P0336 Code: Jeep Cherokee (2019-2023) - Causes, Symptoms & Fixes

Comprehensive diagnostic guide for P0336 on 2019-2023 Jeep Cherokee

Data note and limitations

• NHTSA data provided:
  • Owner complaints: No NHTSA complaints found for this make/model/year/issue combination.
  • Official recalls: No recalls found in NHTSA database.
  • Therefore recall status: No recalls found in NHTSA database.
• Because the data set shows no complaints and no recalls, this guide relies on general automotive knowledge for P0336 diagnostics as it applies to modern Jeep Cherokee engines (2019–2023). Actual vehicle behavior can vary by engine option (e.g., 2.0L turbo, 2.4L, 3.2L V6) and production changes. Use this as a diagnostic framework, not a guaranteed fix.

CODE MEANING AND SEVERITY

• Code definition: P0336 – Camshaft Position Sensor “A” Circuit Range/Performance. This means the engine control module (ECM/PCM) detected an out-of-range or unstable signal from the primary camshaft position sensor (often referred to as Camshaft Position Sensor A). The sensor’s signal is used to time fuel injection and ignition.
• Severity and impact:
  • Generally considered a mid-level diagnostic trouble code.
  • Possible consequences: rough idle, misfires, reduced power, poor acceleration, stalling or hard starting, and a degraded drive experience. In some cases, the vehicle may enter a limp mode to protect the engine.
  • If multiple related sensors or timing components are suspect, drivability can become more pronounced.

COMMON CAUSES ON JEEP CHEROKEE

• Faulty camshaft position sensor (CMP sensor) itself
• Damaged, frayed, or corroded wiring to the CMP sensor or a degraded connector
• Poor or loose electrical connections (including ground path to the PCM)
• Timing-related issues (timing chain/belt, timing chain tensioner, or variable valve timing solenoids) causing incorrect cam timing or signal interpretation
• PCM/ECM fault or a software issue affecting the CMP signal interpretation
• Electrical noise or voltage supply problems (e.g., weak battery/alternator, poor grounding)
• Sensor misalignment or mechanical damage to the cam dowel/reluctor area (less common, but possible with engine work or debris)
• Oil or contamination affecting sensor contact surfaces (less common but possible if oil leaks reach the sensor)
• Intermittent sensor signal (noise, coupling, or connector movement) leading to sporadic fault codes

SYMPTOMS

• Check Engine Light (MIL) illuminated
• Rough idle or fluctuating idle speed
• Misfires or occasional stumbling during acceleration
• Reduced engine power or hesitation under load
• Hard starting or extended crank times
• Decreased fuel economy
• In some cases, no obvious symptoms besides the MIL and a stored P0336

DIAGNOSTIC STEPS

Note: Always begin with a reliable scan tool and reference the vehicle’s service information for engine type and CMP sensor location specifics.

Step 1 — Verify the code and collect data

• Use a modern scan tool to confirm P0336 and check for any related codes (e.g., P0335 Crankshaft Position Sensor, P0340 Cam Position Sensor, or P0341 variants). Record freeze-frame data (engine RPM, engine load, temperature, etc.).
• Check live sensor data for the CMP sensor signal waveform if your tool supports it.

Step 2 — Inspect basic electrical health

• Visually inspect CMP sensor and wiring harness for obvious damage, oil seepage, abrasion, or moisture.
• Inspect the CMP sensor connector: confirm it is fully seated, clean, and free of corrosion. Re-seat if necessary and apply dielectric grease if appropriate.
• Check for secure battery voltage and a healthy charging system. A weak battery/low voltage can cause sensor misreadings.

Step 3 —Electrical testing (if you have the tools)

• With ignition ON (engine OFF), verify CMP sensor supply voltage and ground
  • Supply voltage (reference) to the CMP sensor (often around 5V for many CMP sensors). Confirm it is within spec.
  • Sensor ground should be solid with low resistance to chassis/PCM ground.
• With the engine cranking (or running where appropriate under load), check the CMP signal wire for:
  • Clean, consistent waveform (no missing or erratic pulses)
  • Reasonable amplitude and frequency that matches engine speed
• Compare CMP signal to crankshaft position sensor signal (P0335) if your tool provides both; proper engine timing requires the two to correlate within spec.

Step 4 — Inspect timing and mechanical integrity

• If CMP wiring and sensor readings appear normal but the code persists, there could be a timing issue:
  • Inspect timing chain/belt (and tensioners if applicable) for wear, slack, or misalignment. Note: many modern Cherokees use chain-driven timing; a stretched chain or failed tensioner can cause cam/crank timing misalignment and P0336-like symptoms.
  • Inspect camshaft pulley/reluctor area for damage or debris.
    Warning: If you suspect timing issues, do not force engine operation. Incorrect timing can cause severe engine damage. This is a point where many technicians will perform a mechanical timing check or refer to timing chain replacement if indicated.

Step 5 — Component replacement/testing decisions

• If CMP sensor is visibly damaged or test results indicate a faulty sensor or inconsistent signal, replace the CMP sensor with the correct OEM/quality aftermarket unit.
• If wiring harness or connector is damaged, repair or replace wiring and repair the connector as needed.
• If the sensor and wiring test good but code reappears, consider PCM/ECM considerations or software updates (via dealer or qualified shop). No official TSB/recall data is cited in the provided data, so treat this as a software update possibility rather than a guaranteed fix.
• If timing components are suspect (chain/slack, tensioner), plan for a timing service if diagnostics support this.

Step 6 — Post-repair validation

• Clear the codes and perform a comprehensive drive cycle (including idle, light throttle, moderate acceleration, and steady state driving) to verify no reoccurrence of P0336.
• Re-scan to confirm P0336 does not return. If it does, re-evaluate CMP wiring, sensor, and timing, or consult a professional.

RELATED CODES

• P0335 – Crankshaft Position Sensor “A” Circuit
• P0340 – Camshaft Position Sensor “A” Circuit (Bank/Engine timing)
• P0341 – Camshaft Position Sensor “A” Circuit Range/Performance (may appear with intermittent symptoms)
• P0336 is often evaluated alongside these when cam/crank timing or CMP signal integrity is in question. Investigate both CMP and CKP circuits if symptoms persist.

REPAIR OPTIONS AND COSTS (2025 prices)

Note: Prices vary by region, shop, engine variant, and whether OEM or aftermarket parts are used. The figures below are typical ranges for the U.S. market as of 2025.

• Camshaft Position Sensor (CMP) replacement
  • Parts: $20–$120
  • Labor: ~0.5–1.5 hours
  • Total estimate: $120–$250
• Wiring harness/connector repair or replacement
  • Parts: $10–$100 (connector/harness material)
  • Labor: 0.5–2.0 hours (depends on access)
  • Total estimate: $100–$400
• Timing chain/belt and related timing components (if timing is suspected)
  • Parts: $150–$600 (timing chain kit, tensioners, guides)
  • Labor: 3–6 hours or more (engine access required)
  • Total estimate: $900–$2,500
• PCM/ECM diagnosis or software update
  • Parts: typically included in service; software update may be a dealer diagnostic charge
  • Labor: 0.5–1.5 hours
  • Total estimate: $100–$350 (may vary; some updates may be covered under warranty or dealer program)
• Other miscellaneous charges (fluids, seals, shop supplies)
  • Typical range: $20–$100

DIY vs PROFESSIONAL

• DIY considerations:
  • Replacing a CMP sensor is a feasible DIY task for a moderately experienced mechanic with basic hand tools. You can expect to spend 1–2 hours, plus parts.
  • Safely diagnosing wiring issues and testing CMP signals may require a multimeter and, ideally, an oscilloscope or a capable scan tool to view waveforms.
  • If timing components are involved or you suspect a timing issue, DIY work becomes more complex and high risk. Incorrect timing can cause severe engine damage.
• Professional considerations:
  • If you suspect timing chain wear, misalignment, or you have intermittent or multiple fault codes, a professional shop is recommended.
  • A dealer or qualified tech can access OEM service information, perform precise timing alignment checks, and perform software/ECU updates if needed.

PREVENTION

• Regular maintenance:
  • Keep up with scheduled oil changes and use the correct oil grade for your engine. Clean oil helps keep sensors and timing components in good condition.
  • Inspect and replace breached wiring insulation or degraded connectors promptly to prevent intermittent sensor faults.
• Electrical health:
  • Maintain a healthy battery and charging system. A weak voltage supply can cause sensor signals to read inaccurately.
  • Ensure clean, dry engine bay connections; avoid exposure to water ingress that can corrode sensor connectors.
• Timely inspection of timing components:
  • If your vehicle has high mileage or shows signs of timing concerns (rattles, poor idle, misfires), have the timing chain/belt and tensioners inspected as part of routine maintenance, especially if a cam/crank sensor issue arises.
• Software updates:
  • If a software update is available from the dealer that addresses sensor interpretation or timing control, consider having it applied as part of routine maintenance or when diagnosing related issues (discuss with your technician).

Final notes

• This guide follows the provided data, which shows no owner complaints and no recalls for P0336 on 2019–2023 Jeep Cherokee in the dataset. No recalls found in NHTSA database.
• P0336 is primarily a signal integrity or timing issue related to the camshaft position sensor. Start with the sensor and wiring, then proceed to timing concerns if the fault persists.
• If you’re not comfortable performing electrical tests or timing inspections, seek a qualified technician. Accurate diagnosis often requires wiring checks, signal waveform observation, and sometimes timing component inspection.