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.

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HOMESERVICE MANUALSMAZDA20086 S SPORT, 4D HATCHBACK, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 688 (ON-BOARD DIAGNOSTIC (ENGINE CONTROL SYSTEM L3) (3 OF 5))DTC P0328NOTES

2008 Mazda 6 s Sport, 4D Hatchback, Standard

DTC P0328: Notes

2008 Mazda 6 s Sport, 4D Hatchback, StandardSECTION Notes

WARNING: This page is about a different car, the 2007 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

DTC P0328 DETECTION CONDITION AND POSSIBLE CAUSES

DTC P0328

Knock sensor circuit high input

DETECTION CONDITION

PCM monitors input signal from knock sensor when engine is running. If input voltage is below 4.77 V ⁽¹⁾ , 4.9 V ⁽²⁾ , PCM determines that knock sensor circuit has malfunction.

Diagnostic support note

This is a continuous monitor (CCM).
MIL illuminates if PCM detects the above malfunction condition during first drive cycle.
PENDING CODE is available if PCM detects the above malfunction condition.
FREEZE FRAME DATA is available.
DTC is stored in the PCM memory.

POSSIBLE CAUSE

Knock sensor malfunction
Connector or terminal malfunction
Short to power supply in wiring between knock sensor terminal A and PCM terminal 2U
Short to power supply in wiring between knock sensor terminal B and PCM terminal 2V
PCM malfunction

Courtesy of MAZDA MOTORS CORP.

⁽¹⁾	California emission regulation applicable ATX model

⁽²⁾	Except for California emission regulation applicable ATX model

RENDER: 1.0x

NO RELATED

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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.