P0012 Code: Intake (A) Camshaft Position Timing

The P0012 code, like all other OBD2 codes, is a fault code that stands for camshaft timing misalignment on the Bank 1 engine.

This means that the camshaft has been advanced beyond what is recommended by the manufacturer. The ECU then signals an error message and triggers the check engine light to turn on.

In this article we will go over what can cause a P0012 code and how to fix it.

What Does the P0012 Code Mean?

The camshaft (s) is/are an essential part of the engine. They control the opening and closing dates of the intake valve and exhaust valve. In a gas-powered engine, the timing of when these valves open and close has an impact on how much fuel enters into the cylinder, which in turn affects power output. A gasoline engine with spark plugs needs more air to burn more fuel, but there is only so much air that a given cylinder can contain at one time. The amount of air in a cylinder is referred to as its “volume” or “displacement” (the volume being measured in liters).

There are two types of cam profiles: flat-tappet cams and roller cams. Flat-tappet cams use lobes that contact directly against lifters; This creates friction that slows down camshamp speed at high rpm range due to friction between contact surfaces (it would be like running with sandpaper under your shoes). Roller cams eliminate this issue because they do not contact anything other than its own bearings: instead, they ride on needle bearings inside their housing which allows them to turn faster without resistance from friction caused by contacting material(s).

What are the Common Symptoms of the P0012 Code?

Check Engine Light: The most obvious symptom of a P0012 code is the illumination of the check engine light (CEL) on the dashboard.

Poor Performance: If the camshaft position is not timed correctly, it can lead to poor engine performance, including reduced power and acceleration.

Rough Idle: Another symptom of a P0012 code is a rough or uneven idle, which can cause the vehicle to shake or vibrate.

Engine Stalling: In some cases, the engine may stall or shut off altogether due to the improper camshaft position timing.

Decreased Fuel Efficiency: When the camshaft position timing is off, the engine may consume more fuel than necessary, resulting in decreased fuel efficiency.

How to diagnose the P0012 code?

The first thing you need to know to diagnose the camshaft positioning sensor code P0012 is that it can be caused by numerous things. The most common cause of this code is a failed actuator solenoid, but there are many other possible causes. To help you pinpoint the exact problem, I’ve included a list of all the parts that could be responsible for this code and what they do below:

Camshaft Positioning Actuator Solenoid
Timing Chain/Belt (stretch or broken tensioner)
Timing Adjustment Mechanism (weak or damaged tensioner, stretch timing chain/belt)
Camshaft Sprocket (worn or damaged teeth)
Engine Oil Viscosity (contaminated with fuel or glycol)
Engine Air Filter (dirty)
Timing Chain/Belt Tensioners or Hydraulic Lifters

How to avoid getting a P0012 code?

Check your engine oil regularly, and don’t let it run low.
Change the oil when it’s time. Regular oil changes are essential to the performance of a vehicle with a variable valve timing system.
Don’t ignore the “check engine” light if it comes on. The P0012 code can be caused by something as simple as a loose gas cap, but it might also require expensive repairs that you won’t want to put off for long.
Get your car repaired if you hear any strange noises coming from under your hood. This includes any ticking or knocking sounds, or an unusually loud noise when starting up or revving the engine (sometimes referred to as “dieseling”). These could be early signs of damage to the timing system, which will only get worse over time if ignored.
Take care of your car in general. If anything seems wrong, get it checked out by a qualified mechanic ASAP.

How to Fix the P0012 Code?