is found, replace or repair these components.
4. Diagnose the transmission control module (TCM). If you find any faults, replace the TCM if necessary.
5. Carry out a thorough diagnosis of wiring, connectors and relays. Check the gear reverse drive, as well as the condition of the guide gear and gear shift shaft.
6. Replace or repair the PCM, ECM or other related components as necessary.

It is important to remember that repairs should be carried out in accordance with the vehicle manufacturer's recommendations and should be referred to a qualified automotive technician if necessary.

What is P0925 Engine Code [Quick Guide]

P0925 – Brand-specific information

Trouble code P0925 can appear on different makes of vehicles. Here are some of them along with transcripts:

1. Acura – Problems with the reverse drive chain.
2. Audi – Reverse drive chain range/parameters.
3. BMW – Incorrect operation of the reverse drive circuit.
4. Ford – Reverse drive circuit operating range mismatch.
5. Honda – Problem with the reverse gear shift actuator.
6. Toyota – Problems with the reverse gear selection solenoid.
7. Volkswagen – Malfunction in the gear shift reverse drive.