Good morning. I have a 2002 Accord EX Coupe, 108000 miles. 2.3 VTech? (I just bought the car 2 weeks ago). Yesterday while cruising at ~70 mph, the engine felt like it shut off for a few seconds, then resumes. This happened several times in a row. It was similar to turning the key off and on. It also shuddered 'enthusiastically' if the throttle was held down, and stopped when the pedal was relaxed. This was all accompanied by a CEL. I haven't thrown a scanner on it yet, I was on my way to drop it off for an alignment.

I read the sticky on the surge problems. Plenty to choose from. Any thoughts?

Thanks.

 

Code will provide best clue to problem. Now it could be igntion or fuel

good luck

 

Ok....

Code is P1259
---- VTEC SYS B1 FAILURE
---- VTEC SYS FAILURE

Also,

22-04
---- SHIFT SOLENOID VALVE C (OPEN)
---- SHIFT SOLENOID VALVE C HIGH INPUT
---- VTEC SYS FAILURE


I read something about low oil pressure could possibly be a problem with the VTEC operation. Coming home tonight, I stopped a little quick and saw the oil psi light flash once. I'll check the qty in a few minutes.

Edit: I have no oil showing on the stick. I'll add oil tomorrow and start the t/s....this is a new to me car, just had it for 10 days or so.....

I cleared the CEL and drove about 10 miles, no problem.

The search continues.

 

P1259 is an electrical fault (short or open) in the Vtec oil pressure switch circuit or Vtec solenoid valve circuit. If you're handy w/ a multimeter you can test the circuits and locate the fault.

First oil pressure switch test is to check for continuity (short) between pins 1 and 2 of connector. If no continuity, the switch is defective.

First vtec solenoid valve test is to check solenoid drive coil for resistance. It should have 14-30 ohms resistance.

If both above tests are good, the fault can be connector, wiring, or PCM internal fault. Diagnostics from shop manual are suggested (automanualsource.com for $22) .

good luck