Oil Control Valve Circuit Malfunction
Table of contents
P1656 TOYOTA Possible Causes
- Faulty Oil Control Valve (OCV)
- Oil Control Valve (OCV) harness is open or shorted
- Oil Control Valve (OCV) circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How do I fix code P1656 TOYOTA?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Cost of diagnosing the P1656 TOYOTA code
The cost of diagnosing the P1656 TOYOTA code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
When is the code detected
Open or short in oil control valve circuit
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- No start
P1656 TOYOTA Description
Variable Valve Timing (VVT) system controls the intake valve timing to proper timing in response to driving condition. The Engine Control Module (ECM) controls Oil Control Valve (OCV) to make the intake valve timing properly, and, oil pressure controlled with OCV is supplied to the VVT controller, and then, VVT controller changes relative position between the camshaft and the crankshaft.