Many people complain about the P0340 code after replacing the malfunctioning camshaft position sensor of the car engines. However, this sensor regulates the positioning of the crankshaft drive, which converts piston movements into torque.
If you have replaced the camshaft position sensor but still get the code, it is due to a faulty camshaft wheel, broken O-rings, malfunctioning electric circuit, modified installation and incompatible sensor, non-insulator wires, and damaged starter motor.
Corrosion and overuse can damage the sensor, and the P0340 code appears. I replace it with professional help because it reduces the chances of diagnostic trouble codes.
Why do I still get the code after replacing the camshaft position sensor?
I replaced the damaged and malfunctioning camshaft position sensor of my car engine. But, the P0340 still appears due to the following reasons.
Faulty camshaft wheel
The camshaft wheel is a round reluctor ring that mounts on the topside of the crankshaft. It can rotate the crankshaft and spins the sensor of the magnetic field.
Then, it delivers position signals to the ECM (electronic/ engine control module of a car. The ECM regulates the ignition timing of the automobile.
This wheel comprises a ferrous coating and has teeth-like things on the surface. These teeth-like objects spin while this wheel rotates.
They send the off-and-on signals to the ECM. However, they are stable and provide optimized functionality.
But, you can hit the reluctor wheel with a wrench or screwdriver while replacing this sensor. In such circumstances, it loses efficiency and sends signals to the electronic control module.
Then, the P0340 code appears after changing it.
The camshaft position sensor has dual O-rings according to their stock layout. These O-rings are metallic components that stabilize their functionality.
A few people fix one O-ring while replacing it in their car engines. Leaving the O-ring without repair can cause the trouble code after its swap.
Sometimes, a few individuals install old and damaged O-rings in the engine. They use one new and another old O-ring which reduces their efficiency because a gap generates between them.
Their re-adjustment while replacing it can result in a P0340 code. In addition, it indicates the malfunctioning O-rings, which require replacement.
Malfunctioning electric circuit
This sensor is electrically regulated. It has a specific electric circuit that monitors and handles its performance inside the car engine.
The electrically operating circuit has fuses, relays, and wires. In addition, it has connectors for stable power flow.
However, it uses the electric power of the circuit and sends electrical signals to the electronic control module of a car to regulate the ignition.
Furthermore, these signals handle the position of the crankshaft. It records the rotational speed of the crankshaft.
It uses an electric circuit and its power and supplies signals to the Powertrain control module. The connectors and relays of the circuit after its replacement.
Sudden pressure and excessive force can break the connectors. A few people do not have sufficient skills for its swap.
It leads to electric short circuits and damages the wires. The electric circuit malfunctions and reduces the performance of connectors.
They become loose, and you can see the P0340 code on the car dashboard.
Modified installation and incompatible sensor
The replacement of the camshaft position is a time-consuming procedure. Furthermore, it is a technical method and requires expertise for the proper sensor swap.
The non-skilled and non-professional people cannot install it properly. Moreover, you cannot change the installation method because its efficiency reduces, and the ignition time changes.
It fails, and a trouble code P0340 illuminates which shows its malfunctioning and electrical failures. Moreover, a compatible sensor is essential for the replacement procedure.
A few people select wrong and incompatible options. These are defective and cannot adjust.
Also, grime and dust accumulate on its mounting position inside the car engine. Installing the new sensor without cleaning the debris can reduce its efficiency.
The sensor malfunctions, and the code appears. In such circumstances, it indicates its failure after its replacement.
The car engines have camshaft position sensors for proper ignition timing. However, they have three different cords with variable performances.
One cord monitors and regulates the voltage flow inside the circuit. The second and third wires and signal and ground cord.
You can damage the wires while replacing the position sensor of a vehicle. Excessive pressure can break the insulation of cords.
In such circumstances, the insulation breaks and fall. The non-insulator wires undergo electrical short circuits.
They malfunction and cannot support it. The ground wire and signal cord cannot regulate the signals toward the vehicle PCM.
Also, the malfunctioning cords lose their connection and malfunction. In such circumstances, it cannot perform, and ignition time varies and triggers P0340 after its replacement with a compatible option.
Damaged starter motor
The car engines have electrically functioning starter motors. This motor can start and rotate the engine during the ignition signals.
You can turn on the ignition system of the car. Then, it sends signals to the starter motor.
The electrically controlled motor engages the engine and rotates it at specific rotations per minute.
A few people can damage the engine starter motor when they change the broken sensor. In such circumstances, people can damage its external surface.
Also, you can lose its connectors and cords from the mounting points. As a result, it malfunctions, and the starter motor cannot maintain its performance and signals.
A defective electric starter motor can trigger the trouble code P0340. It appears when you replace a malfunctioning sensor.
How to fix codes which appear when you replace the camshaft position sensor?
You can fix the P0340 code when it appears when you change the camshaft position sensor of the car engine. You can visually check the ground and signal cords and replace them with new and stable wires.
Furthermore, you can check the performance of the reluctor wheel and replace it. You can check the stability of the starter motor, its connectors, and cords.
Then, you can change the malfunctioning cords and connectors. You can stabilize the performance of the starter motor by repairing its connections.
Also, you can troubleshoot the Powertrain control module with the OBDII (onboard diagnostic scanner). You can examine the malfunctioning O-rings and replace them with compatible options.
You can stabilize the power flow of the circuit. However, you cannot put pressure on cords and sensors directly because it can damage them.
You can calibrate it and reset its signal delivery capabilities. You can turn off the vehicle’s power.
Then, you can connect the OBD II scanner to the engine and regulate its settings. You can find the option of cam relearning on the scanner.
Also, you can push OK and restart the car engine. You can leave the engine for about 10 to 25 minutes.
The coolant can reach standard temperature, and its calibration/relearning completes within seconds.
Which code still appears after replacing the Camshaft position sensor?
A P0340 code still appears even after replacing the built-in position sensor of the car engine. It controls the timing of ignition on a vehicle.
Voltage changes, corrosion, external pressure, and more power flow can damage it. You a replace it with a compatible option without damaging its circuit, wires, connectors, and O-rings.
A few people damage its connected components. Others install incompatible and defective camshaft position sensors because they do not comprise proper knowledge.
The faulty installation decreases functionality, and P0340 flashes on the car dashboard. In addition, it shows the problems of camshaft sensors after their swap.
Also, it indicates the variable ignition timing and chances of reduced acceleration. The code remains on the dashboard after its replacement.
It is a frustrating situation and requires troubleshooting. The signs of the P0340 code are variable ignition timing and engine misfiring.
In such circumstances, the driving power decreases, and the engine idles. As a result, the motor damages and catastrophic failures increase.
You cannot start the car because the ignition time changes.