P0017 on 2015 Chevrolet Malibu: Crank/Cam Correlation Causes and Fixes

What's Unique About the 2015-2015 Chevrolet MALIBU

The Ecotec engine family used in the 2015 Malibu is known for timing chain issues. These chains can stretch over time, causing correlation codes like P0017. A Reddit user with an '09 Malibu 2.4L reported P0016 and P0017 codes, which are often seen together when the chain is the root cause. Additionally, the brake vacuum pump is driven by the exhaust camshaft on the 2.5L engine; a failing pump can shatter and potentially cause timing correlation problems, as noted in one owner complaint where P0017 and P0014 appeared with a "SHATTERED" vacuum pump. Low or dirty oil is particularly problematic, as it can cause the VVT solenoids that control cam timing to stick or fail.

Diagnostic Flowchart

Tap your situation to follow the diagnostic path that matches what you're seeing on this vehicle.

Symptoms You May Notice

• Check Engine Light is on
• Rough or unstable idle
• Engine stalling or cutting out
• Reduced engine power and poor acceleration
• Engine cranks but will not start.
• Rattling noise from the engine, especially on startup.
• Engine running rough, especially on startup.
• Sluggish performance, feeling like the transmission is stuck in low gears.

Most Likely Causes

1. Stretched Timing Chain 🔴 High Probability → Shop Engine Timing Chain The Ecotec engine family has a known history of premature timing chain stretching and guide failure. A user on a Chevy Equinox forum with a similar 2.4L engine and 140k miles found plastic shavings from a ground-away timing chain guide clogging the VVT solenoid screens, leading to P0017 even after a full timing job. An owner of a 2011 Malibu reported P0016/P0017 codes due to a broken timing chain guide at only 67,000 miles.
   How to confirm: A mechanic can use an oscilloscope to compare the crankshaft and camshaft sensor signals against a known-good waveform. A significant deviation indicates a timing issue. Physical inspection requires removing the timing cover to check for chain slack, broken guides, or a failed tensioner. In one documented case, a technician could nearly lift the chain off the sprocket by hand, confirming extreme stretching.
   Typical fix: Replace the timing chain, tensioners, guides, and sometimes the camshaft phasers. This is a labor-intensive job with an estimated cost between $1,027 and $1,289. 🎬 Watch this walkthrough of a Malibu timing chain replacement.
   Est. part cost: $90-$300
2. Faulty Exhaust Camshaft Actuator Solenoid (VVT Solenoid) 🟡 Medium Probability → Shop Engine Camshaft These solenoids operate using engine oil pressure. If the oil is dirty or low, the fine mesh screens on the solenoids can clog with sludge or debris (like plastic from failing chain guides), causing them to stick or respond slowly.
   How to confirm: A common diagnostic trick is to swap the exhaust solenoid with the intake solenoid. Clear the codes and drive the vehicle. If the code changes to P0016 (Intake Camshaft Position Correlation), the solenoid is confirmed to be faulty. You can also remove the solenoid and inspect its screen for debris. A resistance test with a multimeter should show a reading between 8 and 13 Ohms; readings outside this range indicate a bad solenoid. 🎬 See how to test and replace your VVT solenoids.
   Typical fix: Replace the exhaust camshaft actuator solenoid. It's often recommended to replace both intake and exhaust solenoids at the same time and perform an engine oil flush and change.
   Est. part cost: $25-$60
3. Low or Dirty Engine Oil 🟡 Medium Probability The Variable Valve Timing (VVT) system, which adjusts the camshafts, is entirely dependent on clean oil at the correct pressure. Low oil levels or old, sludgy oil will starve the system and cause timing correlation faults. One owner of a 2016 Malibu with a 1.5L engine and P0017 noted the car had no oil on the dipstick.
   How to confirm: Check the oil level on the dipstick and inspect its condition. If the level is low or the oil is dark and gritty, this is a likely contributor.
   Typical fix: Perform an oil and filter change with the correct viscosity oil. An engine flush may help clean sludge from VVT components. If the code returns, another component (like a solenoid) was likely damaged by the oil issue.
   Est. part cost: $40-$80
4. Faulty Exhaust Camshaft Position Sensor ⚪ Low Probability → Shop Engine Camshaft Position Sensor
   How to confirm: Use a scan tool to monitor the live data from the sensor. If the signal is erratic, absent, or doesn't change with RPM, the sensor is likely bad. You can also test the sensor's circuit for proper voltage and ground with a multimeter.
   Typical fix: Replace the exhaust camshaft position sensor. It is often recommended to replace both intake and exhaust sensors at the same time.
   Est. part cost: $38-$75

Rare But Worth Checking

• Failed Brake Vacuum Pump: On the 2.5L engine, the vacuum pump is driven by the exhaust camshaft. An owner complaint for a similar model year reported a 'SHATTERED' vacuum pump in conjunction with P0017 and P0014 codes, suggesting a catastrophic failure of the pump can affect cam timing. GM TSB 21-NA-268 also instructs technicians to inspect the vacuum pump drive lugs for damage when diagnosing these codes.
• Damaged Camshaft Reluctor Wheel/Tone Ring: → Shop Engine Camshaft The sensor reads notches on a wheel (reluctor) attached to the camshaft. If this wheel is damaged, cracked, or has physically slipped/rotated on the camshaft, it will send incorrect position information, triggering P0017 even if the mechanical timing is perfect. GM TSB #PIP4548F (and later revisions like G) specifically addresses this possibility, requiring visual inspection or oscilloscope analysis to confirm. TSB 21-NA-268 provides a specific visual inspection procedure for the exhaust cam reluctor on related engines.
• Loose Intake Manifold Bolts: While more commonly associated with lean codes like P0171, a significant vacuum leak from a loose intake manifold (a known issue on the 2.5L engine) can sometimes cause such poor running conditions that timing correlation codes appear as a secondary fault.

Diagnosis Steps

1. Check the engine oil level and condition. Top off or change the oil if it is low or dirty.
2. Use an OBD-II scanner to check for any other accompanying codes. Note codes like P0014 or P0016, which are common with P0017.
3. Observe live data on the scanner. Watch the desired vs. actual positions for the exhaust camshaft. A large, persistent discrepancy points to a problem. In one documented case, the actual position was stuck at 22 degrees advanced.
4. Inspect the wiring and connectors for the exhaust camshaft position sensor and the VVT solenoid for any damage or corrosion.
5. Swap the exhaust and intake VVT solenoids. They are identical and easily accessible on top of the engine. Clear the codes and run the engine. If the code changes to P0016, the solenoid you moved is bad and needs replacement.
6. If the code persists, test the camshaft position sensor and its circuit with a multimeter or oscilloscope.
7. If sensors and solenoids test good, use an oscilloscope to compare the cam and crank sensor patterns to a known-good waveform. This can definitively prove if the mechanical timing is off due to a stretched chain or a slipped reluctor ring without immediate teardown.
8. If an oscilloscope confirms a timing issue, the next step is a mechanical inspection. This involves removing the engine's timing cover to check for a stretched timing chain, worn/broken guides, or a failed tensioner. This step is labor-intensive.
9. Per TSB #PIP4548F, if the timing chain appears correct, further inspection of the camshaft reluctor wheel for slippage is necessary. This involves checking its alignment relative to the camshaft lobes.

Parts You'll Likely Need

• Engine Timing Chain Kit — A stretched timing chain is the most probable and serious cause of P0017 on this engine. A kit typically includes the chain, guides, and tensioners. Aftermarket kits are widely available.
  Trusted brands: ACDelco, Cloyes
  OEM price range: $150-$250
  Aftermarket price range: $90-$180
• Exhaust Camshaft Position Actuator Solenoid (OEM #12655421) — This solenoid controls the exhaust camshaft's timing. It's a common failure item due to oil contamination and is a relatively easy and inexpensive part to replace as a first step in diagnosis.
  Trusted brands: ACDelco (OE), Dorman, A-Premium
  OEM price range: $65-$87
  Aftermarket price range: $25-$50

Related Codes That Often Appear With This One

• P0014 — This code means 'Exhaust Camshaft Position Timing - Over-Advanced'. It frequently appears with P0017 because both codes relate to the exhaust cam's timing. This combination strongly suggests a problem with the exhaust VVT solenoid, the cam phaser, or the base timing chain. Multiple NHTSA complaints cite these two codes together.
• P0016 — This is the equivalent correlation code for the intake camshaft. If you see P0016 and P0017 together, it points towards a base timing issue affecting both camshafts, such as a stretched timing chain or a problem with the crankshaft position sensor/reluctor ring.

Technical Service Bulletins (TSBs) & Recalls

• PIP4548F: Advises inspection of the camshaft reluctor wheel if P0016/P0017 codes are present on a properly timed engine.
• 12-06-01-009F: Discusses the availability of timing chain kits for repairing stretched chains that cause codes like P0017.
• PIP3423P: Instructs technicians to inspect for loose timing chains or tensioners when various correlation codes, including P0017, are set.

Platform-Specific Known Issues

• A GM Technical Service Bulletin (TSB #PIP4548F) exists for conditions where P0016 and/or P0017 are set on an engine that appears to be properly timed, or for a crank-no-start condition. It advises technicians to inspect the respective camshaft components.
• An owner of a similar model reported P0017 and P0014 codes and mentioned their mechanic found a 'SHATTERED' vacuum pump, which is driven by the exhaust cam on the 2.5L engine.
• Another owner complaint linked P0017 and P0014 to a needed camshaft replacement.
• A complaint on an older 2011 Malibu with the 2.4L Ecotec (an engine with similar architecture) cited codes P0016 and P0017 as a direct result of a broken timing chain guide, highlighting the known timing system weakness in this engine family.

Mechanic-Grade Diagnostic Values

• Camshaft Position Actuator (VVT) Solenoid Resistance — expected: 8 to 13 Ohms. Failure: A reading outside this range, or a meter that bounces around erratically, indicates a faulty solenoid.
• Camshaft Position Sensor (3-wire Hall Effect) Signal Voltage — expected: A square wave signal switching between 0V and 5V as the engine is cranked.. Failure: No signal, or a signal that does not switch, indicates a faulty sensor or wiring issue.

Scan Tool Commands That Help

• GDS2 (GM Global Diagnostic System 2): Camshaft Position Actuator Control — This bidirectional command allows a technician to manually command the VVT solenoids to advance or retard timing while monitoring the engine's response. It's used to confirm if the solenoid and phaser are mechanically capable of responding to ECM commands, helping to isolate a faulty solenoid, clogged oil passage, or failed phaser.
• Tech 2 / High-End Scanner: CASE (Crankshaft Angle Sensor Error) Relearn — This procedure is required after replacing the crankshaft position sensor or the ECM. While not a direct fix for P0017, failing to perform a CASE relearn when necessary can cause other timing-related codes and rough running conditions.

Wiring & Ground Locations

• G101 / G106 — Located on the lower front of the engine block, with a jumper to the center of the frame cross rail under the crank pulley.. This is a primary ground point for the Engine Control Module (ECM) and Transmission Control Module (TCM). A poor connection here can cause erratic behavior and false codes from any engine sensor, including the cam and crank sensors.
• G102 — Located at the left rear of the engine.. This ground is for the ignition coils. While not directly related to P0017, a poor ground here can cause misfires and rough running that might complicate diagnosis.
• ECM Connector X1 (2.5L LCV) — At the Engine Control Module.. Specific pins on this connector are critical. For example, Pin 57 is the Camshaft Position Sensor signal, and Pin 72 is the control for the Intake Camshaft Position Actuator. Verifying signal integrity directly at the ECM connector is a key step to rule out wiring harness issues between the sensor/actuator and the computer.

Real Owner Repair Stories

• GMTNation Forum User (4.2L I6 (similar VVT system principles)) — Persistent P0017 code, engine running okay but MIL on for emissions inspection.
  ❌ Tried (didn't work) Replaced VVT solenoid, Replaced camshaft position sensor, Replaced crankshaft position sensor, Replaced timing chain, guides, and cam phaser
  ✅ What actually fixed it The user's issue was unresolved in the thread, but the discussion highlights the necessity of a CASE Relearn procedure with a Tech 2 scanner after replacing the crankshaft position sensor, and the high probability of a timing chain being off by one tooth even after replacement.

OEM Part Supersession History

• 12655421 (Exhaust VVT Solenoid) → 12679100 — Standard part revision and improvement by the manufacturer.
• 12655420 (Intake VVT Solenoid) → 12679099 — Standard part revision and improvement by the manufacturer.