P0017 Code: What You Need to Know About Crankshaft and Camshaft Correlation Issues

Ever had that pesky check engine light pop up on your dashboard? It can be a real head-scratcher, especially when you're faced with a cryptic code like P0017. This particular code, Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor B), might sound like technical jargon, but we're here to break it down for you in plain English. Let's dive into what this code actually means and what you should do about it.

What Exactly Does P0017 Mean

At its core, the P0017 code indicates that your car's computer, also known as the Engine Control Unit (ECU) or Powertrain Control Module (PCM), has detected a mismatch between the signals coming from the crankshaft position sensor and the camshaft position sensor for Bank 1, specifically Sensor B. Now, let's unpack that a bit.

Think of your engine's crankshaft as the main rotating assembly that turns your pistons up and down. The crankshaft position sensor keeps tabs on the crankshaft's speed and position. The camshaft controls the opening and closing of your engine's valves. The camshaft position sensor monitors the camshaft's speed and position. These two components need to be perfectly synchronized for your engine to run smoothly and efficiently.

The ECU relies on the information from these sensors to precisely time the ignition and fuel injection. When there's a problem with the correlation between these two signals, the P0017 code is triggered. The term "Bank 1" refers to the side of the engine that contains cylinder number one. "Sensor B" usually indicates the exhaust camshaft sensor, though this can sometimes vary depending on the vehicle manufacturer.

The core definition of P0017 remains the same across most vehicles, but different manufacturers may phrase it slightly differently.  For example, P0017 on Chevy models, including the Malibu, Equinox, and Colorado, often reads as “Crankshaft Position – Exhaust Camshaft Position Not Plausible.”  Hyundai may list it as Hyundai DTC P0017:00, while Ford, Toyota, and Mercedes-Benz vehicles may present similar variations of the code description.

Related Reading: Can OBD2 Scanner Damage ECU?

Common Symptoms of a P0017 Error

So, how do you know if your car is experiencing a P0017 issue? While the check engine light illuminating is the most obvious sign, you might also notice other symptoms, such as:

Rough running engine: Your engine might feel shaky or vibrate more than usual.

Difficulty starting the engine: It might take longer than normal to get your car started, or it might not start at all.

Loss of engine power: You might notice a decrease in acceleration and overall performance.

Poor fuel economy: Your car might be burning more fuel than it typically does.

Engine stalling: The engine might suddenly shut off while driving or idling.

Engine knocking or other unusual noises: You might hear strange sounds coming from the engine.

It's important to note that these symptoms can also be associated with other engine problems, so it's crucial to get a proper diagnosis to pinpoint the exact cause.

Potential Causes of a P0017 Code

Several factors can lead to a P0017 error code. Here are some of the most common culprits:

Faulty crankshaft position sensor: The sensor itself might be malfunctioning and sending incorrect signals.

Faulty camshaft position sensor: Similar to the crankshaft sensor, the camshaft sensor could be the source of the problem, which is more commonly observed in certain brands.  For instance, Chevy and GMC vehicles often see this code due to stretched timing chains.

Timing chain or belt issues: The timing chain or belt is responsible for synchronizing the crankshaft and camshaft. If it's stretched, worn, or has jumped a tooth, it can cause a correlation issue.

Problems with the variable valve timing (VVT) system: Many modern vehicles use VVT to optimize engine performance and efficiency.  Malfunctioning VVT solenoids or actuators can trigger a P0017 code, and in some brands—such as Hyundai and Kia—clogged oil passages in the VVT system are a common cause.

Low engine oil level or dirty oil: In some cases, low or dirty engine oil can affect the proper functioning of the VVT system.

Damaged wiring or connectors: The wiring or connectors leading to the crankshaft or camshaft sensors may be damaged, causing intermittent or incorrect signals.  In certain brands, such as Toyota and Ford, wiring or sensor failures are more commonly reported.

ECU/PCM issues: Although less common, a problem with the car's computer itself could trigger the P0017 code.

Diagnosing a P0017 Error

When you take your car to a mechanic with a P0017 code, they will typically follow a systematic approach to diagnose the problem. This might involve:

• Scanning the vehicle's computer: Using an OBD-II scanner to confirm the P0017 code and check for any other related trouble codes.
• Visually inspecting the sensors and wiring: Checking for any obvious signs of damage or loose connections.
• Testing the crankshaft and camshaft position sensors: Using a multimeter or oscilloscope to check the sensors' output signals.

• Checking the engine timing: This might involve physically inspecting the timing marks or using specialized tools.
• Inspecting the timing chain or belt: Looking for signs of wear, stretching, or damage.
• Evaluating the VVT system: Testing the VVT solenoids and actuators to ensure they are functioning correctly.
• Checking the engine oil level and condition: Ensuring the oil is at the correct level and is not excessively dirty.

Fixing the Issue: Common Repairs for a P0017 Code

The necessary repairs for a P0017 code will depend on the underlying cause. Some common fixes include:

• Replacing the faulty crankshaft position sensor: If the sensor is determined to be the problem, a replacement will be necessary.
• Replacing the faulty camshaft position sensor: Similarly, a malfunctioning camshaft sensor will need to be replaced.
• Replacing the timing chain or belt: If the timing chain or belt is stretched or damaged, it will need to be replaced to restore proper engine timing.
• Repairing or replacing VVT components: If the issue lies within the VVT system, the affected solenoids, actuators, or other components will need to be repaired or replaced.
• Performing an oil change: If low or dirty oil is suspected to be contributing to the problem, an oil change with fresh, high-quality oil might be recommended.
• Repairing or replacing damaged wiring or connectors: Any damaged wiring or connectors will need to be repaired or replaced to ensure proper signal transmission.
• Reprogramming or replacing the ECU/PCM: In rare cases, if the car's computer is the issue, it might need to be reprogrammed or replaced.

“For those comfortable with DIY car repairs, some users report that replacing the camshaft sensor and the AVCS (VVT) oil control valves can be done at home without engine removal, potentially saving over $1,000 in labor costs. Parts may cost around $250, but it’s crucial to change the oil and inspect all O-rings during installation.”

— Reddit user experience

Tips for Preventing Future P0017 Errors

While you can't always prevent a P0017 code from occurring, there are some steps you can take to minimize the risk:

• Follow your vehicle's recommended maintenance schedule: This includes regular oil changes and timing belt/chain replacements at the specified intervals.
• Use high-quality engine oil: Ensure you are using the correct type and viscosity of oil for your vehicle.
• Address any engine issues promptly: Don't ignore warning signs like rough running or unusual noises.
• Have your vehicle regularly inspected: Routine check-ups can help identify potential problems before they escalate.

Wrapping Up

The P0017: Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor B) code can be a sign of various underlying issues, ranging from faulty sensors to problems with the timing system. While it might seem intimidating, understanding what the code means and the potential causes can empower you to communicate effectively with your mechanic and ensure your vehicle gets the necessary repairs. Ignoring this code can lead to more serious engine problems down the line, so it's always best to address it promptly.

FAQs

Can I still drive my car with a P0017 code?
It's generally not recommended to drive your car with a P0017 code, as it can indicate a serious engine timing issue that could lead to further damage. It's best to get it checked out by a mechanic as soon as possible.

How much does it cost to fix a P0017 error?
The cost of repair can vary significantly depending on the cause of the P0017 code. Replacing a sensor might be relatively inexpensive, while a timing chain replacement can be more costly. It's best to get a quote from your mechanic after they've diagnosed the specific issue.

Is the P0017 code a serious problem?
Yes, the P0017 code indicates a problem with the correlation between the crankshaft and camshaft positions, which is crucial for proper engine operation. Ignoring this issue can lead to significant engine damage, so it should be taken seriously.