P0345 Code: Chevrolet Cruze (2016-2019) - Causes, Symptoms & Fixes

No recalls found in NHTSA database

Overview: This guide provides a comprehensive diagnostic approach to P0345 on 2016–2019 Chevrolet Cruze. The data you provided shows no NHTSA owner complaints or recalls for this exact model/year/issue pair. The diagnostic steps below combine standard OBD-II/CAM sensor knowledge with Cruze-specific considerations. If you have a different Cruze engine variant (e.g., a different displacement), the exact sensor labeling may vary slightly, but the general diagnostic flow remains applicable.

CODE MEANING AND SEVERITY

• What P0345 means: P0345 is the Camshaft Position Sensor A Circuit Malfunction. The engine control module (ECM/PCM) monitors the camshaft position sensor signal to determine the cam timing relative to crank position and uses that data to time fuel injection and ignition. When the PCM detects an abnormal, intermittent, or out-of-range signal from the Camshaft Position Sensor A circuit, it sets P0345.
• Bank/A terminology: On 4-cylinder Cruze engines, this is typically the primary camshaft position sensor circuit used by the ECU. Some GM documentation sometimes labels sensor circuits with Bank 1/Bank 2 terminology for V-engines; for Cruze’s inline engine, treat P0345 as the primary cam sensor circuit issue.
• Severity and symptoms you might notice:
  • MIL (Check Engine Light) on
  • Difficulty starting or no-start
  • Rough idle or stalling
  • Poor acceleration or misfires
  • Reduced fuel economy
  • Intermittent drivability issues (engine runs fine sometimes, then harshly stalls or fails to start)
• Data limitations: Based on the provided data, there are no NHTSA complaints or recalls for this issue on 2016–2019 Cruze models. This does not mean the problem never occurs; it means it hasn’t appeared in the dataset you supplied. The guide below focuses on typical failure modes and diagnostic steps applicable to this code.

COMMON CAUSES ON CHEVROLET CRUZE

• Faulty Camshaft Position Sensor (A) itself
• Damaged, corroded, or loose wiring harness to the CPS A
• Cracked or damaged sensor connector, or poor/oxidized grounding
• Oil contamination or oil leaks around the sensor or its connector
• Vacuum or oil leaks that affect the sensor’s electrical environment (less common, but possible)
• PCM/ECM fault (less common; usually a symptom once wiring and sensor are ruled out)
• Timing-related issues (rare for this code in a healthy Cruze; if the timing chain/belt tension or synchronization is off, other codes like P0016/P0017 may also appear, but it’s still worth verifying timing in diagnostic steps if symptoms persist)

SYMPTOMS TO WATCH FOR

• Check Engine Light illuminated with P0345 stored
• Hard starting or no-start condition
• Rough idle or stalling, especially at idle or low rpm
• Hesitation or surges during acceleration
• Degraded fuel economy
• Intermittent drivability problems (engine may run fine for a while, then exhibit misfire/roughness)

DIAGNOSTIC STEPS (step-by-step, practical flow)

Note: Always follow safety procedures. If you’re not comfortable with electronic diagnostics, consult a qualified technician.

A. Confirm and contextualize

• Use an OBD-II scanner to confirm P0345 and check for any related pending codes (P0340–P0344, P0016/P0017, P0335, etc.).
• Review freeze-frame data for conditions (RPM, load, temperature) at the time of the fault.

B. Visual and mechanical inspection

• Inspect the Camshaft Position Sensor A and its wiring harness/connector for obvious damage, corrosion, oil intrusion, or loose connections.
• Inspect the sensor’s mounting bolt(s); ensure it is properly torqued to spec.
• Check for oil leaks around the valve cover area that could affect the sensor or connector.
• Inspect the grounds and the PCM/engine ground strap for cleanliness and integrity.

C. Electrical tests (requires a multimeter or oscilloscope)

• Power and ground check:
  • A typical CPS uses a 5V reference from the PCM. With the ignition ON (engine OFF), back-probe the sensor connector and verify:
    • 5V reference on the power pin
    • A solid ground on the ground pin
• Sensor signal test:
  • With the engine cranking (or the engine running if safe to do so), measure the signal wire at the CPS connector.
  • If you have an oscilloscope, you should see a pulsed waveform as the engine turns and the camshaft passes the sensor. If the signal is flat-lined (no changes) or stuck at a constant high/low, the sensor or wiring is suspect.
• Resistance/continuity checks:
  • Check continuity of the sensor signal and ground wires from the CPS connector to the PCM harness side. Look for any internal damage or high resistance.
• If available, perform a swap-test:
  • If you have access to a known-good CPS (from a similar Cruze engine), swapping in a tested sensor can quickly confirm whether the sensor is at fault. If replacing the CPS fixes the code and symptoms, the wiring was likely okay.

D. Inspect and assess the harness and connector

• Disconnect the CPS connector; inspect the terminals for bending, corrosion, or damage.
• Clean the connector gently if contamination is present; apply a small amount of dielectric grease to preserve contacts.
• Reconnect and reseat the connector fully; ensure harness routing isn’t rubbing on sharp edges or hot surfaces.

E. Consider timing-related checks if symptoms persist

• If there is suspicion of timing correlation issues (rare for P0345 but possible if the cam timing is off), verify camshaft timing with the service manual’s procedure (timing marks, alignment tools, etc.). If timing is off, you may see P0016/P0017 in addition to or instead of P0345.

F. Final steps

• Clear codes and perform a road test or drive cycle to confirm if P0345 returns.
• If the code does not return after a sensor/wiring repair and the symptoms are resolved, you may have resolved the issue. If it returns, re-check all connections and consider PCM fault as a last resort.

RELATED CODES

• P0340 Camshaft Position Sensor Circuit Malfunction (general)
• P0341 Camshaft Position Sensor A Circuit Range/Performance (Bank 1) or similar (sensor A)
• P0342 Camshaft Position Sensor A Circuit Low Input
• P0343 Camshaft Position Sensor A Circuit High Input
• P0344 Camshaft Position Sensor A Circuit Intermittent
• P0335 Crankshaft Position Sensor "A" Circuit Malfunction
• P0016 Crankshaft Position– Camshaft Position Correlation (Bank 1 Sensor A)
  Notes:
• In Cruze/GM gasoline engines, P0345 is associated with the cam sensor A circuit; if you see P0340–P0344 variants, they indicate related cam sensor circuit issues but with different signal conditions or banks. P0016/P0017 relate to cranks/cam timing correlation and often appear when timing is a factor.

REPAIR OPTIONS AND COSTS (2025 PRICES)

Important: Prices vary by region, shop, and whether you use OEM or aftermarket parts. The ranges below are rough current-market ballparks for typical US repair shops.

• Camshaft Position Sensor A replacement (sensor only)

  • Parts: roughly $15–$60
  • Labor: about 0.5–1.0 hour
  • Estimated total: $80–$180 (dealer price could be higher)

• Sensor + harness/connector repair or cleaning

  • If wiring or connector is damaged, the repair may involve cleaning, re-terminating connectors, or replacing a short section of harness
  • Parts: $5–$60 (plus any connector or sleeve if replaced)
  • Labor: 0.5–1.0 hour
  • Estimated total: $60–$220

• Full sensor replacement with timing-related checks (rarely required for P0345)

  • If the issue is discovered to involve timing components (rare for this code), costs could be significantly higher
  • Parts: sensor + possible timing-related components
  • Labor: 1.0–2.0+ hours
  • Estimated total: $200–$600+ (depending on whether timing components require replacement)

• PCM replacement (rare)

  • Parts: $400–$1,200 (plus labor)
  • This is typically a last-resort scenario after confirming the sensor and wiring are sound and no other causes are found.

DIY vs PROFESSIONAL

• DIY feasibility:
  • Replacing the Camshaft Position Sensor A is a common DIY task on many engines and can be straightforward if you can locate the sensor (usually on the top or side of the engine near the valve cover). Some Cruze models require removing components or accessing from tight spaces; plan for an hour or two, plus tooling.
  • Tools you’ll typically need: metric sockets (likely 8–10 mm), screwdriver or pry tool, multimeter or oscilloscope (for signal checks) if you have access, dielectric grease, and a torque wrench if applicable.
  • Skills to have: basic electrical testing, ability to safely disconnect/reconnect electrical connectors, and an understanding of engine wiring harness routing.
• When to skip DIY:
  • If you’re uncomfortable diagnosing electrical circuits, or if you’ve already confirmed the sensor isn’t the issue and your wiring junctions look suspect.
  • If you lack the tools to measure sensor signals or don’t have access to a known-good sensor for a swap test.
• Professional approach:
  • A shop will typically confirm with a scan tool, perform a live signal check, test 5V reference and ground, check the wiring with continuity tests, and may perform a swap with a known-good sensor. They can also check for PCM-related faults and perform more extensive timing checks if indicated.

PREVENTION

• Keep oil leaks under control. Oil contamination around the sensor is a common failure mode; fix any valve cover leaks promptly.
• Regular maintenance: change engine oil and filter at manufacturer-recommended intervals; use the correct viscosity to avoid excessive engine wear that can affect sensor signals.
• Inspect wiring harnesses periodically, especially in high-heat areas around the valve cover and near moving components. Look for cracked insulation, chafing, or brittle connectors.
• Protect electrical connectors: use dielectric grease on connector pins during installation to resist corrosion and moisture.
• Address sensor issues early: if you notice intermittent hard starts, rough idle, or MIL illumination that coincides with rough engine operation, diagnose promptly rather than waiting for repeated fault codes.

Data limitations and guidance

• The provided dataset shows no owner complaints or recalls for this exact issue on 2016–2019 Cruze. This means there isn’t publicly reported NHTSA data to draw prevalence conclusions from in this case. The diagnostic guide above relies on standard automotive diagnostics for camshaft position sensor circuits and is tuned for Cruze engines. If you have a different engine variant or modifications, the exact sensor labeling or procedure may differ slightly.
• No recalls found in NHTSA database
• If you’re troubleshooting in the real world, always cross-check with the vehicle’s service manual for Cruze-specific torque specs, connector pinouts, and wiring diagrams.