For Shop Owners

P2646 HONDA - Rocker Arm Oil Pressure Switch Circuit Low Voltage

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3 What does this mean?

Possible causes

  • Check engine oil level, oil condition and pressure
  • Faulty Variable Valve Timing and Lift Electronic Control (VTEC) / Rocker Arm Oil Pressure Switch
  • VTEC/Rocker Arm Oil Pressure Switch harness is open or shorted
  • VTEC/Rocker Arm Oil Pressure Switch circuit poor electrical connection
What does this mean?

Tech notes

The most common problem that can set the P2652 code is the engine oil. Before replacing any parts change the engine oil with the factory recommend oil weight.

There is a Factory Service Bulletin for the following Honda Models

2003-2012 Honda Accord L4
2002-2005 Honda Civic Si
2002-2009 Honda CR-V
2011 Honda CR-Z
2003-2011 Honda Element
2007-2011 Honda Fit

The factory bulletin suggestss that replacing the VTEC oil pressure switch (P/N 37250-PNE-G01, H/C 6737217) take care of the problem.

User Submitted Video

What does this mean?

Possible symptoms

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

P2646 HONDA Description

The Variable Valve Timing and Lift Electronic Control (VTEC) system activates the Rocker Arm Oil Control Solenoid (VTEC Solenoid Valve) by command from the Engine Control Module (ECM) / Powertrain Control Module (PCM), and it charges/discharges the hydraulic circuit of the VTEC mechanism that switches valve timing between Low and High. The ECM/PCM monitors oil pressure in the hydraulic circuit of the VTEC mechanism using the rocker arm oil pressure switch (VTEC oil pressure switch) downstream of the rocker arm oil control solenoid (VTEC solenoid valve). If there is a difference between the oil pressure condition in the hydraulic circuit that is determined by the ECM/PCM command and the oil pressure condition that is determined by the status of the rocker arm oil pressure switch (VTEC oil pressure switch), the system is considered faulty, and the Diagnostic Trouble Code (DTC) is stored.
OBDII Code P2646 Honda - Rocker Arm Oil Pressure Switch Circuit Low Voltage -

P2646 HONDA Information for specific Honda models

Need more help?

Do you need more help with the P2646 Honda code? Ask a question to our users or find an automotive repair shop near you to help fix the OBDII code

P2646 HONDA Comments

Help us improve Leave a comment below or tell us if the information above help you fix the code. What are the symptoms on your vehicle for the P2646 Honda code? Have you replaced any parts?
Any information is appreciated. Thanks
Repair Importance Level: 3
1=Low 2=Medium 3=High
Repair Difficulty Level: 3
1=Easy 2=Moderate 3=Hard

Browse All Codes For Specific Model YearBeta
Ford F150 1998 Ford F150
1999 Ford F150
2000 Ford F150
2001 Ford F150
2002 Ford F150
2003 Ford F150
Ford Fusion 2006 Ford Fusion
2007 Ford Fusion
2008 Ford Fusion
2009 Ford Fusion
2010 Ford Fusion
2011 Ford Fusion
2012 Ford Fusion
Honda Accord 2008 Honda Accord
2009 Honda Accord
2010 Honda Accord
Honda Civic 1996 Honda Civic
1997 Honda Civic
1998 Honda Civic
1999 Honda Civic
2000 Honda Civic
Infiniti G35 2003 Infiniti G35
2004 Infiniti G35
2005 Infiniti G35
2006 Infiniti G35
Nissan Altima 2002 Nissan Altima
2003 Nissan Altima
2004 Nissan Altima
2005 Nissan Altima
2006 Nissan Altima
2008 Nissan Altima
2009 Nissan Altima
2010 Nissan Altima
2011 Nissan Altima
2012 Nissan Altima
Nissan Maxima 2005 Nissan Maxima
2006 Nissan Maxima
2007 Nissan Maxima
2008 Nissan Maxima
Nissan Pathfinder 2005 Nissan Pathfinder
2006 Nissan Pathfinder
2007 Nissan Pathfinder
2008 Nissan Pathfinder
2009 Nissan Pathfinder
2010 Nissan Pathfinder
2011 Nissan Pathfinder
2012 Nissan Pathfinder
Nissan Rogue 2008 Nissan Rogue
2009 Nissan Rogue
2010 Nissan Rogue
2011 Nissan Rogue
2012 Nissan Rogue
2013 Nissan Rogue
Nissan Sentra 2002 Nissan Sentra
2003 Nissan Sentra
2004 Nissan Sentra
2005 Nissan Sentra
2006 Nissan Sentra
2007 Nissan Sentra
2008 Nissan Sentra
2009 Nissan Sentra
2010 Nissan Sentra
2011 Nissan Sentra
2012 Nissan Sentra
Toyota Camry 1997 Toyota Camry
1998 Toyota Camry
1999 Toyota Camry
2000 Toyota Camry
2001 Toyota Camry
2006 Toyota Camry
2007 Toyota Camry
2008 Toyota Camry
2009 Toyota Camry
2010 Toyota Camry
2011 Toyota Camry
Toyota Corolla 2005 Toyota Corolla
Toyota Echo 2000 Toyota Echo
2001 Toyota Echo
2002 Toyota Echo
Toyota Highlander 2001 Toyota Highlander
2002 Toyota Highlander
2003 Toyota Highlander
2004 Toyota Highlander
2005 Toyota Highlander
2006 Toyota Highlander
2007 Toyota Highlander
Toyota Prius 2004 Toyota Prius
2005 Toyota Prius
2006 Toyota Prius
2007 Toyota Prius
2008 Toyota Prius
2009 Toyota Prius
Scion xB 2005 Scion xB
2006 Scion xB
2007 Scion xB
Home - For Shop Owners - About - Privacy Policy - Terms and Conditions - - Copyright 2010-2018 - - - -
Posted and Edit by 01-24-2017

Related pages

diagnostic code p04412004 toyota camry transmission problems2000 honda civic speed sensor2000 ford f150 transmission problemsvolvo v70 fault codes2002 lincoln ls transmission problemscamaro 2003 sse90 camshaft sensorfuel pump 2000 lincoln town carc1726toyota dtc codes97 dodge ram 1500 4x4 transmissionchevrolet engine codessolenoid shiftertrouble code p0101dpfe hosemini camshaft2000 nissan maxima ecm2001 nissan sentra thermostatford lobo 2004sunfire 2.2 enginetoyota tundra catalytic converter1998 accord engine2008 suzuki xl7 code p0008po4432004 hyundai sonata transmission problemsp1391 jeep codetoyota p04201999 volkswagen passat engine2000 camry engine diagram2003 dodge ram 1500 alternator2006 chrysler 300 intake manifold2003-2006 infiniti g35tcc express2004 ford taurus transmission slippingg35 oilprius will not start check engine light on2008 jeep grand cherokee check engine lightobd ll codes2000 pontiac grand prix enginefault code p0401code po4202006 chrysler 300 egr valve96 toyota corolla enginemazda diagnostic codesacura tl torquewhere does a camshaft position sensor goaccelerator pedal position sensor problemsp340 codehonda civic 2000 ex engine2002 jeep liberty cylinder headp0122 throttle pedal position sensormercedes camshaft2002 nissan maxima oxygen sensorhyundai santa fe clutch2005 toyota tundra engine2003 mazda protege lx specsmercedes benz transmission problems2007 nissan versa oil filter2003 ford f150 exhaust manifoldrx8 catalytic converterjeep liberty ignition problems2004 jaguar x type problemsjaguar service bulletins2001 monte carlo enginegovernor pressure solenoidservice engine soon light nissan frontier2001 nissan xterra gas mileagenissan frontier code p0420where is the barometric pressure sensor located2001 nissan pathfinder mass air flow sensortoyota corolla clutch1999 toyota camry ignition switchtoyota corolla 2006 specs2000 altima problems