If other codes are present, they must be addressed first.
#12 gti camshaft variable valve timing solenoid code
Scan your vehicle to verify P0024 is the only code present. STEP 1: USE FIXD TO ENSURE NO OTHER ENGINE CODES ARE PRESENT. Tools/parts needed (our top picks from Amazon): This repair should not be attempted by beginner DIYers. Complete diagnosis may require some specialized equipment beyond what the FIXD Sensor can provide, but for the most part, this diagnosis and repair can be attempted by beginner DIYers. If you’d like to try to fix code P0024 at home without throwing money at parts, you’ll want to follow the steps below for proper diagnosis.
Oil Control Valve/Variable Valve Timing Control Solenoid $300-$400. For each possible repair, the estimated cost of repair includes the cost of the relevant parts and the cost of labor required to make the repair. When it comes to making repairs associated with the P0024 code, one or more of the below repairs may be needed to solve the underlying issue. From there, a shop will be able to give you an accurate estimate for repairs to fix your P0024 code. Many, if not most, shops will apply this diagnosis fee to any required repairs if you have them perform the repairs for you. Depending on the shop’s labor rate, this typically costs somewhere between $75-$150. If you take your car to a shop for diagnosis, most shops will start with an hour of “diag time” (the time spent in labor diagnosing your specific issue). > Find a RepairPal Certified Shop Near You How Much Does It Cost to Fix Code P0024? These shops can not only help you figure out what’s going wrong before you waste time and money on the wrong parts, but they also offer a minimum 12-month, 12,000-mile warranty and stand behind all their estimates with guaranteed fair pricing. If the sensors are all reading correctly and you’re not comfortable further diagnosing this issue at home, we recommend finding a RepairPal-certified shop to pinpoint the problem and give an accurate estimate for repairs. Using the live data function of the FIXD sensor and app allows you to read and analyze engine data to properly diagnose a P0024 code. With a P0024 code, the first step is to get it properly diagnosed to figure out what is causing the issue with the camshaft timing. Continuous oil flow to Variable Camshaft Timing chamber. Camshaft phaser is seized in the advanced position. Camshaft variable timing solenoid failure. When trouble code P0024 is set, it means that the exhaust camshaft in Bank 2 is more advanced than the ECM has told it to be. 
The camshaft(s) is(are) adjusted by the ECM through the use of an oil control valve(s) (OCV) also called variable valve timing control solenoid valves. The variable valve timing system increases fuel economy and engine performance by regulating when the intake and exhaust valves are opened and closed. Continuing to drive the vehicle in this condition can cause severe damage to multiple internal engine components. The most common problems consist of increased engine stalling, rough engine idle, lowered fuel economy, and rattling/knocking noises from the engine.
Diagnosis: This trouble code severely impacts the drivability of your vehicle. Repair Urgency: Fix this code immediately to prevent serious engine damage. Issue Severity: SERIOUS – Stop driving immediately. P0024 definition: Exhaust Camshaft Timing- Over-Advanced Bank 2. This valve sits next to the hydraulic chain tensioner – intake side. This leads into the system getting stuck and feeding less or more pressure into the camshaft. The solenoid valve gets contaminated with dirt that accumulates from the oil residues over time. Problem 0 – Stuck or malfunctioning oil control solenoid If you want to read more on the system, from the people who design and produce it, you can check Delphi: 
Which means it can cause undetectable trouble when something malfunctions. There are no pressure sensors providing feedback about what goes on into the cam timing mechanism with regards to oil. The whole system after the cam oil pressure solenoid valve is purely mechanical. The cam timing changes depending on the oil pressure inside the cam phaser. The cam phaser is the adjusting mechanism which controls intake cam timing. This valve controls the oil pressure that reaches the cam phaser. Oil pressure from the oil pump goes into a solenoid valve on the engine block. THP (Prince) engine cam shaft and variable cam timing mechanism – you can see the cam phaser to the right of the camshaft
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