P0012 Hyundai Sonata
Intake Camshaft Position Timing Over-Retarded (Bank 1) · Powertrain Code · High · Repair: Moderate
What is P0012?
The intake camshaft timing on bank 1 is more retarded than the ECM commanded.
When the Hyundai Sonata triggers code P0012 (intake camshaft position timing over-retarded (bank 1)), it typically points to an issue in the powertrain system. This is a high severity code, so address it promptly to avoid further damage or safety concerns. Below you'll find the most common causes, symptoms, and repair options specific to the Hyundai Sonata.
This repair is rated moderate, meaning some experience and specialty tools required.
Diagnostic data on this page is compiled from publicly available repair resources and technical service bulletins. Always have a qualified mechanic confirm the diagnosis before authorizing repairs on your Hyundai Sonata.
Common Causes on Hyundai Sonata
- Stuck or sluggish CVVT actuator due to oil sludge in Theta II engine
- Worn timing chain causing retarded cam timing
- Low oil pressure from clogged oil pickup screen
- Failed CVVT oil control valve stuck in retard position
Symptoms
- Check Engine Light on
- Hard starting especially in cold weather
- Rough idle
- Poor acceleration and reduced power
- Increased fuel consumption
Notes for Hyundai Sonata
Theta II engines are prone to oil sludge; verify oil change history before deeper diagnosis.