P0571 Code: Jeep Wrangler (2018-2023) - Causes, Symptoms & Fixes

Comprehensive diagnostic guide for OBD-II code P0571 on 2018–2023 Jeep Wrangler

Important data note (data limits)

• Real NHTSA data provided: No complaints found for this combination in the owner/agency data you supplied.
• Recalls/TSBs: No recalls found in NHTSA database for this make/model/year based on the data above.
• This guide also relies on general automotive knowledge for diagnostic logic and repair cost ranges. If you have access to more specific service history or factory bulletin data for your exact vehicle, factor that in.

CODE MEANING AND SEVERITY

• Code meaning: P0571 stands for Cruise Control/Brake Pedal Position Sensor Range/Performance. In Jeep Wrangler 2018–2023, this typically indicates a fault in the brake pedal position switch, the brake switch, the brake pedal position sensor (if separate), or the wiring/can bus that reports brake pedal status to the cruise control system and/or PCM/BCM.
• Severity and impact:
  • Driveability: Generally not a direct engine-damaging issue. The code most often affects the cruise control system, causing it to not engage, disengage, or behave erratically.
  • Safety: Cruise control reliability may be reduced. If the brake pedal sense is intermittent, the vehicle may disengage cruise unexpectedly. The brake pedal switch itself is a safety-critical input; persistent fault can affect other systems that rely on brake-pedal data (cruise control, idle/engine management in some configurations, etc.).
  • MIL/scan results: Expect a stored diagnostic trouble code (P0571) and possibly related codes (e.g., P0570) if there are intermittent conditions.

COMMON CAUSES ON JEEP WRANGLER (2018–2023)

• Faulty brake pedal position switch or brake light switch (the most common cause).
• Wiring harness problems: damaged, chafed, or corroded wires/connectors in the brake switch circuit or to the BCM/PCM.
• Loose or improper connectors at the brake switch, BCM, or cruise control module.
• Misadjusted brake pedal switch mounting or poor brake pedal assembly alignment.
• Faulty cruise control module or BCM that misreads the brake-switch input.
• Electrical system voltage issues (battery/alternator grounding, parasitic draw) that cause abnormal sensor readings.
• Water ingress or corrosion in the brake switch/connector area or within the pedal assembly harness.
• Aftermarket wiring or modifications interfering with the brake switch/cruise control circuit.

SYMPTOMS TO LOOK FOR

• Cruise control will not engage, or it disengages shortly after being set.
• Cruise control indicator on the dashboard remains off or behaves erratically.
• Brake lights do not function correctly (stuck on or not functioning) if the brake switch is faulty.
• Intermittent or permanent loss of cruise control functionality without other engine performance issues.
• In some cases, a warning message related to cruise control or brake pedal may appear in the vehicle’s display (depends on infotainment/cluster configuration).
• If other related codes are present, you may see related symptom combinations (e.g., intermittent electrical guises, other sensor warnings).

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

Note: Work safely, follow all vehicle-specific safety guidelines, and disconnect the battery if you will be testing electrical connectors to reduce shock risk. For any steps involving the airbag system or SRS, consult service manuals.

A. Verify and scope

• Retrieve all codes with an OBD-II scanner, note P0571 and any related codes (e.g., P0570, other brake/ABS or cruise-control related codes).
• Check vehicle software status: any recent re-flashes or dealer updates? (If so, verify the latest calibration is installed.)

B. Visual inspection of brake pedal switch and wiring

• Locate the brake pedal switch near the top of the pedal arm (where the pedal disengages the brake switch when released).
• Inspect the switch and its mounting for:
  • A misaligned brake switch (pedal position not triggering switch correctly).
  • Physical damage, cracks, or wear.
  • Loose or corroded connectors; damaged weather seals; broken harness routing.
• Inspect brake lights: confirm proper operation when pedal is pressed and released.

C. Electrical tests (brake switch circuit)

• With the ignition ON (engine not required), test the brake switch circuit:
  • Check continuity/resistance across the switch terminals with the pedal at rest and with pedal pressed (as per switch type; some are normally-open, some normally-closed).
  • If you have a multimeter and the service manual shows expected ranges, verify the output voltage when pedal is pressed (should switch state cleanly).
• Inspect for voltage and ground integrity to the brake switch circuit:
  • Look for a good ground reference at the switch connector.
  • Check for abnormal voltage drops along the harness to the BCM/PCM.

D. Functional brake switch test and swap

• If the brake light switch appears damaged or test results indicate the switch is not reliably switching state, replace the brake light switch (and brake pedal switch if separate in your model) with an OEM or quality equivalent.
• After replacement, clear codes and perform a road test to verify that P0571 does not return and that cruise control behaves normally.

E. Inspect connectors and wiring paths

• Disconnect and reseat connectors at the brake switch, BCM, and any cruise-control-related modules.
• Inspect connectors for corrosion or water intrusion; apply dielectric grease to seals if appropriate.
• Look for damaged insulation, exposed wires, or signs of chafing along the harness near the pedal area.

F. Check related components if symptoms persist

• If brake switch and wiring test clean but P0571 persists, consider:
  • Cruise control module or BCM fault (may require software update or replacement).
  • Vehicle battery health and charging system (voltage instability can cause intermittent sensor issues).
  • Re-check for any service bulletins or software updates from the dealer (not provided in your data, but worth verifying through official channels).

G. Post-repair validation

• Clear DTCs and perform a road test:
  • Confirm brake lights function correctly.
  • Attempt to engage cruise control at a safe speed and road condition.
  • Confirm that P0571 does not reappear and no related codes come back after normal driving.

RELATED CODES

• P0570: Cruise Control/Brake Pedal Position Sensor Range/Performance (a related or upstream code; often indicates a range/performance issue in the same circuit).
• P0572, P0573, etc. (other brake pedal/cruise control sensor codes): These may accompany P0571 if the fault shifts between pedal switch vs. position sensor or if the circuit has multiple fault points.
• Other sensors or modules tied to cruise control or brake function could set ancillary codes if there are electrical or grounding faults, so scan for and review any additional codes when diagnosing P0571.

REPAIR OPTIONS AND COSTS (2025 PRICES)

Prices vary by region, shop, and whether the part is OEM or aftermarket. The ranges below reflect typical U.S. pricing for common Wrangler maintenance items in 2025 dollars.

• Brake light switch replacement (brake pedal switch)

  • Parts: $15–$60
  • Labor: $50–$150
  • Typical total: $65–$210
    Notes: Often the simplest fix; if the switch is at fault and the wiring is intact, this alone resolves P0571 in many cases.

• Brake pedal position sensor replacement (if a separate sensor exists)

  • Parts: $20–$150
  • Labor: $100–$250
  • Typical total: $120–$400
    Notes: Some Wranglers use an integrated switch rather than a separate pedal-position sensor. If separate, replacement is straightforward but check for the correct sensor type and mounting.

• Wiring harness repair or connector replacement

  • Parts: $10–$150 (depends on harness section or connector)
  • Labor: $100–$400
  • Typical total: $110–$550
    Notes: Costs escalate if harness replacement or extensive damage is found. Expect more diagnostic time if the fault is intermittent.

• Cruise control module or BCM replacement

  • Parts: $300–$900 (module or BCM)
  • Labor: $200–$600
  • Typical total: $500–$1500
    Notes: More complex; may require software reprogramming or dealer-level tooling.

• Software/Calibration updates

  • Parts: typically $0–$100 (software license/flash)
  • Labor: $50–$150
  • Typical total: $50–$250
    Notes: Some cases improve or resolve P0571 with a PCM/BCM software update.

• Optional/variable costs

  • Brake lights replacement (bulbs or LEDs) if affected: $10–$60 parts, $20–$50 labor.
  • Diagnostic fees if performed at a shop: $0–$150 (often applied toward repair if you proceed with repairs).

Important caveats

• Because the provided data shows no NHTSA complaints and no recalls for this pairing, there are no official, vehicle-specific service bulletins in the supplied data to cite. If you have dealer or independent shop bulletins for your exact vehicle, consider them as potential guides.
• Actual costs can vary widely by location, dealer vs. independent shop, and whether a used/remanufactured module is selected.

DIY VS PROFESSIONAL

• DIY suitability:
  • High: Replace a faulty brake light switch, check and reseat connectors, inspect easy-to-access wiring, and perform basic electrical tests with a multimeter.
  • Moderate: If a separate brake pedal position sensor is present and accessible, replacement and basic checks are still feasible with moderate mechanical skill.
  • Low: If the fault lies with the BCM/cruise control module or if there is complex wiring harness damage, professional diagnosis is recommended.
• When to go pro:
  • If you cannot reliably isolate the fault to the brake switch or simple wiring.
  • If the cruise control system behavior remains erratic after replacing the switch and inspecting wiring.
  • If a BCM or module replacement/software reprogramming is required.
  • If you’re unsure about electrical safety or vehicle fault diagnosis.

PREVENTION

• Regular inspection of brake switch area and pedal linkage; ensure proper brake pedal height and alignment.
• Keep brake pedal switch connectors clean and dry; inspect for corrosion or moisture ingress in the pedal area.
• Use OEM or high-quality connectors and harness components to reduce re-assembly faults.
• Periodically check battery and charging system; voltage irregularities can trigger sensor diagnosis issues.
• If performing aftermarket wiring or modifications nearby the brake pedal area, ensure they do not interfere with brake switch operation or sensor readings.
• When replacing any brake-related sensor or switch, verify the correct part for your exact Wrangler year and trim to avoid compatibility issues.

Bottom line

• P0571 in a 2018–2023 Jeep Wrangler primarily points to brake pedal position switch/brake light switch, its wiring, or the associated control module inputs for cruise control. Start with a thorough inspection of the brake switch, its mounting, and the wiring harness, then proceed to replacement of the switch if needed. If the fault remains after those steps, investigate BCM/cruise-control module health and software as the next steps.
• No recalls found in the NHTSA data provided for this specific vehicle/year/service issue. Data limitations mean you should still verify with a dealer if you’re experiencing a recurring or dangerous condition, and consider professional diagnostic support if you’re not comfortable with electrical troubleshooting.