P0571 Code: Chevrolet Malibu (2017-2023) - Causes, Symptoms & Fixes

No recalls found in NHTSA database

Reality check on the data provided: The official NHTSA data you shared for 2017–2023 Chevrolet Malibu includes 2 owner complaints (P0302 and P0420) and explicitly notes no recalls. There are no documented Malibu-specific complaints for P0571 in that data sample. The guide below combines what P0571 generally means for Chevrolet Malibu with practical, model-relevant diagnostic steps, while clearly signaling where we’re relying on general knowledge rather than dataset specifics.

CODE MEANING AND SEVERITY

• What P0571 means (general definition): P0571 is a fault in the Cruise Control/BRAKE switch input circuit, described as Cruise Control Brake Switch A Circuit Range/Performance (sometimes phrased as “Cruise Control Brake Switch A Circuit Range/Performance”). It indicates the PCM/ECU is seeing an abnormal signal from the brake switch input that feeds both the brake switch and cruise control logic.
• What this means for the Malibu: The brake switch signal (which tells the PCM when the brake pedal is pressed) is not within expected range or is erratic. This often affects the cruise control system (engagement/disengagement) and can cause incorrect brake state reporting.
• Severity: Generally not a direct safety hazard like a brake hydraulic problem, but cruise control may not work reliably. In some cases, a faulty brake switch can also affect brake-light signaling or trigger other control modules, so it’s not something to ignore. Some owners report intermittent cruise control issues or a warning light, while others may see no obvious symptom beyond the DTC.

COMMON CAUSES ON CHEVROLET MALIBU

• Faulty or misadjusted brake light switch/brake pedal position switch: The switch at the brake pedal can wear, fail to be pressed fully, or be misadjusted, causing incorrect brake signal.
• Wiring harness problems: Damaged, frayed, or corroded wiring between the brake switch and the BCM/PCM or cruise control module; exposed wires near the pedal area or under the dash.
• Loose or corroded electrical connections: Connectors at the brake switch, cruise control module, or BCM can cause intermittent signaling.
• Faulty brake switch itself: A defective switch can send erratic or out-of-range signals.
• Cruise control module or BCM fault: In some cases, the problem points to the cruise control logic or body control module interpreting the brake switch input incorrectly.
• Voltage supply or grounding issues: Low battery voltage, bad alternator, or ground problems can create abnormal sensor readings.
• Related/simultaneous codes: P0572 (Cruise Control Input Range/Performance — B Circuit) or P0573 (Cruise Control Input Range/Performance — C Circuit) can appear if the issue involves multiple brake switch input paths or related wiring.

SYMPTOMS (typical for P0571 on Malibu)

• Cruise control may not engage, or may disengage unexpectedly.
• Intermittent or unstable cruise control performance.
• Brake lights function normally, but in some cases a brake-light signal issue could be observed if the brake switch itself is failing.
• The MIL (check engine light) may illuminate with P0571 stored in the PCM.
• Infrequent daytime symptoms: no obvious symptoms other than the light and a code during a scan.

DIAGNOSTIC STEPS

Note: If you’re not comfortable with electrical diagnostics, this is a job for a professional tech. Basic safety first: disconnect the battery if you’re going to work on the brake switch area, and never test electrical circuits with the battery connected if you’re probing exposed conductors.

• Step 1: Verify no recalls or TSBs (per dataset limitation). Data shows no recalls in the provided sample; proceed with standard diagnostic flow.
• Step 2: Read the DTC and capture freeze-frame data with a capable OBD-II scan tool. Note vehicle speed, brake switch state, cruise control status, and any other related codes.
• Step 3: Inspect brake lights and brake switch region:
  • Confirm brake lights illuminate when the brake pedal is pressed and go out when released.
  • Inspect the brake pedal assembly for excessive pedal height or misadjustment of the switch plunger.
• Step 4: Test the brake switch signal:
  • With the ignition on (and engine off, if the vehicle design allows), check for continuity across the brake switch terminals as the pedal is pressed and released.
  • Use a multimeter to confirm stable, clean signal transitions; look for voltage dropouts or erratic readings when the pedal is pressed.
• Step 5: Inspect electrical connectors and harnesses:
  • Disconnect/reconnect the brake switch harness and inspect for corrosion, bent pins, or damaged insulation.
  • Inspect the wiring harness along the pedal area for chafing or pinched wires; look for water intrusion or oxidation.
• Step 6: Verify power and ground to related modules:
  • Check that the brake switch signal line has proper power/ground references as required by the Malibu’s BCM/PCM wiring diagrams.
  • Check for battery voltage stability; repair any parasitic draw if present.
• Step 7: Check for related codes and live data:
  • Use the scan tool to monitor the brake switch signal in real time; look for intermittent drops or “stuck” states when the pedal is not pressed.
  • Monitor cruise control status and PCM input signals to determine if the brake switch input is being read consistently.
• Step 8: If the brake switch and wiring test cleanly but the DTC persists:
  • Consider testing/monitoring the cruise control module or BCM for faults. Some Malibu models allow module re-flash or software updates that address input signal handling.
• Step 9: Repair steps based on findings:
  • If brake switch is faulty or misadjusted: replace or adjust the brake switch.
  • If wiring/connectors are damaged: repair or replace harness sections, clean/repair connectors, and secure routing to prevent future chafing.
  • If BCM/cruise control module is suspected: diagnose with OEM scan tool, consider software update or module replacement as required.
• Step 10: Clear codes and re-test:
  • After repairs, re-scan to confirm P0571 is cleared and verify the symptom resolution under multiple drive conditions (idle, light throttle, braking, cruise control engagement).

RELATED CODES

• P0572: Cruise Control Input Range/Performance - B Circuit (another variant in the same family; often indicates the input path or signal quality issue).
• P0573: Cruise Control Input Range/Performance - C Circuit (additional path/fault in the input circuit).
• Note: These are commonly considered relatives in the same diagnostic family; a failure in one often prompts inspection of the brake switch input wiring and related modules.

REPAIR OPTIONS AND COSTS (2025 PRICES)

Prices vary by region, shop, and whether you use OEM or aftermarket parts. All ranges are approximate nationwide averages:

• Brake light switch replacement (common fix for P0571 when the switch is faulty or misadjusted)

  • Parts: $15–$60
  • Labor: $40–$120
  • Typical total: $55–$180

• Brake switch adjustment (if misadjusted, often a low-cost fix)

  • Parts: minimal (often included with switch)
  • Labor: $20–$60
  • Typical total: $40–$100

• Wiring harness repair (damaged/abused wiring)

  • Parts: $10–$100 (harness section and connectors)
  • Labor: $60–$250
  • Typical total: $70–$350

• Brake switch replacement + module wiring check (if switch is fine but signaling is still out)

  • Parts: $20–$120 for switch; additional parts if harness repair is needed
  • Labor: $60–$200
  • Typical total: $80–$320

• Cruise Control Module/BCM diagnostic + software update or replacement (less common, more expensive)

  • Parts: $200–$900 (module or BCM replacement)
  • Labor: $150–$450
  • Typical total: $350–$1,350

• Diagnostic charge (if performed at a shop)

  • Typical range: $90–$150 (often waived if a repair is performed)

Notes:

• If a dealership performs labor, expect higher rates than independent shops.
• Software updates or re-flashing, when applicable, can incur additional costs.
• If a faulty brake light switch is not the root cause, the total repair cost can be higher due to additional wiring work or module testing.

DIY vs PROFESSIONAL

• DIY feasibility:
  • Most Malibu owners can handle brake switch inspection, adjustment, and basic electrical checks with a basic multimeter and a service manual.
  • Best DIY steps: test brake light function, inspect/adjust the brake switch, verify signal continuity, and inspect obvious wiring issues near the pedal area.
  • Precautions: disconnect battery before wiring work; avoid disturbing airbags or resistors near the steering column; use proper eye/hand protection; ensure the vehicle is secure.
• Professional considerations:
  • If the brake switch and visible wiring check out, a software/ECU/BCM level diagnosis may require factory-level scan tools and knowledge of Malibu-specific wiring diagrams.
  • A technician can perform controlled circuit tests, data logging, and module communication checks to isolate a switch, harness, or module fault.
• When to call a professional:
  • If you observe intermittent or ambiguous readings from the brake switch or the cruise control input while some related wiring looks damaged.
  • If the MIL remains on and P0571 persists after basic switch tests.
  • If a software update or module replacement is indicated.

PREVENTION

• Regularly inspect the brake pedal area for wear and ensure the brake switch plunger is properly aligned with the pedal’s pushrod.
• Keep the pedal area clean and dry; moisture and grime can affect switch performance.
• Check brake lights regularly; malfunctioning brake lights often indicate brake switch or wiring problems that can affect other control modules.
• Protect wiring around the pedal area from abrasion; use loom or split loom to prevent chafing.
• Maintain a healthy electrical system: keep the battery and alternator in good condition, as voltage fluctuations can trigger intermittent sensor faults.
• If you install aftermarket accessories near the steering column or pedal area, ensure proper installation to avoid harness pinching or signal interference.

Data limitations and how they affect this guide

• The provided NHTSA data for Malibu (2017–2023) includes two complaints (P0302 and P0420) and notes no recalls. There is no direct P0571 complaint in the given dataset, so this guide is built on general knowledge of P0571 behavior and Malibu-specific common-sense maintenance patterns rather than a Malibu-specific recall/complaint history.
• If you have access to your vehicle’s service history or a Chevrolet service bulletin database, check for P0571-related maintenance advisories or TSBs. The Anti-Fabrication rule here is to only cite recalls/TSBs that appear in the data you provided; since none appear, we list general diagnostic steps and standard repair options.
• Prices cited are 2025-era estimates and can vary by region and dealer vs independent shop. Always get a written estimate before proceeding.

Summary

• P0571 in the Malibu typically points to the brake switch input circuit as read by the cruise control/PCM system. The most common root cause is a faulty or misadjusted brake light switch, or damaged wiring. Cruise control functionality may be impacted, while braking performance is usually not directly affected unless the brake switch signal interacts with other systems.
• Start with brake switch inspection/adjustment, verify brake light operation, inspect for wiring damage, and test the switch signal with a multimeter. If the fault persists, expand diagnosis to the BCM/cruise control module and consider software updates or module replacement as needed.
• No recalls are listed in the provided dataset for this model/year. If you’re pursuing a fix, budgeting for a brake switch repair as a first step is reasonable, with potential wiring or module work if the issue remains.