P0340 · blink 12 – CAMSHAFT POSITION SENSOR CIRCUIT MALFUNCTION

System: EFI 1NZ-FE/2NZ-FE
Dashboard light: Malfunction indicator lamp (Check Engine)
Check-engine blink code: 12
Applies to: 2NZ-FE 1.3 (PK XLi/GLi NZE120) and 1NZ-FE 1.5 (JDM NZE121/NZE124 Corolla/Fielder/Runx)
Description: CAMSHAFT POSITION SENSOR CIRCUIT MALFUNCTION
Detection / symptoms: Detection: S No camshaft position sensor signal to engine ECU during cranking S Open in NE− circuit
Possible causes: Open or short in camshaft position sensor circuit; Camshaft position sensor; Starter; Engine ECU
What to check: Workshop check order (RM821E): INSPECT CAM POSITION SENSOR(CHECK RESISTANCE) -> CHECK HARNESS AND CONNECTOR(ENGINE ECU−CAMSHAFT POSITION -> INSPECT SENSOR INSTLLATION -> INSPECT CAMSHAFT
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