2000 Acura Integra Engine rattles & Engine light on

WAY2GO_2005

MEMBER
2000 ACURA INTEGRA
4 CYL
2WD
AUTOMATIC
140,500 MILES

Dear car experts,

I have an Acura Integra LS 2000. The engine light has come on for the last few days. When scanned, it returns a few codes.

P0300, P0301, P0302, P0304 and P1399. I believe the 1st 4 codes are engine misfired or something to that nature. Do you know what the last code (P1399) is? My husband has helped me changed the 4 spark plugs but the engine light is still on. Since the engine light has come on, I've noticed that my car rattles very badly when I stop at the red light or at a stop sign. It makes me very nervous. Any ideas what may be going on wrong with my car? Thank you in advance for your help & time.

6 Replies

F4I_GUY

MECHANIC
3,302 POSTS

P1399 is not a common code and I have tried researching what it means. I am pretty confident that it means it's a manufacturer controlled ignition or misfire DTC.

So it looks like you have a bunch of mis-fires.

Without seeing the vehicle, I would recommend doing a full tune-up. Ignition cap, rotor, spark plug wires, spark plugs (make sure the ones your husband put in were NGK), fuel filter, PCV valve.

This should cure your problem.

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Monday, May 4th, 2009 AT 8:47 PM

KHLOW2008

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P1399 is a temporary code for engine misfires and this is usually found only in V6 models.

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Tuesday, May 12th, 2009 AT 1:51 PM

WAY2GO_2005

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Yeah, unfortunately, I get this 1399 code even though my car is only a 4-cylinder one. I took it to the shop yesterday & after hours of diagnostic, they told me that one of the valves has been clogged. They have to take everything in the engine apart & replace this valve & also a major head clean up. They explained to me that this process is similiar to a very very major engine tune-up. It costs $900 & I have to leave them my car for 3 days. I hope after going thru this, my Acura will be great & the rattling goes away.

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Tuesday, May 12th, 2009 AT 2:15 PM

KHLOW2008

MECHANIC
41,814 POSTS

Misfiring codes requires the problem to repeat twice before a code is set and P1399 is in between, ie the first time it trips and is stored as a temporary code. When the same code occurs again, it becomes a confirmed code of P0300 to P0306 if 6 cylinders.

Too bad the valve is causing the problem. The cylinder head would have to be removed to do the repairs.

Btw the way was a compression test done?

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Tuesday, May 12th, 2009 AT 2:42 PM

WAY2GO_2005

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Thanks for your explanation on the codes. Yeah, I did get a bunch of misfired codes. I think the compression test was done (not sure since I don't know anything about car). My husband talks to them.