Welcome to the Automotive Diagnosis YouTube channel, where we share insider tips and tricks for troubleshooting car issues. In today’s video, we will guide you through the process of testing and fixing the P0016 crankshaft-camshaft position correlation fault code. So, grab your favorite beverage, sit back, and let’s dive in!
Understanding the P0016 Fault Code
The PCM (Powertrain Control Module) continuously monitors the engine timing to ensure smooth operation. When there is a misalignment in the timing between the crankshaft and camshaft on the intake side of bank one, the P0016 fault code is triggered. To diagnose the issue, we need to examine several potential causes, including engine oil quality, the intake solenoid valve, camshaft position sensor, crankshaft position sensor, intake VVT (Variable Valve Timing), and engine timing.
Engine Oil: The Vital Role It Plays
Engine oil is crucial for the proper functioning of variable valve timing systems. If the fault code persists and you haven’t replaced the engine oil in a while, start by changing the oil. Additionally, check and clean the VVT solenoid valve to ensure optimal oil flow and prevent any accumulation of sludge.
Testing the Bank 1 Intake VVT Solenoid Valve
The VVT solenoid valve regulates the flow of oil to the VVT system, allowing the engine to advance or retard the timing. Some engines have a separate VVT oil filter, while others incorporate it within the solenoid. Start by locating the external filter and cleaning it thoroughly. Then, identify the intake VVT solenoid for bank one and proceed with the testing procedure.
To test the OCV (Oil Control Valve) power supply voltage, disconnect the bank 1 intake OCV connector with the ignition on and measure the voltage using a multimeter. You should observe battery voltage. If everything checks out, move on to the next step.
Now, start the engine and apply battery power to the OCV while it’s running. If the solenoid is functioning correctly, the engine will hesitate or stall. If there are no changes in engine operation, it might indicate a faulty OCV that needs to be removed for further testing.
Alternatively, you can use a scan tool to test the VVT operation. Activate the bank 1 intake OCV through the actuator test on the scan tool. If the engine hesitates, it confirms proper solenoid function. Otherwise, more tests are required.
To conduct an off-engine test, remove the bank one intake OCV, clean it meticulously, and visually inspect the solenoid. You can also perform an actuation test by supplying battery power to the OCV while listening for a clicking sound.
Lastly, measure the OCV internal resistance with a multimeter and compare it to the specifications in the workshop manual. If the OCV fails any of these tests, replace it with a brand new one. If the OCV is functioning correctly and the fault code persists, proceed to the next step.
Bank One Intake Camshaft Position Sensor Testing
Locate the camshaft position sensor installed at the end of the intake camshaft. This sensor reads the camshaft position and sends the signal to the PCM. Check the power supply signal, signal voltage (around five volts), and ground connections. Ensure the sensor is physically intact before moving on to the next step.
Crankshaft Position Sensor Testing
The crankshaft position sensor detects the crankshaft’s position and sends the corresponding signal to the PCM. There are two types of sensors: inductive and Hall-IC. Perform an internal resistance test using a multimeter to validate the sensor’s functionality. The resistance should match the specifications provided in the workshop manual. If the resistance differs, replace the sensor accordingly. For Hall-IC type sensors, follow the same procedure as the camshaft position sensor.
Testing the Intake VVT
Before removing the VVT, check the engine timing using an oscilloscope. Compare the crankshaft and camshaft position sensor waveforms with the specifications in the manual. Any deviation from the expected waveform at idle could indicate a timing correlation issue.
The intake VVT is normally locked at maximum retard when the engine is off. As soon as the engine starts and warms up, it should advance the intake camshaft. Failure to do so will trigger a correlation fault code.
To test the intake VVT, remove the intake camshaft and locate the advance and retard oil passages. By providing compressed air to the relevant oil galleries, you can assess the VVT’s functionality. When air is applied to the advanced oil gallery, the VVT should rotate if it is correctly locked at maximum retard. If the VVT fails this test, it needs to be replaced.
Verifying Engine Timing
Finally, check the engine timing. If the timing is incorrect or the timing chain is extended, it could lead to the fault code. Since you have already removed the camshaft, take the opportunity to inspect the timing chain and adjust the engine timing if necessary.
That’s a wrap! We hope this video provided you with valuable insights into testing and fixing the P0016 fault code. If you enjoyed this information, don’t forget to subscribe to our channel and share it with fellow car enthusiasts. For more engaging content like this, visit the Banking Blog. Stay tuned for our next video, where we’ll tackle another intriguing automotive topic.