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P0017 Code: Diagnose Crank & Cam Sync Issues with MK900BT

When the check engine light comes on, the last thing a driver wants to see is a confusing code—like P0017. This code stands for "Crankshaft Position - Camshaft Position Correlation Error (Bank 1 Sensor B)" and often indicates a problem with the engine's timing system.

Don't worry, this article will help you fully understand the true meaning of P0017, common causes, and repair solutions, as well as how to quickly identify the root cause using the Autel MK900BT Smart Scanner.

A P0017 code may be detected when the check engine light is on.

A P0017 code may be detected when the check engine light is on.

What is the P0017 Code?

P0017 is a timing signal desynchronization error detected by the engine control module (ECU/PCM).

It indicates that the signals between the crankshaft sensor and the camshaft sensor have deviated from the expected synchronization range.

Simply put, the crankshaft drives the pistons, while the camshaft controls the opening and closing of the intake and exhaust valves. When these two movements are out of sync, the engine's combustion, ignition, and fuel injection timing are disrupted, resulting in unstable operation, difficulty starting, and even stalling.

"Bank 1" typically refers to the side containing cylinder number 1, and "Sensor B" often refers to the exhaust camshaft sensor. However, the definitions vary slightly between brands and models.

The descriptions of this code may differ slightly on Chevrolet, Hyundai, Toyota, Ford, and other models, but the underlying issue is the same: a disruption in the timing between the crankshaft and camshaft.

P0017 occurs when the crankshaft and camshaft signals don’t align correctly.

P0017 means the crankshaft and camshaft sensor signals are out of sync.

Common Symptoms of P0017

In addition to the engine check light, your vehicle may also exhibit the following symptoms:

  • Engine difficulty starting: The engine will not ignite after turning the key.
  • Idle speed jitter or vibration: The engine experiences vibrations or rpm fluctuations while running.
  • Noticeable loss of power: Acceleration is weak and slow.
  • Increased fuel consumption: Combustion efficiency is reduced, resulting in increased fuel consumption.
  • Engine knock or noise: It sounds like metallic knocking.

These symptoms can also be caused by other issues, so using a professional scanner to read the fault data is key to determining the true cause.

P0017 may cause higher fuel consumption.

One sign of P0017 is increased fuel use.

Why Does P0017 Appear?

The following are common causes of this code:

  1. Crankshaft or camshaft sensor failure
    • Sensor aging or internal circuit damage can cause signal distortion.
  2. Timing chain/belt stretching or skipping teeth
    • Chain wear or tensioner slack can cause camshaft signal lag.
  3. Variable Valve Timing (VVT) System Malfunction
    • A clogged solenoid valve or a stuck actuator can disrupt timing adjustment.
  4. Engine Oil Problems
    • Excessive oil contamination or insufficient oil pressure can affect the VVT system's oil circuit control.
  5. Abnormal wiring connections
    • Loose sensor connectors, damaged or corroded wiring harnesses.
  6. ECU Software Problems
    • In rare cases, internal ECU calculation errors can also trigger P0017.
Worn chains or loose tensioners may delay the camshaft signal.

Camshaft signal lag can result from chain wear or a loose tensioner.

How to Quickly Diagnose P0017 with the Autel MK900BT

The Autel MK900BT is an intelligent automotive diagnostic tool for DIY car owners and professional technicians. It supports over 40 service functions and full system diagnostics, accurately reading and clearing all OBD-II fault codes, including P0017.

Instructions for use:

  1. Connecting to Bluetooth V1 VCI

    The MK900BT uses wireless Bluetooth connectivity, eliminating the need for tangled cables.

  2. Enter the Diagnostics Menu → Powertrain (PCM)

    Select [Read DTCs] to confirm whether P0017 appears.

  3. Use the Data Streaming function to compare signals.

    Monitor the crankshaft and camshaft signal waveforms in real time to check for any offset.

  4. Perform an active test (Bi-Directional Control).

    Activate the VVT solenoid valve and check for normal response.

  5. Read freeze frame data.

    Analyze engine speed, load, temperature, and other data at the moment the problem occurs.

Compared to standard scanners, the MK900BT can more accurately pinpoint the root cause of the problem and supports recording and exporting diagnostic reports, helping technicians quickly identify repair options.

Common Repair Options

Depending on the diagnostic results, repairs may include:

  • Replacing a faulty crankshaft or camshaft position sensor;
  • Replacing a stretched or skipped timing chain;
  • Cleaning or replacing the VVT solenoid and actuator;
  • Replacing the engine oil and filter to restore system oil pressure;
  • Repairing damaged wiring harnesses or connectors;
  • In rare cases, upgrading or replacing the ECU module.

Some owners have shared that after confirming the issue using the Autel MK900BT, they successfully cleared the P0017 error by simply replacing the VVT solenoid and engine oil, a process that took less than 20 minutes.

Use Autel scanner to test vvt data.

Use Autel scanner to test vvt data.

How to Prevent P0017 from Occurring Again

  1. Change your engine oil regularly (recommended every 5,000-8,000 km or as recommended by the manufacturer)
  2. Use high-quality engine oil and filters to keep the VVT system clean
  3. Check the timing system periodically, including chain tension and guide rail wear
  4. Perform regular system inspections with an Autel scanner to detect potential problems early
  5. Avoid ignoring early engine noises or fault lights

Summary

P0017 indicates a desynchronization between the crankshaft and camshaft position signals, a critical issue in the engine timing system.

Ignoring this code can lead to severe internal engine wear or valve impact on the piston.

Using the Autel MK900BT Smart Scanner, you can:

  • Quickly read and clear the P0017 code
  • Analyze whether the crankshaft and camshaft signals are synchronized
  • Verify the VVT system through proactive testing
  • Perform preliminary diagnosis at home, significantly reducing repair time and costs

If you frequently perform maintenance on your vehicle yourself, the MK900BT is one of the most worthwhile diagnostic tools you can invest in your garage.

Frequently Asked Questions (FAQs)

Q: Can I still drive my car if it has a P0017 fault code?

Continuing to drive is not recommended. P0017 involves the engine timing system, and if the problem worsens, it can cause serious mechanical damage.

Q: How much does it typically cost to repair a P0017?

It depends on the problem. Replacing the sensor costs approximately $200–400, while replacing the timing chain can cost over $1,000.

Q: Can the Autel MK900BT clear a P0017 fault code?

Yes. The MK900BT not only reads and clears a P0017 fault code, but also helps identify the root cause through real-time data streaming, waveform analysis, and proactive testing.

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