FixVault
Home › Toyota › 1991 › Supra 7M-GE, Standard, R154 › Repair and Diagnosis › Engine Performance › System › Engine Controls - Tests W/Codes - 6-CYL › Code Charts › Code 52 - Knock Sensor Signal › Probable Causes:

Probable Causes:

NOTE: Diagnostic chart not available from manufacturer.
About FixVault