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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.

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What does this mean?
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Posted and Edit by 01-24-2017