Fault code P0025 is called “”B” Camshaft Position – Timing Over-Retarded (Bank 2)” but in different programs it may be called differently. This fault designation applies to all vehicles equipped with OBD-II.
Technical description and explained code P0025
This Diagnostic Trouble Code (DTC) is a generic powertrain code. Error P0025 is considered a general code because it applies to all makes and models of vehicles. Although the specific repair steps may vary slightly depending on the model.
Code P0025 refers to variable valve timing (VVT) or variable camshaft timing (VCT) components. Also the vehicle’s Powertrain Control Module (PCM) or Engine Control Module (ECM). VVT is a technology used in an engine to give it more power or efficiency under different operating conditions.
It consists of several different components, but fault code P0025 specifically refers to the camshaft timing. If the camshaft timing is excessively slow, the engine error light will come on and the code will be set.
The camshaft “B” is the exhaust, right or rear camshaft. This code refers to Bank 2. Bank 2 is the side of the engine that does not contain cylinder #1.
Symptoms of vehicle malfunctions
The main signal that an error P0025 has occurred is the Malfunction Indicator Lamp (MIL) is also known as the CheckEngine Light.
It can also be warning signs such as:
- The Check Engine light on the control panel will illuminate (the code will be written to the ECM memory as a fault).
- The vehicle engine may have difficulty starting.
- Floating revolutions, as well as attempts to stall at idle.
- Other symptoms are also possible.
Fault P0025 is serious enough, when it appears, the car engine may be unstable or stall at all, which may lead to dangerous situations on the road. It is necessary to find the cause of the problem as soon as possible and correct it before it worsens.
Factors that can cause this error code
The error code P0025 can mean that one or more of the following problems have occurred:
- Incorrect valve timing setting.
- Wiring problem in inlet phase control solenoid valve system.
- Continuous oil flow to VCT piston chamber.
- Distribution valve control solenoid defective (stuck in open position).
How to fix or reset OBD-2 code P0025
Some suggested steps for troubleshooting and fix the error code P0025:
- Visually inspect the camshaft and crankshaft position sensors electrical wiring and connector. Check the engine oil level and viscosity, and check the condition and viscosity of the engine oil.
- Check the engine oil level and the condition and viscosity of the oil.
- Read all stored data and error codes with an OBD-II scanner. To determine when and under what circumstances the error occurred.
- Erase the error codes from the ECM memory and test drive the vehicle to see if code P0025 appears again.
- Give a command to turn the oil control solenoid valve on and off to find out if the timing of the valve is changing.
Diagnose and repair of problems
The first thing to check is the operation of the VCT solenoid. You need to make sure that the valve is not jammed or stuck due to contamination. To do this, refer to your car’s repair manual. After that, you can check the components of the VCT unit.
If solving the P0025 error problem is difficult for you, you should contact the experts. Authorized dealers have advanced tools. As well as the ability to perform detailed troubleshooting actions. This includes the ability to test components with a diagnostic tool.
On which vehicles does this problem occur most frequently
Fault code P0025 can occur on different vehicles but there are statistics on which brands this occurs most often. Here is a list of some of them:
- Acura
- Audi
- BMW
- Buick (LaCrosse)
- Chevrolet
- Dodge
- Ford
- Honda
- Hyundai
- Lexus
- Mercedes-Benz (M273, W164)
- Peugeot
- Subaru
- Toyota
- Volkswagen
Fault code P0025 can sometimes be found with other errors. The most common are the following: P0005, P0010, P0011, P0012, P0015, P0018, P0020, P0021, P0251, P0420.
