P0021 Error Code: Camshaft Position Timing Over Advanced (Bank 2)

The camshaft position timing over advanced (Bank 2), also known as error code P0021, is a generic code that deals with your vehicle’s variable valve timing system (VVT).

Over the years, the internal combustion engine has undergone significant advancements. One notable innovation is the incorporation of Variable Valve Timing (VVT).

With VVT, vehicles can achieve higher power or efficiency across different driving conditions.

The engine’s Powertrain Control Module (PCM) receives input from both the camshaft and crankshaft position sensors to determine the position of the shafts.

Based on this data, the PCM activates a VVT solenoid to apply oil pressure to an actuator at the end of the camshaft.

This action causes the actuator to alter the camshaft’s position, changing the engine’s valve timing.

If the position of the intake valve differs from the one pre-set by the PCM, it’ll throw the P0021 error code on the dashboard.

This error is primarily seen in various car models, including the Nissan Pathfinder, Ford F150, Nissan Altima, and so on. The problem is mainly found in modern cars with VVT incorporated into them.

This article will teach you everything you need about the Camshaft Position Timing Over Advanced (Bank 2) – Error P0021 code, including its meaning, symptoms, and causes.

Table of Contents

What Does Error Code P0021 Mean?

P0021 Code, “A” Camshaft Position Timing Over Advanced (Bank 2), is displayed when the intake camshaft position in Bank 2 is higher than the control module configured.

While the “A” value in the code describes the intake valve in most vehicles, it may also vary depending on your vehicle’s model, year, and make.

Also, you may need to check the car’s manual guide for specific information on what the P0021 code may signify. This is required because the code’s definition might also vary between manufacturers.

Causes of the P0021 Error Code

While checking for the causes of the code P0021, it’s essential to know that not all vehicles come with VVT, and even if they do, the symptoms may differ from other cars.

However, these are possible reasons why the check engine light will ignite with a camshaft position timing over advanced error.

Low engine Oil
Heavy engine oil
Damaged/Worn-out timing belt/chain
Faulty VVT actuator
Bad wire connections.
A failed timing chain tensioner
Problematic PCM
The oil valve control solenoid connected to Bank 2 of the camshaft is open or faulty.
A lousy timing valve control solenoid, etc.

As stated earlier, the causes of the trouble code are manufacturer-specific. Thus, the attention of a mechanic is needed to evaluate the cause correctly.

Symptoms of P0021 Error Code

Here are all the possible symptoms associated with code P0021:

Hard starting
Ignited check engine light
Stalling
Engine misfire
Rough Idling
A rattling noise from the engine
Increase gas mileage.

How to Diagnose the P0021 Code

You should take your car to a mechanic for proper diagnosis and repairs. These steps should be taken to Diagnose the exact cause of the code.

Visually inspect any wiring or connections on the vehicle.
Check if the correct engine oil is being used.
Use an OBD-II scanner to scan for codes and keep the record.
Clear the error codes on the system and perform a test drive.
If it persists, perform the manufacturer’s pinpoint test to get the root cause of the P0021 trouble.

How do I fix the error code P0021?

To get rid of the code P0021 on your vehicle, you can perform any of the following:

Clear the check engine light on the system and conduct a test drive.
Top up the oil to the engine and see if the engine light disappears after some time.
Change the oil filter.
Check and reconfigure the wiring harness to the oil control valve for the bank 2 intake camshaft.
Replace the OCV (oil control valve) for the bank 2 intake camshaft
Check the camshaft timing chain and phasers.