Hummer P1009 Variable Valve Timing Control Advance Malfunction

Description

Possible causes

– Engine oil level
– Dirty engine oil
– Check VTC Strainer for blockage
– Faulty VTC Oil Control Solenoid or circuit
– Faulty VTC Actuator
– Engine mechanical problems

Tech description

An stretched timing chain or damaged tensioner can also caused triggered the P1009 Hummer code. Before replacing timing chain or tensioner, check engine oil level and condition. Replaced engine oil and filter with factory recommend oil weight if necessary.

Symptoms

– Engine Light ON (or Service Engine Soon Warning Light)

P1009 Hummer ACURA OBD Code Description

The variable valve timing control (VTC) system controls the phase of the intake camshaft. It uses oil pressure to operate the VTC actuator so the valve timing is optimized depending on driving conditions. The engine control module (ECM)/Powertrain control module (PCM) monitors the phase control command and the actual timing of the camshaft by using camshaft position

(CMP) sensor A. If an over-advanced camshaft phase (compared to the directed value) continues or when the camshaft phase is otherwise abnormal, a malfunction is detected and a DTC is stored.

The OBD2 Code Information Be Applicable For Hummer:

2009 Hummer H3T Alpha,2008 Hummer HX Concept,2008 Hummer H3 Wagon Concept,2008 Hummer H3 Alpha,2008 Hummer H2,2007 Hummer H3 Open Top,2007 Hummer H3X,2007 Hummer H3R Off Road Concept,2007 Hummer H2 Safari Concept,2006 Hummer H3,2006 Hummer H2 SUT Limited Edition,2006 Hummer H1 Alpha,2005 Hummer H3 Street,2005 Hummer H2 SUT,2004 Hummer H2 SUT Concept,2004 Hummer H2H Hydrogen Concept,2004 Hummer H2,2004 Hummer H1,2003 Hummer Humvee Military Vehicle,2003 Hummer H3T Concept,2003 Hummer H2 with GM Accessories,2003 Hummer H2 SUV,2003 Hummer H2 SUT Dirt Sport Concept,2003 Hummer H1,2003 Hummer Bike,2002 Hummer H2 SUV Concept,2002 Hummer H1 10th Anniversary Edition,2002 Hummer H1,2001 Hummer H1 Alpha Concept

Note:

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