P0571 on Pontiac
Cruise Control/Brake Switch "A" Circuit Malfunction
P0571 on Pontiac vehicles indicates cruise control/brake switch "a" circuit malfunction. Au7o has documented this code across 1 Pontiac model — most commonly on G6. The brake switch ('A' circuit) signals the PCM and cruise control system when the brake pedal is applied, which must disengage cruise control. P0571 sets when the PCM detects a malfunction in the cruise control/brake switch 'A' circuit.
Common Causes of P0571
- •Faulty brake light switch
- •Misadjusted brake switch
- •Open or shorted brake switch wiring
- •Blown brake circuit fuse
- •Corroded connector
P0571 on Pontiac by Model
Pontiac G6(1 issue)
- NHTSA Recall 14V252000: BCM Connection Resistance Causes Brake Apply Sensor Voltage Fluctuations2005-2010
If you own a 2005-2010 Pontiac G6 built between May 26, 2004 and January 4, 2010, it falls under GM's safety recall 14V252000. The defect is increased resistance in the Body Control Module (BCM) connection, which can produce voltage fluctuations on the Brake Apply Sensor (BAS) circuit. Per NHTSA, one result of those fluctuations is improper brake light operation. Because the problem lies in the electrical connection feeding the BCM and BAS rather than in a single failed component, it is corrected by treating and securing the connectors themselves. The G6 was one of four GM cars swept up in this campaign alongside the Chevrolet Malibu, Malibu Maxx and Saturn Aura; the 2,440,524-vehicle figure NHTSA publishes is the total for the entire campaign, not for the G6 alone. NHTSA rates the consequence as an increased risk of a crash.
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View P0571 across all makes →Frequently Asked Questions
What does P0571 mean on Pontiac?▼
P0571 stands for "Cruise Control/Brake Switch "A" Circuit Malfunction." The brake switch ('A' circuit) signals the PCM and cruise control system when the brake pedal is applied, which must disengage cruise control. P0571 sets when the PCM detects a malfunction in the cruise control/brake switch 'A' circuit. On Pontiac specifically, this code is documented across 1 model.
What causes P0571 on Pontiac vehicles?▼
Common causes on Pontiac: Faulty brake light switch, Misadjusted brake switch, Open or shorted brake switch wiring, Blown brake circuit fuse, Corroded connector. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0571 on a Pontiac?▼
Repair costs vary widely depending on the root cause and specific Pontiac model.
Which Pontiac models have P0571 documented?▼
Au7o has documented P0571 on 1 Pontiac model: G6.