P0336 Code: Chevrolet Silverado (2019-2024) - Causes, Symptoms & Fixes

Diagnosis guide for OBD-II code P0336 on 2019-2024 Chevrolet Silverado

Important data note (data limitations)

• REAL NHTSA DATA FOR Chevrolet Silverado (2019-2024): OWNER COMPLAINTS: No NHTSA complaints found for this make/model/year/issue combination. OFFICIAL RECALLS: No recalls found in NHTSA database.
• As a result, there are no documented Silverado-specific recalls or complaint stories in the provided data for P0336. This guide uses general automotive knowledge for the Crankshaft Position Sensor (CPS) and its electrical/mechanical failure modes, and provides a practical diagnostic workflow tailored to the Silverado platform. If you have access to additional data (service bulletins, TSBs, dealer notices), those could refine the steps, but they are not included here per the data you supplied.

CODE MEANING AND SEVERITY

• Code definition: P0336 = Crankshaft Position Sensor Range/Performance (Bank 1 or A) circuit. The PCM has detected that the crankshaft position sensor (CPS) signal is outside expected range or is not performing consistently, across RPM ranges, or intermittently.
• Severity and impact: Moderate to severe. A true P0336 can cause intermittent starting problems, rough idle, misfires, poor acceleration, reduced power, or stalling. In some cases the vehicle may run enough to drive to a repair facility, but continued operation risks running with limited power or being stranded.
• Important distinctions: P0336 indicates a signal-range or performance issue rather than a straight short to ground or open circuit (more aligned with signal integrity problems). In some cases, the PCM may store P0336 after encountering sporadic CPS waveform anomalies even if the sensor seems physically okay.

COMMON CAUSES ON CHEVROLET SILVERADO

• Faulty crankshaft position sensor (CPS) itself (sensor worn, damaged, or exposed to oil/heat).
• Wiring harness problems to the CPS (damaged insulation, pin corrosion, broken/loose connector, chafed wires, poor ground).
• Oil or coolant leakage contaminating the CPS or its connector (oil-soaked sensor or ring).
• Damaged reluctor ring or timing components (crankshaft reluctor ring damaged or misaligned; timing chain/belt issues affecting the sensor’s reference).
• Electrical grounding or power supply issues (low voltage, poor PCM supply/reference, or ground destabilization affecting signal quality).
• Aftermarket accessories, wiring harness modifications, or interference near the CPS.
• PCM fault or software anomaly (less common, but possible if the PCM misreads the waveform or reference signals).
• Mechanical issues causing inconsistent crank signal (e.g., severe engine movement, worn crankshaft journal area).
  Note: Silverado engines vary by year/option (3.0/6.2/5.3/4.3 etc.). The CPS location and wiring harness routing can differ; always consult your specific engine’s service information if available.

SYMPTOMS TO EXPECT

• Check Engine Light (MIL) illuminated with P0336 stored in the ECU.
• Rough idle or engine misfire symptoms.
• Hard starting or extended cranking to start.
• Engine stalling or sudden loss of power while driving.
• Intermittent loss of power or poor acceleration.
• Reduced engine performance or hesitation at acceleration.
• In some cases, no obvious symptoms other than the MIL.

DIAGNOSTIC STEPS (practical workflow)

Preparation:

• Use a reliable OBD-II scanner with live data and the ability to view CPS waveform if possible (or use a lab scope).
• Have a mechanic’s stethoscope, multimeter (DMM), and possibly an oscilloscope available.
• Safety: work with the engine OFF and cooled when disconnecting sensors. If you’re road testing, do so safely.

Step-by-step:

Confirm and document

• Retrieve P0336 with your scanner; note any freeze-frame data (engine RPM, vehicle speed, load, coolant temperature, etc.) for reference.
• Check for any related codes (P0335, P0339, etc.) that can indicate CPS circuit issues or other crank/cam sensor problems.

Visual inspection

• Inspect CPS connector and wiring to the CPS for damage, corrosion, oil contamination, or loose pins.
• Inspect the CPS sensor housing for cracks or signs of heat/contamination.
• Look for oil leaks or coolant leaks around the sensor area; clean and reseal if needed.
• Inspect the reluctor ring or crankshaft gear area for damage, misalignment, or foreign debris.

Test the electrical circuit

• With the ignition OFF, inspect the CPS wiring insulation and conduct continuity checks from the CPS connector to the PCM harness connector. Look for damaged insulation, high resistance, or open circuits.
• Check for a solid ground. A poor ground can corrupt CPS signal, so verify the CPS ground path to chassis/PCM.
• Verify the reference voltage/signal wiring. If you have a service manual, locate the expected reference (often a 5V reference or a dedicated CPS circuit path) and verify voltage with ignition ON (engine not running) and with engine running as permitted by your tool. Look for abnormally low or fluctuating voltage.
• Resistance/voltage checks alone are not always definitive for CPS with a variable-reluctance sensor; use an oscilloscope to view the CPS waveform if available.

Signal waveform and data validation

• If you have access to an oscilloscope or a scope function in a scan tool, observe the CPS signal as the engine RPM increases.
• Expected characteristics: a clean, periodic waveform whose frequency correlates with crank speed. At idle and when revving, waveform should be stable without large irregularities or dropouts.
• Look for intermittent dropouts, irregular pulse widths, or a signal that vanishes at certain RPM ranges. Such behavior points toward wiring, connector, or sensor integrity issues rather than a PCM fault.

Mechanical/relative checks

• If electrical checks are inconclusive, consider mechanical causes:
  • Inspect the timing chain/belt tensioner and chain/sprockets if the engine design exposes the CPS to timing components (timing issues can affect the CPS signal range).
  • Inspect the crankshaft reluctor ring for damaged teeth or misalignment.
  • Consider oil contamination from a leak causing sensor failure; address leaks if found.

Sensor swap/bench test (where feasible)

• If you have a known-good CPS available (or a service loaner), swap the CPS to verify if the P0336 clears. If the vehicle runs normally after swapping, the CPS was the culprit.
• Replacing the CPS alone is a common fix; ensure you keep the sensor alignment and torque specification in range per GM service procedures.

Rule-out PCM or harness faults

• If the sensor and wiring test good, and the waveform looks correct, but the code persists, a PCM fault or a rare software issue could be the cause. This is less common but may require dealer-level diagnostics or re-flashing software.

Clear codes and road test

• After corrective work, clear the codes and perform a road test, paying attention to any reappearance of P0336 or related codes and to the symptom profile (startability, idle, power delivery).

Documentation

• Record all findings, including test results, photos of the wiring/sensor area, and the steps taken. If the code reappears, you’ll have a better foundation for follow-up steps or escalation.

RELATED CODES

• P0335 Crankshaft Position Sensor A Circuit Malfunction (general CPS circuit malfunction; commonly seen with CPS problems)
• P0339 Crankshaft Position Sensor A Circuit Intermittent (signal intermittent or spike-like issues)
• Other crank/cam sensor family codes may appear if the CPS issue overlaps with camshaft position sensing or timing components (examples include Camshaft Position Sensor codes such as P0340 in many engines; specifics vary by engine family). If P0336 is accompanied by cam/crank-related codes, broader timing or sensor issues should be considered.
  Note: The above related codes are provided for context. The exact code availability and naming may vary by GM model year and engine option.

REPAIR OPTIONS AND COSTS (2025 prices)

Prices vary by region, dealership vs independent shop, engine type, and whether OEM or aftermarket parts are used. The Silverado 2019-2024 lineup includes several engines; the CPS location and service procedure may differ (front timing area vs. side of the engine). The following are typical ranges to help you budget.

• Crankshaft Position Sensor (CPS) replacement

  • Parts: $20–$120 (OEM vs aftermarket; sensor price ranges vary by supplier and model)
  • Labor: 0.5–2.0 hours (depending on engine layout and whether related components must be removed)
  • Estimated total: roughly $100–$300

• Wiring harness or connector repair

  • Parts: $10–$100 (depends on whether you’re replacing a connector, harness segment, or applying a repair kit)
  • Labor: $1–2 hours if done in conjunction with sensor replacement or moderate harness work
  • Estimated total: $100–$400

• Oil leak repair or sensor contamination remediation

  • If contamination is the cause, repair costs depend on the leak (e.g., valve cover gasket, oil pan leak) and may range from $150 to $800 or more, plus CPS replacement if needed.

• Timing components or mechanical timing-related repairs

  • If a timing chain/belt, tensioner, or related component is implicated, costs increase significantly:
  • Parts: hundreds to over $1,000 depending on engine and scope
  • Labor: 4–12 hours (plus potential additional parts)
  • Estimated total: $1,000–$3,000+ (typical for major timing work)

• PCM replacement or reprogramming

  • Parts: several hundred dollars for a PCM (plus labor)
  • Labor: variable; often 1–3 hours for installation and software update
  • Estimated total: $500–$1,500+ depending on dealer vs independent shop

Notes on cost accuracy:

• These are broad estimates intended to guide budgeting. Actual prices depend on your exact Silverado engine (for example, 5.3L V8, 6.2L V8, turbo-diesel variants) and local labor rates. OEM vs aftermarket parts can swing price significantly.

DIY vs PROFESSIONAL

• Do-it-yourself (DIY)

  • Pros: Lower parts/labor cost; educational and satisfying if you’re comfortable with basic automotive electrical work.
  • Cons: CPS replacement on some Silverado engines requires specific access, potential timing component interaction, and careful handling to avoid sensor damage. Risk of misdiagnosis if you rely only on symptom-based testing.
  • If you’re comfortable with basic electrical diagnosis, wiring checks, and sensor replacement procedures, a CPS replacement can be a doable DIY job. Always disconnect the battery before unplugging sensors and follow proper torques and alignment guidance.

• Professional shop

  • Pros: Access to vehicle-specific service information (GM repair manuals), proper diagnostic flow with possible oscilloscope usage, official wiring diagrams, and tests (e.g., live waveform checks). Access to OEM parts and potential software updates if PCM re-flash is required.
  • Cons: Higher labor rates; potential for minor delays if additional testing is needed.

• Recommendation: Start with a careful inspection of wiring and sensor condition. If you’re not confident about diagnosing signal integrity or performing a reliable sensor swap, a professional diagnostic is advisable to avoid misdiagnosis and unnecessary parts replacement.

PREVENTION

• Routine maintenance and attention to oil leaks: keep engine oil clean and at proper level; address any oil leaks promptly to prevent CPS contamination.
• Wiring protection: inspect CPS connectors for corrosion or damage during routine service; use dielectric grease to reduce moisture intrusion in electrical connectors, and reseal if needed.
• Avoid water exposure and engine bay contamination in the CPS area; if you wash under the hood, ensure connectors are dry afterward.
• Regular timing component inspection (as per GM maintenance schedule): ensure timing chain/belt, tensioners, and guides are in good condition if your engine uses a timing chain design; severe wear can indirectly affect CPS signal reliability.
• Address misfire or rough-idle symptoms promptly; unresolved misfires can mask or complicate CPS-related diagnostics.
• Using OEM-grade sensors or trusted aftermarket parts; avoid low-quality sensors that may have inconsistent signal output.
• If you recently performed repair work near the CPS or crank area, re-check wiring and sensor seating to ensure no movement or poor contact introduced.

Bottom line

• P0336 on a 2019–2024 Chevrolet Silverado points to a crankshaft position sensor signal issue—sensor, wiring, or mechanical signal integrity problems are the usual culprits. The data provided shows no documented NHTSA recalls or complaints for this exact combination, so this guide emphasizes general CPS-related diagnostics and Silverado-specific considerations rather than a documented field issue. If symptoms persist after a CPS and wiring inspection/replacement, consider PCM evaluation or timing-related checks with a qualified technician.