P0017: Crankshaft Position – Camshaft Position Correlation

What Is P0017?

P0017 is an OBD-II generic code that stands for “Crankshaft Position – Camshaft Position Correlation (Bank 1 Sensor B).”

It signals a mismatch (from a timing issue) between the crankshaft and camshaft position sensor readings for the Bank 1 exhaust camshaft.

Here’s what happens: 

The camshaft opens or closes the intake and exhaust valves, allowing an air-fuel mixture to enter the engine cylinders and exhaust gases to exit. A spark ignites the mixture for combustion, which drives the pistons downward. The crankshaft converts the pistons‘ up-and-down motion into rotational force to turn the wheels.

The crankshaft position sensor (CKP sensor) and the camshaft position sensor (CMP sensor) must work harmoniously to help your car’s computer control the spark, fuel delivery, and timing changes. When they don’t, the engine doesn’t function properly, triggering the P0017 error code.

Some manufacturers, like GM or Chevrolet, define P0017 differently; Chevy describes it as “Crankshaft Position – Exhaust Camshaft Position Not Plausible.” 

Irrespective of this, the P0017 code generally means the powertrain control module (PCM) detects a misalignment between the crankshaft and the camshaft sensor’s timing signals.

What Triggers a P0017 Code?

Here are a few problems that may lead to a P0017 fault code:

1. Timing Chain or Timing Belt Issues

• Broken, stretched, or loose timing chain (or belt)
• Damaged belt tensioners or guides (a support structure that prevents misalignment and keeps the belt in its proper path)
• Timing belt skipping a tooth because of wear 
• Misaligned timing belt

2. Sensor and Actuator Issues

• Bad sensor (crankshaft or camshaft)
• Erratic camshaft and crankshaft position sensor signals
• Loose crankshaft or camshaft position sensor wiring or connections
• Shorted camshaft position (CMP) actuator solenoid (VVT solenoid) 
• Stuck CMP actuator in a position other than 0 degrees
• Defective variable valve timing due to a faulty VVT solenoid 
• Exhaust timing gear’s problem with the phaser, causing camshaft misalignment
• Defective camshaft or crankshaft reluctor wheel (tone ring)

3. Engine Oil Issues

• Low oil level or clogged oil filter
• Wrong engine oil viscosity
• Aerated or contaminated motor oil

4. Other Problems

• An improperly torqued crankshaft balancer 
• A missing crankshaft balancer bolt
• Clogged oil control valve filter 
• Faulty powertrain control module (PCM)

What Are the Common Symptoms of a P0017 Code

Some of the telltale signs of the P0017 trouble code include:

• Illuminated engine malfunction indicator lamp (MIL) or check engine light (CEL)
• Engine hesitation or starting trouble
• Reduced engine power
• Rough idle and erratic acceleration
• Rattling sounds from the engine
• Engine misfire
• Reduced fuel mileage

How Serious Is a P0017 Code & Can You Continue to Drive?

The P0017 error code indicates a serious issue with engine timing and should be addressed promptly.

While it is technically possible to drive with this code, doing so can worsen symptoms, such as rough idle, stalling, poor acceleration, and engine misfire. An unresolved timing issue or a camshaft misalignment can cause secondary problems like spark plug fouling and engine overheating.

Over time, this can lead to severe engine damage and costly repairs. 

How to Diagnose Code P0017

Diagnosing the P0017 trouble code involves accessing critical engine parts. If you have limited experience, attempting this on your own can be risky, as incorrect handling could lead to further engine damage.

That’s why it’s best to consult an auto repair mechanic for accurate troubleshooting. They may ask a couple of diagnostic questions first to narrow down the root cause and inspect various components to find an answer.

Here’s what they’ll do: 

1. Verify the engine code with a scan tool and look for any other OBD-II generic code. They’ll also view the freeze frame data to check under what conditions the codes were triggered. 
2. Inspect the camshaft and crankshaft position sensors for damage, test their output with diagnostic tools, and verify their alignment for accurate timing detection. 
3. Check the engine oil level and viscosity using a dipstick. 
4. Look for faulty or loose wiring in the camshaft position sensor, crankshaft position sensor, oil control valve, etc. 
5. Inspect the oil control valve (VVT solenoid) and other timing components in both engine banks for any issues. 
6. Use the scan tool to command the oil control valve on and off. This will help confirm if the camshaft sensor relays timing changes for the Bank 1 exhaust camshaft. 
7. Test the PCM to verify whether it’s sending and receiving accurate signals to and from the sensors.

Common Mistakes When Diagnosing the P0017 Code

Misdiagnosing the P0017 code can occur due to several common errors. These include:

• Neglecting wiring or connectors for damage or corrosion
• Replacing CKP or CMP sensors without proper testing
• Skippings tests on the VVT solenoid or camshaft phaser for faults
• Clearing error codes without analyzing freeze frame data or related codes
• Overlooking the possibility of ECM malfunctions or outdated software

Possible Repairs for P0017

The DTC P0017 has no single fix, as various issues can trigger it.

So, let’s look at some of the repairs your mechanic will perform: 

• Replace the camshaft position sensor on a failed camshaft bank
• Mend or replace the wiring connection to the cam sensor, crankshaft position sensor, or oil control valve
• Replace the timing gears — chain, belt, and guides for both engine banks
• Repair or replace a faulty oil control valve or cam sensor solenoid (VVT solenoid)
• Clean carbon buildup from engine pistons and valves (intake and exhaust)
• Replace the faulty engine control module (ECM) or PCM

Once the repair is complete, the mechanic will reset the fault code and do a test drive to see if the DTC P0017 returns.

NOTE: The error code may persist if a new sensor (camshaft or crankshaft) is not installed correctly. Therefore, it is best to seek professional assistance rather than attempt DIY repairs.

Estimated Costs for P0017 Repairs

Here are the average expenses for some P0017 code-related repairs: 

• CMP actuator solenoid valve replacement: $25 to $125
• Crankshaft or camshaft tone ring replacement: $30 to $300
• Belt tensioner replacement: $250 to $300
• Camshaft sensor replacement: $185 to $320
• Crank sensor replacement: $200 to $400
• Wiring connection repair: $100 to $1,500
• Timing chain or timing belt replacement: $400 to $1,950