Some 2013 Acura RDX SUVs may intermittently illuminate the check engine light and store trouble code P3400 and/or P3497 in the PCM.
One likely cause, reports Acura, is a sticking rocker arm oil pressure switch. The trouble can occur on one or both banks of the engine.
Installing a new design pressure switch and O-ring (part Nos. 37240-R70-A04 and 91319-PAA-A01, respectively) should eliminate the condition.
Before ordering the new parts, however, check the engine oil dipstick because a low oil level can cause these codes to set.
If the oil level is low, add oil, clear the code(s) and release the vehicle to the customer. If the oil level is OK or the SUV comes back with the same complaint, replace the front and/or rear pressure switch and O-ring, depending on the code(s) logged.
The location of each rocker arm oil pressure switch is shown in the illustration.
"Factory Fixes" is written by Jim DePalma, a 30-year veteran of the auto repair business who has served stints as a service manager, parts manager and ASE-certified technician. His column provides vehicle manufacturers' authentic factory technical service bulletins (TSBs) that have been condensed for easier reading. Mr. DePalma advises that techs always check with a dealer or repair information system for the latest revisions before starting to work on a vehicle. He can be reached via e-mail at [email protected].