P0335 Code: Chevrolet Silverado (2019-2024) - Causes, Symptoms & Fixes

DATA NOTE
According to the provided dataset, there are no NHTSA complaints or recalls listed for P0335 on 2019–2024 Chevrolet Silverado. No recalls found in NHTSA database. The diagnostic guidance below uses standard automotive knowledge and common industry practices, but actual vehicle behavior can vary. Data limitations: no official complaint counts or recalls are shown for this exact combination in the supplied data.

CODE MEANING AND SEVERITY

• Code: P0335
• Description: Crankshaft Position Sensor “A” Circuit Malfunction (GM/OBD-II generic). The crankshaft position sensor (CKP) provides the PCM with the crank’s rotational position signal, which is essential for ignition timing and fuel injection.
• Severity and impact: High. The vehicle may crank without starting, stall unexpectedly, or run with reduced power. In many cases, the MIL (Check Engine Light) is illuminated. Driving with an active P0335 can risk a no-start condition or sudden stalling, so mechanical diagnosis should not be delayed.

COMMON CAUSES ON CHEVROLET SILVERADO (2019–2024)

• Faulty crankshaft position sensor (the most common cause).
• Damaged, corroded, or loose CKP wiring harness or connector (especially harnesses routed near the belts, exhaust, or sharp edges; chafed insulation is common).
• Poor grounding or wiring power to the CKP circuit (battery/alternator issues can amplify symptoms).
• Damaged or misaligned reluctor ring (tone wheel) or issues with the crankshaft pulley area.
• PCM/ECM fault or parasitic electrical issues causing abnormal CKP signal processing.
• Moisture intrusion or corrosion in the CKP connector.
• Mechanical timing issue (less common for P0335 specifically but possible if timing-related components are defective or mis-installed).
• Engine swap or aftermarket modifications that affect sensor placement or wiring routing.
  Note: The Silverado’s 2019–2024 lineup includes various engines (eg, 2.7L turbo, 3.0L Duramax, 5.3L V8, 6.2L V8). CKP sensor design/location can vary by engine; inspection should account for engine-specific access.

SYMPTOMS

• Engine crank but fail to start, or extended crank time before starting.
• Stalling or hiccupping at idle or during cruising.
• Erratic or dead tachometer readings.
• MIL illuminated with a P0335 code; possibly in combination with other CKP-related codes.
• In some cases, intermittent no-starts or sporadic loss of power while driving.

DIAGNOSTIC STEPS

Note: Work safely; disconnect the battery before disconnecting electrical connectors if you’re doing disassembly. Use a capable scan tool and, if available, an oscilloscope to view the CKP waveform.

A. Verify and contextualize

• Confirm P0335 with a scan tool and note any related codes (P0336–P0339 or P0330–P0334). Check freeze-frame data (RPM, ignition status, battery voltage).
• Check battery voltage and charging system. CKP readings can be unreliable if voltage is low or unstable.

B. Visual inspection

• Inspect CKP sensor and its connector for signs of damage, corrosion, or moisture.
• Inspect the wiring harness for cuts, pinched sections, or heat/abrasion exposure near belts, exhaust, or moving components.
• Check the ground strap and PCM ground connections for looseness or corrosion.
• Inspect the reluctor ring/tone wheel and crankshaft pulleys for damage or misalignment (if accessible).
• If the engine was recently serviced, verify that sensor brackets and mounting hardware are correct and sensor is properly seated.

C. Electrical checks (CKP circuit)

• With the ignition off, unplug the CKP connector and inspect the pins for corrosion; reseat or replace if needed.
• Perform a continuity/voltage check:
  • Check the CKP signal circuit from the CKP sensor to the PCM input for continuity (no opens).
  • Check for any shorts to ground or to battery voltage on the signal line.
  • Check the reference voltage to the CKP sensor (often a 5V or 8V reference depending on design; refer to the service manual for the exact spec).
• Compare sensor resistance (if the manual provides a spec) versus the known-good range for the particular engine. Note that resistance specs vary by sensor type and engine; use the GM service information for exact values.

D. Signal testing (preferred method)

• Use a digital oscilloscope to view the CKP waveform while cranking. You should see a clean, repeating waveform synchronized with engine RPM. If the waveform is missing, irregular, or erratic, suspect a CKP sensor or wiring issue.
• If you don’t have an oscilloscope, use a live data view from a capable scan tool to observe the CKP RPM signal relative to actual engine RPM. A missing or non-correlating signal indicates a sensor or wiring problem.

E. Mechanical checks (when indicated)

• If electrical checks point toward a sensor issue but symptoms persist, inspect timing components if accessible (tone ring integrity, timing cover area). A damaged tone ring or misalignment can cause incorrect CKP readings.
• In rare cases, a timing issue or a crankshaft damper/seal problem can mimic CKP failures. If you suspect timing-related concerns, further mechanical inspection is warranted.

F. Replacement strategy

• If CKP sensor shows obvious damage, and wiring is intact, replace the CKP sensor with OEM or high-quality equivalent.
• If harness/connectors show significant damage, repair or replace the wiring harness segment and the connector as needed.
• After any replacement, clear DTCs, perform a road test, and re-check for new DTCs or lingering CKP faults.

G. When to escalate

• If a new CKP sensor does not resolve P0335 and no wiring faults are found, consider PCM-related troubleshooting or service bulletin guidance (note: the provided data indicates no recalls; no specific TSBs are cited in this dataset). Consult GM service information for CKP circuit test procedures and any vehicle-specific nuances.
• If a timing-related fault is suspected, seek advanced diagnostic assistance.

RELATED CODES

• CKP family (crankshaft position sensor): P0330–P0334 (different CKP circuit variants), P0336–P0339 (CKP sensor A/B circuit range/low/intermittent). These codes are commonly checked together, since they all involve crankshaft position sensing.
• Misfire and related engine codes may appear if ignition timing or fuel delivery is affected by CKP errors (for example, P0300, P0301–P0308).
• P0335 may appear alone or with one of the related CKP codes depending on the vehicle’s fault state.

REPAIR OPTIONS AND COSTS (2025 PRICES)

Note: Prices vary by engine, location, and labor rate. The following are typical ranges for 2025 and are intended as ballpark figures.

A. Crankshaft Position Sensor replacement

• Parts: GM CKP sensor typically $25–$100 (OEM or aftermarket). Silverado engines (2.7L, 3.0L Duramax, 5.3L, 6.2L) use CKP sensors with engine-specific wiring, so specify the correct part.
• Labor: 0.5–1.5 hours depending on engine and access (front-of-engine sensors are easier; some are behind pulleys or accessories, increasing time).
• Estimated total: $100–$350 (parts + labor). In some cases with tight access or additional wiring repair, costs can rise modestly.

B. Wiring harness/connector repair

• Parts: Connectors, small harness sections, weatherpack/GM-style connectors; usually $20–$150 depending on damage.
• Labor: 0.5–2.0 hours.
• Estimated total: $120–$500.

C. PCM/ECM concerns

• If PCM input is suspected after successful CKP replacement and issue persists, PCM replacement is a larger job.
• Parts: PCM price varies widely, typically $400–$1500 (depending on model and whether remanufactured).
• Labor: 2–4+ hours due to programmable immobilizer and software considerations.
• Estimated total: $800–$2500+ (including programming and calibration).

D. Timing/reluctor-related issues

• If a damaged reluctor ring or timing-related component is found, cost varies widely based on access and engine. Parts for timing components can be several hundred dollars, with labor in the 2–6 hour range.
• Note: If the problem is purely CKP sensor or wiring, these costs are not typical.

E. DIY cost considerations

• For a typical CKP replacement with simple access (no major disassembly), DIY parts cost might be $30–$100 plus basic tools. Saving on labor can be substantial but requires comfort with electrical diagnostics and reassembly integrity.

F. Important cautions

• Do not drive aggressively with an active P0335. Depending on the symptoms, transmission of false timing data can cause rough operation, misfires, or stalling.
• Ensure you correctly identify the engine variant to order the proper CKP sensor (fuel vs. diesel variants have different sensor types and circuits).

DIY VS PROFESSIONAL

• DIY pros: If you’re comfortable with automotive electrical systems, an OBD-II scan tool, basic multimeter, and careful test-wiring can be done at home. For engines with easy access to the CKP sensor, replacement is straightforward.
• DIY cons: Access may be difficult on certain Silverado engines (some CKP sensors are behind pulleys, belts, or accessory components). Incorrect wiring or sensor installation can cause further issues or PCM errors.
• Professional pros: A technician can use an oscilloscope to validate CKP waveform, perform amplifier/ground/voltage checks, and correctly verify wiring integrity. They can also reprogram or calibrate the PCM if needed, and diagnose complex mechanical causes (tone ring damage, timing issues).

PREVENTION

• Regularly inspect CKP sensor wiring for abrasion, heat exposure, and moisture intrusion; secure harness away from belts and hot exhaust components.
• Keep battery and charging system healthy; voltage dips can create or mask CKP faults.
• Use OEM or high-quality CKP sensors and connectors to ensure compatibility and longevity.
• When rerouting wiring after service, use proper loom/clips to prevent chafing and contamination.
• If doing major engine work, double-check sensor alignment and seal integrity to prevent water ingress or misalignment.
• Periodically scan for DTCs to catch intermittent CKP issues early before a stall or no-start condition.

DATA LIMITATIONS

• The provided dataset shows no NHTSA complaints or recalls for P0335 on 2019–2024 Silverado and explicitly states “No recalls found in NHTSA database.” Use the diagnostic guidance here as a general guide—model-year and engine-specific quirks may alter the exact procedure or common causes.
• No specific GM TSBs or recall items were cited in the provided data. For model-specific service information, consult GM service manuals or GM's official technical resources.