How severe is this DTC?
The severity of this code can vary greatly from a simple check engine light on a vehicle that starts and runs to an automobile that idles roughly or does not start at all. The code can be serious depending on the symptoms present. If the code is caused by a faulty timing chain or belt, the result can be internal engine damage.
What are some of the symptoms of the code?
Symptoms of a P2090 fault code may include:
- Irregular engine idle
- Decreased oil pressure
- Engine may misfire
- Poor engine performance
- Increased fuel consumption
- Change oil or service soon light is on
- Check engine light on
What are some common causes of the code?
Causes
of this P2090 code may include:
- Worn timing belt or chain
- Faulty camshaft variable timing solenoid
- Faulty variable valve timing actuator
- Engine oil level too low
- Blown fuse or fuse link (if applicable)
- Misaligned timing components
- Corroded or damaged connector
- Faulty or damaged wiring
- Faulty ECU
What are the troubleshooting steps for P2090?
The first step in the troubleshooting process for any malfunction is to search for Technical Service Bulletins (TSBs) for the specific vehicle by year, model, and engine combination. In some circumstances, this can save you a lot of time in the long run by pointing you in the right direction.
The second step is to check the oil level and condition. Proper oil pressure plays a key role in the operation of this circuit. Next, locate all components in this circuit and perform a thorough visual inspection to check the associated wiring for obvious defects such as scraping, rubbing, bare wires, or burns. Then, identify connectors for security, corrosion, and damaged pins. This process should include all related sensors, components, and computers.
Advanced Steps
Advanced steps become very vehicle-specific and require advanced equipment suited to operate accurately. These procedures require a digital multimeter and vehicle-specific technical references. Other ideal tools for this situation are a timing light and an oil pressure gauge. Voltage requirements vary depending on the specific year and model of the vehicle.
Timing Checks
Timing must be checked using the appropriate testing equipment and adjustments must be precise for the engine to run properly. An incorrect timing reading indicates that essential timing components such as the belt, chain, or gears may be worn or damaged. If this code appears immediately after replacing a timing belt or chain, you may suspect misalignment of timing components as a possible cause.
Voltage Checks
Camshaft and crankshaft sensors are provided with a reference voltage of approximately 5 volts from the ECU.
If this process identifies the absence of a power source or ground, continuity tests may be required to check the integrity of wiring, connectors, and other components. Continuity tests should always be performed with the power disconnected from the circuit, and normal references for wiring and connections should be 0 ohms of resistance. Resistance or lack of continuity is an indication of faulty wiring that is open or shorted and must be repaired or replaced.
What are the common repairs for this code?
- Replacement of the camshaft variable timing solenoid
- Replacement of the variable valve timing actuator
- Replacement of the blown fuse or fuse link (if applicable)
- Cleaning corrosion from connectors
- Repairing or replacing faulty wiring
- Changing oil and filter
- Replacing the timing belt or chain
- Flashing or replacing the ECU
Common mistakes may include:
Replacing the ECU or sensors is often done in error, when incorrect timing alignment or insufficient oil pressure is the problem.
I hope the information consulted in this article has been helpful in guiding you in the right direction to correct the issue with the camshaft position actuator control circuit error code. This article is strictly informative, and the technical data and service bulletins specific to your vehicle should always take priority.
