Many vehicles have variable valve timing these days. A lot of these systems are actuated using oil pressure and when they malfunction there can be several causes. Follow this Real Fix to see how this code P1009 for the variable valve timing system on this Honda Accord was diagnosed and repaired.
Vehicle
2004 Honda Accord EX 2.4L
Title
P1009, Replaced Camshaft Timing Oil Control Valve
Complaint
The customer states the check engine light is on.
Cause
Connected a scan tool and found code P1009 – VTC Advance Malfunction. Performed an inspection of the engine oil level and condition and found the engine oil was at the proper level and was clean. Used the scan tool to clear the code, test drove the vehicle and found the code returned. Removed the camshaft timing oil control strainer, inspected for a restriction and found no faults. Performed a visual inspection of the camshaft timing oil control valve wiring harness and found no faults. Disconnected the camshaft timing oil control valve harness connector, inspected the terminals and found no faults. Removed the camshaft timing oil control valve from the engine, visually inspected the valve and observed no obvious faults. Attached fused jumper wires to the camshaft timing oil control valve, supplied battery voltage and ground and found the camshaft timing oil control valve did not actuate. The results of these tests camshaft timing oil control valve was faulty.
Correction
Replaced the camshaft timing oil control valve, cleared codes, performed a road test and verified the vehicle operated properly. The check engine light did not illuminate and no fault codes returned.