P0325 · blink 52 – KNOCK SENSOR CIRCUIT MALFUNCTION

System

EFI 1NZ-FE/2NZ-FE

Dashboard light

Malfunction indicator lamp (Check Engine)

Check-engine blink code

52

Applies to

2NZ-FE 1.3 (PK XLi/GLi NZE120) and 1NZ-FE 1.5 (JDM NZE121/NZE124 Corolla/Fielder/Runx)

Description

KNOCK SENSOR CIRCUIT MALFUNCTION

Detection / symptoms

Detection: No knock sensor signal to engine ECU with engine speed 1,280 r.p.m. or more

Possible causes

Open or short in knock sensor circuit; Knock sensor (looseness); Engine ECU

What to check

Workshop check order (RM821E): CHECK HARNESS AND CONNECTOR -> INSPECT KNOCK CONTROL SENSOR -> CHECK HARNESS AND CONNECTOR(ENGINE ECU−KNOCK CONTROL SENSOR)

Confidence

high (official Toyota RM821E)

From the factory service material. Clear the code and test-drive to confirm it returns. Search all fault codes · Common problems · Warning lights

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