P0012 Honda Civic
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 Honda Civic 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 Honda Civic.
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 Honda Civic.
Common Causes on Honda Civic
- Worn or stuck VTC actuator not advancing timing properly
- Low oil pressure from degraded oil or low oil level
- Clogged oil control valve screen (debris in solenoid filter)
- Stretched timing chain causing retarded cam timing
- Oil dilution from fuel in crankcase (1.5T L15B7 models)
Symptoms
- Check Engine Light on
- Reduced fuel economy
- Rough or unstable idle
- Lack of power during acceleration
- Possible cold-start rattle
Notes for Honda Civic
On 1.5T models, check oil level and smell for fuel — oil dilution from DI fueling strategy can thin oil enough to cause cam timing faults.