Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

SYS.OK|MANUAL.DB● LIVE

HOMESERVICE MANUALSMAZDA20105 SPORT, 2.3 L, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMON-BOARD DIAGNOSTIC [ENGINE CONTROL SYSTEM L3]DTC P0571NOTES

2010 Mazda 5 Sport, 2.3 L, Standard

DTC P0571: Notes

2010 Mazda 5 Sport, 2.3 L, StandardSECTION Notes

DTC P0571 [L3] DETECTION CONDITIONS AND POSSIBLE CAUSES

DTC P0571

Brake switch circuit malfunction

DETECTION CONDITION

The PCM monitors changes in input voltage for brake switch No. 1 and No. 2 (signal from instrument cluster). If the PCM detects that both brake switches No. 1 and No. 2 remain on or off for 15 s , it determines that the brake switch circuit has a malfunction.

Diagnostic support note

This is a continuous monitor (Other).
The MIL does not illuminate.
FREEZE FRAME DATA (Mode 2/Mode 12) is not available.
DTC is stored in PCM memory.

POSSIBLE CAUSE

CAUTION:

Inspect the brake switch with it installed to the brake pedal, otherwise the brake switch may not operate normally. If the brake switch is removed from the brake pedal, replace the brake switch with a new one.

Communication error between PCM and instrument cluster
Brake switch connector or terminal malfunction
Brake switch malfunction
Short to ground circuit between brake switch terminal C and instrument cluster terminal 2M
Instrument cluster connector or terminal malfunction
Open circuit between brake switch terminal B and body ground
Open circuit between brake switch terminal C and instrument cluster terminal 2M
Short to power between brake switch terminal C and instrument cluster terminal 2M
PCM malfunction

Courtesy of MAZDA MOTORS CORP.

RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready Tools Free Quote Check Quote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.