P0336 Code: Chevrolet Cruze (2016-2019) - Causes, Symptoms & Fixes

P0336 on a 2016–2019 Chevrolet Cruze: Comprehensive diagnostic guide

Note on data sources

• Real NHTSA data for this model/year combination shows: No NHTSA owner complaints found for this issue.
• No recalls found in NHTSA database.
• Data limitations: The absence of complaints or recalls in the provided dataset does not guarantee that the fault cannot occur in the real world. The guide uses general OBD-II knowledge and typical Cruze behavior to outline diagnostic steps and repairs.

CODE MEANING AND SEVERITY

• Meaning: P0336 = Camshaft Position Sensor “A” Circuit Range/Performance. This indicates the camshaft position sensor signal is out of expected range or not transitioning properly, suggesting a problem with the sensor, its circuit, or timing reference.
• Bank/location: In most four-cylinder GM engines used in the Cruze (and similar GM inline-4 platforms), this refers to the Camshaft Position Sensor (CMP) sensor on Bank 1 (the only bank in a typical 4-cylinder). Some engines use “Sensor A” naming for the primary CMP.
• Severity and drivability:
  • The MIL (check engine light) is typically illuminated.
  • Engine timing reference issues can cause rough idle, misfires, hesitation, decreased power, stalling, or no-start conditions.
  • If the timing mechanism is involved (timing chain tensioner/slack) and the timing shifts sufficiently, this can lead to valve-to-piston interference in interference engines. The Cruze’s 1.4L turbo and related variants are generally interference engines, so significant timing issues can cause severe damage if not corrected.
  • In many cases, you’ll see P0336 accompanied by other misfire or sensor codes (e.g., P0335, P0340, P0300, etc.), but P0336 can appear as a standalone fault in some scenarios.

COMMON CAUSES ON CHEVROLET CRUZE

• Faulty camshaft position sensor (CMP) itself.
• Damaged, corroded, or loose CMP sensor electrical connector or wiring harness (voltage reference, signal wire, or ground path compromised).
• Oil contamination or debris on the CMP sensor or its mounting area.
• Wiring insulation damage (chafed wires, pinched harness) or a short to ground/voltage on the CMP circuit.
• CMP sensor supply or ground issues (damaged ECU reference or poor engine ground).
• Timing-related issues:
  • Timing chain slack, stretched chain, or a failing tensioner/guide causing inaccurate cam timing reference.
  • Variable cam timing (VVT) actuator problems in some configurations leading to erratic CMP readings.
• PCM/engine control software issues (less common, but possible with updates or anomalies).

SYMPTOMS

• Check engine light (MIL) is ON.
• Engine runs poorly: rough idle, misfires, hesitation, or stalling.
• Decreased acceleration or power, especially at low to mid RPM.
• Rough running when starting from cold or after warmup.
• In some cases, no-start or hard-start conditions.
• Potential irregular fuel economy changes.
• No obvious mechanical noises specifically from the CMP area, but timing issues may produce related symptoms if chain/tensioner is involved.

DIAGNOSTIC STEPS

Note: Always start with a scan tool, and document freeze-frame data and any additional codes.

Step A – Confirm the code and context

• Use an OBD-II scan tool to confirm P0336 and check for other codes (P0335, P0340, P0337, P0339, P030x, etc.).
• Check Freeze Frame data for RPM, load, fuel trims, and sensor readings at the time the code was stored.

Step B – Visual inspection

• Inspect the CMP sensor and its connector for damage, corrosion, oil contamination, or loose pins.
• Inspect the CMP wiring harness for chafed insulation, exposed conductors, or signs of heat/oil exposure.
• Look for oil leaks around the CMP sensor area and timing cover; oil contamination can affect readings.
• If equipped, inspect the timing chain area for obvious wear or misalignment (without doing a full timing service yet).

Step C – CMP sensor and circuit checks

• Verify 5-volt reference and ground:
  • With the ignition on (engine off), backprob the CMP sensor connector to confirm the 5V reference at the sensor signal/ground circuit (as specified in the factory service manual). Then verify a solid ground at the CMP ground circuit.
• Check the signal circuit and continuity:
  • With the harness disconnected, inspect resistance of the CMP signal wire to the PCM/ECU input (per service manual). Look for open or short circuits.
• Inspect for sensor response:
  • Using a scope or a capable scanner, observe the CMP sensor signal waveform while rotating the engine or cranking. You should see clean, periodic pulses corresponding to camshaft position events. A flat line or extremely erratic waveform indicates a faulty sensor or wiring issue.

Step D – Mechanical timing check (if indicated)

• If wiring and sensor integrity are confirmed good, assess whether the timing reference is accurate:
  • For engines with timing chains, a timing misalignment can cause false CMP readings. This typically requires removing parts (timing cover/valve cover) to verify timing marks and chain tensioner operation.
  • If you suspect timing chain slack or jump, do not drive aggressively; mis-timed ignition can cause valve damage. This step is best performed by a qualified technician.

Step E – Cross-check with related systems

• If P0336 persists after CMP replacement or wiring repair, consider P0335 (crankshaft position) or intermittent CMP faults; sometimes a shared, high-impedance path or a PCM issue can mimic P0336.
• Check for software/ECU updates from GM that address cam timing or CMP sensor behavior for the Cruze model year.

Step F – Validation after repair

• Clear codes and perform a test drive to confirm the fault does not return.
• Monitor CMP signal with the scan tool during idle and light throttle. Recheck for any reoccurrence of P0336 or other related codes.

RELATED CODES

• P0335 – Crankshaft Position Sensor “A” Circuit
• P0337 – Camshaft Position Sensor “A” Circuit Low Input or related intermittent condition (varies by model)
• P0338 / P0339 – Camshaft Position Sensor Circuit High/Intermittent (if the Cruze variant supports multiple cam sensors or related circuits)
• P0300 – Random/Multiple Cylinder Misfire Detected (can accompany cam timing faults)
• P0340 – Camshaft Position Sensor Circuit Malfunction (sometimes observed if a system-wide CMP issue exists)
  Note: The exact code family and behavior can vary by engine variant; use the scan tool’s freeze-frame and live data to interpret.

REPAIR OPTIONS AND COSTS (2025 PRICES)

Prices are approximate and depend on locale, shop rate, and whether you use OEM vs. aftermarket parts.

A. Do-it-yourself (DIY) options

• CMP sensor replacement (sensor and connector kit): Parts typically $20–$80. Most Cruze CMP sensors are a straightforward bolt-in replacement; labor is minimal if you do it yourself.
• Wiring/connector repair: If wiring is damaged but components are good, you may only need connector replacement or wiring harness repair. Parts typically $10–$50 for connectors and copper wiring.
• Tools required: basic hand tools, multimeter or scan tool, small socket set, possibly a torque wrench (per service manual) for reassembly.
  Estimated DIY cost: roughly $20–$150 for parts; saves labor.

B. Professional repair options

• CMP sensor replacement (labor): Parts $20–$100; Labor $60–$150 (1–2 hours typical, depending on access).
• Wiring harness/connector repair (labor + parts): Parts $10–$100; Labor $80–$200.
• Timing chain/tensioner/guide replacement (labor + parts): If timing components are required, parts typically $100–$400 (chain, tensioner, guides, seals) plus substantial labor. Labor often 4–8 hours depending on accessibility; total roughly $600–$2,000+.
• Software/ECU update (if GM releases a TSB or update addressing CMP behavior): Parts typically $0–$50 (software update), Labor $50–$150 depending on dealer vs. independent shop.
  Note: The guide instructs to base decisions on cost ranges from 2025 pricing in the US; actual prices will vary by region and shop.

C. Typical scenario cost outlines

• CMP sensor fault with clean wiring and no timing issue: $80–$250 (parts + labor at a shop).
• CMP sensor fault with wiring repair: $150–$400.
• Timing chain-related issue (if present): $1,000–$2,000+, depending on engine access and component replacement.

DIY vs PROFESSIONAL

• DIY suitability:
  • Replacing the CMP sensor and repairing connector/wiring are good DIY tasks for a capable DIYer with basic tools.
  • Use proper torque specs and ensure the sensor is seated correctly; disconnect the battery when working on electrical connectors if recommended by the manual.
• Professional suitability:
  • If timing chain/tensioner/valve timing is suspected, or if you have intermittent CMP readings with no obvious sensor fault, a professional with a timing tool, scope, and engine timing knowledge should perform timing checks and possible mechanical repair.
  • A professional will also be better at diagnosing PCM-related issues or software updates when sensor symptoms persist after hardware replacement.

PREVENTION

• Regular maintenance:
  • Follow the Cruze’s service intervals for oil changes and replace oil filters with high-quality oil to minimize sensor contamination and engine sludge that can affect sensors.
  • Keep engine oil clean and within target levels, as oil contaminants can affect sensors and timing components.
• Protect electrical connections:
  • Inspect CMP electrical harnesses and connectors during routine maintenance for signs of wear, corrosion, or oil buildup.
  • Use dielectric grease on connector seals (if recommended by GM service guidelines) to resist moisture intrusion.
• Avoid moisture and contamination:
  • If you operate in wet or dusty environments, ensure engine bay seals and gaskets are intact to prevent water or debris intrusion into sensor connectors.
• Timely addressing of engine issues:
  • If you notice drivability issues (misfires, rough idle, stalling) or an MIL related to CMP, diagnose early to avoid potential timing-related damage.
• Software keepsake:
  • Check for and install any GM-released ECU updates impacting sensor performance if advised by a service bulletin or dealer.

Important data note

• As per the provided data, there are no NHTSA complaints or recalls listed for P0336 on the 2016–2019 Cruze. No recalls found in NHTSA database. Data limitations apply; actual vehicle behavior can differ, and individual cases may present with unique contributing factors.