P1346 · blink 18 – VVT SENSOR/CAMSHAFT POSITION SENSOR CIRCUIT RANGE/PERFORMANCE

System: EFI 1NZ-FE/2NZ-FE
Dashboard light: Malfunction indicator lamp (Check Engine)
Check-engine blink code: 18
Applies to: 2NZ-FE 1.3 (PK XLi/GLi NZE120) and 1NZ-FE 1.5 (JDM NZE121/NZE124 Corolla/Fielder/Runx)
Description: VVT SENSOR/CAMSHAFT POSITION SENSOR CIRCUIT RANGE/PERFORMANCE
Detection / symptoms: Detection: Deviation in crankshaft position sensor signal and VVT sensor signal (2 trip detection logic)
Possible causes: Mechanical system malfunction (Skipping teeth of timing chain, chain stretched); Engine ECU
What to check: Workshop check order (RM821E): CHECK VALVE TIMING
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