P0012 Nissan Altima
Intake Camshaft Position Timing Over-Retarded (Bank 1) · Powertrain Code · High
What is P0012?
The intake camshaft timing on bank 1 is more retarded than the ECM commanded.
When the Nissan Altima 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 Nissan Altima.
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 Nissan Altima.
Common Causes on Nissan Altima
- Stuck VTC actuator due to sludge in QR25DE engine
- Worn timing chain causing retarded cam timing (common on QR25DE)
- Failed VTC solenoid stuck in retard position
- Low oil pressure from worn oil pump or pickup tube O-ring leak
Symptoms
- Check Engine Light on
- Hard cold starts
- Rough idle
- Engine rattle on startup
- Poor acceleration
Notes for Nissan Altima
QR25DE engines in Rogue and Altima are known for timing chain stretch; a startup rattle is the telltale sign.