P0008 Code: Engine Position System Performance Bank 1

The P0008 code indicates an issue concerning the position of the camshaft and crankshaft. In an internal combustion engine, the timing between these two is crucial as it helps determine the efficiency of the engine. If your OBD-II scanner registers this code, you must address it immediately.

What does diagnostic code P0008 mean? What are its symptoms and causes? Read on to learn the answers to these questions and more.

What Does the P0008 Code Mean?

Diagnostic trouble code (DTC) P0008 stands for “Engine Position System Performance Bank 1.” It sets when the car’s primary computer, often referred to as the power control module (PCM), detects that the crankshaft and camshaft are out of sync.

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Pro Tip: A caveat concerning this particular code is that almost no vehicle lists this code, but there are other similar codes that mean nearly the same thing on several platforms.

The camshaft sensor sends a signal to the PCM that identifies the right time to fire the fuel injectors (and on some vehicles, fire the spark plugs). To ensure that the engine is timed properly, the PCM tests for misalignment between the camshafts on one bank of the engine and the crankshaft. The PCM may register the trouble code if the camshaft is misplaced relative to the crankshaft’s position.

This DTC could appear in a vehicle that has other related codes such as P0009, P0016, P0017, P0018, and P0019.

The P0008 code has many possible causes, from a worn timing chain to a defective variable valve timing actuator. This can make it difficult to determine its exact cause. Let your mechanic troubleshoot the issue if you are not confident with addressing the problem yourself.

If you do decide to troubleshoot the issue yourself, you’ll need to refer to factory repair information or a repair manual to know the correct steps and procedures. Read our technical discussion about crankshaft and camshaft for more information that can help you fix codes like P0008.

What are the Possible Causes of the P0008 Code?

The P0008 code can stem from numerous issues that may involve the components responsible for keeping the crankshaft and camshaft in sync. Below are the most common reasons the PCM has set code P0008:

• Loose or stretched timing chain
• Faulty or displaced crankshaft reluctor wheel (select General Motors vehicles have a technical service bulletin for this concern)
• Timing chain tensioner or guides issues
• Low engine oil level
• Faulty variable valve timing actuator (phaser)
• Faulty variable valve timing solenoid (oil control valve)

What are the Common Symptoms of the P0008 Code?

You might experience one or more of the symptoms listed below if your OBD-II scanner logged the P0008 code. OBD P0008 shares some of its symptoms with codes like P0009, P0016, P0017, and so on. Its warning signs include:

• Rough running and poor acceleration
• Increased fuel consumption
• Diminished power
• Rattling noise from the engine
• Engine may not start

How to Diagnose the P0008 Code

The P0008 code has many possible causes, from a worn timing chain to a defective variable valve timing actuator. This can make it difficult to determine its exact cause. Let your technician troubleshoot the issue if you are not confident with addressing the problem yourself.

Technicians will use an oscilloscope to examine the crank and cam sensor pattern the ECM/PCM is reading while the engine is running. Analyzing the cam/crank signals typically requires a full 720 degree capture of the crankshaft as shown below (blue trace), with both camshaft sensor traces (green and red) captured during 360 degrees of each camshaft rotation. Professional technicians will have a library of these patterns for comparison at various camshaft angles commanded by the ECM/PCM, because the pattern varies widely from one automaker to the next.

How to Fix the P0008 Code

The struggle to narrow down what triggered the P0008 code is not the only challenge DIYers must overcome to fix the issue. They must also determine the solution that addresses its exact cause that is specific to their vehicle’s make and model. Otherwise, they’ll risk worsening the problem.

Use online auto repair resources and guides to identify the confirmed fixes for the P0008 code for your vehicle. Double-check your owner’s manual before attempting any solutions.

If you are looking for more in-depth information about factory repair to resolve the DTC and any other future issue, consider investing in an ALLDATA single-vehicle subscription. Don’t hesitate to ask your mechanic for help if you are uncertain of anything.

Shopping for Parts Needed to Clear a P0008 Code

A variety of things could cause this trouble code to be logged by your vehicle. In some cases, you’ll need to replace faulty parts to restore your vehicle’s performance. Whether you need to replace a worn timing chain or a defective variable valve timing solenoid, CarParts.com makes shopping for the parts you need quick and easy.

All items in our catalog are sourced from today’s top parts manufacturers. These components are engineered to OE specifications in world-class facilities to ensure their reliability and performance. By buying them in bulk, we’re able to pass on the savings to you.

We designed our website to make your shopping experience as seamless and hassle-free as possible. Use our vehicle selector to check for fitment, toggle our filters to browse by brand or price range, and place your order through our secure payment portal. The best part is that you can expect your order to arrive at your doorstep in a matter of days.

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Products Mentioned in this Guide

Camshaft Camshaft Position Sensor Timing Chain Timing Chain Guide Timing Chain Tensioner Cam Phaser