P3497 - CYLINDER DEACTIVATION SYSTEM BANK 2

In certain driving conditions, the vehicle does not require the most power from the engine. In these cases, the cylinder deactivation system is generally used in vehicles with more than 8 cylinders, deactivating the corresponding cylinders to save fuel.

The cylinder deactivation system uses the variable valve timing solenoids to close the intake and exhaust valves of the deactivated cylinders. This allows cylinder gases to be trapped and reduces vibration for proper cylinder operation. The compressed exhaust gases also drive the piston backward to achieve a higher degree of overall engine balance.

The P3497 OBD2 fault code setting occurs when the Powertrain Control Module (PCM) fails to activate the cylinder deactivation system for bank 2.

• The Check Engine light turns on.
• Increased fuel consumption.
• The engine has power reduction.
• Other cylinder deactivation codes are stored.

DTC P3497 OBDII is set for one or more of the following reasons:

• The engine oil pressure or oil level may not be as required.
• A valve timing control solenoid may be bad.
• There could be bad wires or connectors in the cylinder deactivation circuit, causing an open or short circuit.

To troubleshoot the P3497 OBD2 diagnostic code, try this:

• See Technical Service Bulletins (TSB).
• Check that the engine oil level and pressure are correct for the proper operation of the system. In case you get a value out of the established parameters, make the necessary adjustments.
• Check the cylinder deactivation system circuit wiring and connectors for inconsistencies that cause malfunction. If such components are damaged, make repairs or replacements as appropriate.
• Use a digital volt-ohm meter to perform voltage tests on the variable valve timing solenoids. Compare the readings you get with those specified by the manufacturer. If there are big differences, make changes to the solenoids.