P0571 Code: Jeep Cherokee (2019-2023) - Causes, Symptoms & Fixes

Diagnostic guide for OBD-II code P0571 on 2019-2023 Jeep Cherokee

Note on data sources

• According to the provided dataset, there are no owner complaints recorded for this make/model/year/issue combination.
• No recalls found in NHTSA database for this make/model/year.
• Data limitations: There are no complaint or recall entries to rely on for statistics specific to P0571 on the 2019–2023 Cherokee. The guidance below combines the code meaning with general automotive knowledge and typical repair considerations for this class of fault.

1. CODE MEANING AND SEVERITY

• What P0571 means: P0571 is a diagnostic trouble code indicating a malfunction in the cruise control input signal circuit. In practical terms, the vehicle is detecting a fault in the signal that tells the cruise control system (and the vehicle’s speed input to the cruise control module/PCM) what the actual vehicle speed is or how the cruise control should respond.
• Severity at a glance: The issue commonly affects cruise control capability (cruise control may fail to engage or disengage unexpectedly). It can also reflect a problem in the speed input path to the cruise control system, which may be tied to the vehicle speed sensor (VSS) or related wiring. This is typically not an immediate safety-critical failure of propulsion, but it can affect convenience, vehicle speed control, and can coincide with other speed-signal issues. If the speed signal is intermittent or unreliable, other systems that rely on a correct speed input may behave oddly (e.g., speedometer readings, transmission behavior). Overall, plan to diagnose and fix to restore reliable cruise control and speed input reliability.

2. COMMON CAUSES ON JEEP CHEROKEE

• Faulty or misadjusted brake pedal/brake light switch: The brake switch is commonly tied into the cruise control logic (disables cruise when the brake is pressed). A misadjusted or failing switch can trigger false signals or disrupt the input circuit.
• Faulty Vehicle Speed Sensor (VSS) or related wiring: A failing VSS, poor signal integrity, damaged wiring, or corroded connector can produce erratic or incorrect speed input to the cruise control module/PCM.
• Cruise control module or related wiring harness: Faulty cruise control module (or its wiring harness and connectors) can cause a disrupted input signal path.
• Electrical harness or connector corrosion/damage: Wiring harness damage or loose/dirty connectors in the cruise control input circuit, brake switch circuit, or VSS circuit can create intermittent faults.
• PCM/ECU software or calibration issues: In some cases, software glitches or the need for an update can manifest as input-circuit issues.
• Aftermarket electrical modifications or additions: Improper wiring, adapters, or non-OEM components can interfere with the cruise control input circuit.
• Grounding or power supply problems: Poor grounds or voltage supply issues to the cruise control circuit can create abnormal signal behavior.

3. SYMPTOMS

• Check Engine Light (CEL) / MIL illuminated with P0571 stored or pending.
• Cruise control will not engage, or disengages shortly after being turned on.
• Cruise control behavior is intermittent (engages sometimes, fails at others).
• Possible accompanying symptoms: erratic vehicle speed readings or a speedometer that is not consistent; in some cases, other speed-input related codes may appear (e.g., P0500 for Vehicle Speed Sensor issues).
• In a vehicle with data-logging, you may notice a discrepancy between actual speed and the speed reported by the cruise control system.

4. DIAGNOSTIC STEPS
   Preparation: You’ll need an OBD-II scan tool capable of reading live data, a digital multimeter (DMM), basic hand tools, and a test light. When working with airbag or other safety systems, follow standard safety procedures.

Step-by-step diagnostic approach

• Step 0: Verify the code and data
  • Use an OBD-II scanner to confirm P0571 is active and note any related codes (P0572, P0573, P0500, etc.).
  • Check freeze-frame data to see vehicle speed, engine RPM, timing of the fault, and whether the fault occurs at specific speeds or conditions.
• Step 1: Inspect brake pedal switch circuit
  • Locate the brake pedal switch and check for proper adjustment and operation (the switch should change state when the pedal is pressed and released).
  • With the brake pedal at rest, verify that the associated circuit is not falsely signaling a brake press.
  • Check brake lights for proper operation; a faulty brake switch often has visible symptoms in braking-light circuits.
  • If the switch is suspect, replace or adjust it, and clear codes to see if P0571 returns.
• Step 2: Inspect Vehicle Speed Sensor (VSS) and related wiring
  • Locate the VSS (often on the transmission housing or near the transmission tailshaft area depending on the exact Cherokee configuration).
  • Inspect the sensor, its mounting, and the wiring harness for signs of damage, chafing, corrosion, or loose connections.
  • Check the VSS connector for corrosion or bent pins.
  • Measure the VSS signal with a scan tool live-data readout while slowly moving the vehicle or during a controlled test drive. The speed data should smoothly increase with vehicle speed and should match the wheel speed (or GPS-based speed if you can compare it). If the signal is erratic, intermittent, or missing, the VSS or its wiring is the likely culprit.
  • If the VSS appears faulty, replace the sensor; if wiring issues are found, repair or replace the damaged harness and connectors.
• Step 3: Inspect the cruise control module and harness
  • Visually inspect the cruise control module, its mounting, and harness for signs of damage, moisture intrusion, or corrosion.
  • Check all connectors and grounds related to the cruise control circuit. Ensure legit power and ground presence at the module and that fuses relevant to cruise control are intact.
  • If you have access to a professional-grade scan tool, read live data for the cruise control input circuit and check for abnormally high or low signals that match the P0571 criteria.
• Step 4: Check for software/ECU updates
  • Confirm whether there are any available OEM software updates or calibrations for the Cherokee’s PCM/ECU that address cruise control input signal handling. If updates exist, apply them via the dealer or a capable shop.
• Step 5: Logical isolation
  • If available, temporarily disconnect or disable auxiliary components tied into the cruise control input path to determine if the fault is isolated to a particular sub-system (e.g., disconnect VSS to see if the fault still occurs, or test with the brake switch unplugged under safe conditions; only perform these steps if you are qualified and follow safety guidelines).
• Step 6: Road test and verify
  • After addressing the suspected issue (brake switch, VSS, or module wiring), perform a controlled test drive to confirm whether P0571 reappears and whether cruise control operates normally.
• Step 7: If the fault persists
  • If all visual and basic electrical checks pass yet P0571 remains, this may indicate a deeper ECU/PCM fault or a need for professional reprogramming or replacement of the cruise control module. Re-flash or reprogramming should be performed by a dealer or qualified shop with the correct software and calibration files.

5. RELATED CODES

• P0572: Cruise Control Input Circuit Low
• P0573: Cruise Control Input Circuit High
• P0500: Vehicle Speed Sensor Malfunction (commonly associated with speed input issues that can appear alongside cruise control faults)
  Note: P0572 and P0573 indicate input-signal level problems, which can help pinpoint whether the issue is a low or high signal condition in the cruise control input path. P0500 signals a general vehicle speed input problem that can be related to VSS or wiring for the same system.

6. REPAIR OPTIONS AND COSTS (2025 prices)
   Prices are ballpark ranges for typical Cherokee models in the U.S. and can vary by region, shop, and whether parts are OEM or aftermarket. Labor times are estimates and may differ by technician skill and local shop rates.

• Brake pedal/brake light switch replacement

  • Parts: $10–$40
  • Labor: $60–$120
  • Estimated total: $70–$160

• Vehicle Speed Sensor (VSS) replacement

  • Parts: $20–$120
  • Labor: $80–$200
  • Estimated total: $100–$320

• Cruise control module replacement (or module wiring harness repair)

  • Parts: $200–$600 (module or harness segment)
  • Labor: $150–$450
  • Estimated total: $350–$1050

• Wiring harness repair (cruise control/VSS/brake switch circuits)

  • Parts: $50–$200
  • Labor: $100–$400
  • Estimated total: $150–$600

• Fuses/relays replacement in the cruise control circuit

  • Parts: $5–$20
  • Labor: $20–$50
  • Estimated total: $25–$70

• Software update / ECU reflash (dealer or capable shop)

  • Parts: often included in service; software license may apply
  • Labor: $100–$250
  • Estimated total: $100–$250

• General diagnostic fee (if applicable)

  • Typical diagnostic charge: $80–$150 (can be waived if you approve the repair)

Notes on costs

• If the fault is intermittent or wiring-related, costs may stay lower (repair of a harness or connector) versus replacing a sensor or module.
• Aftermarket or refurbished parts may reduce cost but could impact reliability; OEM parts tend to be more expensive but with better compatibility.

7. DIY vs PROFESSIONAL

• DIY feasibility (good for the mechanically inclined with electrical skills)
  • Brake switch inspection/adjustment is usually straightforward.
  • Replacing a VSS is a moderate task requiring some transaxle/transmission access and correct torque specs.
  • Inspecting and cleaning connectors, fuses, and grounds is accessible to DIYers with basic tools.
  • Reflashing ECU software or diagnosing cruise control module faults often requires specialized scan tools and access to OEM software/calibration, so consider a professional for software-related steps.
• Professional route (recommended if you’re not confident)
  • Accurate diagnosis of the VSS signal vs. brake switch vs. cruise control module often benefits from live data monitoring and professional diagnostics.
  • A pro can perform precise wiring checks, perform controlled tests on the vehicle while in motion, and perform software updates with the proper tools.
• Safety considerations
  • When working around the brake system and electronics, disconnect the battery if you’ll be unplugging components that could short and follow correct safety procedures.

8. PREVENTION

• Regularly verify brake pedal switch alignment and function; ensure brake lights function properly.
• Periodically inspect the VSS and its wiring for wear, especially in areas with exposure to heat, dirt, or road debris. Repair any insulation damage promptly.
• Keep electrical connectors clean and dry; use dielectric grease on plastic connector seals where appropriate to prevent corrosion.
• Update the vehicle software when OEM updates are released; software fixes can address input-signal handling and module communication issues.
• Avoid aftermarket wiring hacks or non-OEM modules that interact with the cruise control circuit unless specifically designed for the vehicle.
• Schedule routine maintenance that includes a thorough electrical system check during large service intervals.

Summary

• P0571 on a 2019–2023 Jeep Cherokee indicates a cruise control input signal circuit fault, commonly related to brake switch integrity, VSS/wiring, cruise control module, or ECU software. Because there are no documented recalls or complaints in the provided data, the diagnostic approach emphasizes standard electrical and signal-path checks. Follow a logical diagnostic path: brake switch, VSS and wiring, cruise control module and harness, software update, then repair or replacement as needed. Costs vary widely by component and labor, with DIY repairs typically costing less than professional service. If you’re not comfortable with electrical diagnostics, seek a qualified technician to ensure correct diagnosis and safe repair.