[home][rumors and news][model release matrix][dealer network][desktop calendar][exhaust notes][tov forums][links][search][sponsors][garage][login]

Tire Rack Upgrade Garage
 Search for a Dealer:
 Canadian Flag US Flag
 Honda Acura
 ZIP  
2015 Accord goes on sale today, "Gets Multiple Feature Upgrades"
More.......................
NSX prototype smolders at the 'Ring
More.......................
2016 NSX Spied at the 'Ring, Part II
More.......................
Production 2016 Acura NSX caught testing at the 'Ring!
More.......................
2015 CR-V MMC info, with color list. CVT confirmed
More.......................
2015 TLX Pricing info released over the holiday weekend
More.......................
American Honda Reports June 2014 Sales
More.......................
This is probably the very first look at the 2016 Pilot. Spied by a TOV member in So Cal.
More.......................
HR-V/Vezel --> Re: Chinese Vezel / HR-V gets better sheet metal!!
Join Discussion......
Photoshops --> Re: calling out for some more tweaks to TLX
Join Discussion......
Professional Motorsports --> F1 - 2014 Italian Grand Prix
Join Discussion......
Today's Reading Links --> New Honda XR-V for China
Join Discussion......
General Talk --> Re: CTR coming!!!
Join Discussion......
General Talk --> Re: Inverview with Acura's Design Chief
Join Discussion......
General Talk --> Re: Driving Honda - The Book
Join Discussion......
The Tire Rack: Wheels and Tires Forum --> Re: New Michelin model anytime soon?
Join Discussion......
Accord --> Re: Accord facelift in Russia
Join Discussion......
Photoshops --> Re: 2016 Acura Integra
Join Discussion......
CR-V --> Re: 2 months until 2015 MMC?
Join Discussion......
TLX --> Re: Where is the TL's replacement?
Join Discussion......
Civic --> Re: Any new info on CTR?
Join Discussion......
General Talk --> From Sidney, Nebraska
Join Discussion......
TLX --> Re: Acura TLX Reviews
Join Discussion......
TOV First Drive: 2015 Acura TLX
Read Article....................
Photo Gallery: 2015 Acura TLX 2.4 P-AWS
Read Article....................
Photo Gallery: 2015 Acura TLX 3.5L SH-AWD
Read Article....................
TOV Photo Gallery: 2015 Honda Fit
Read Article....................
PR Photo Gallery: 2015 Honda Fit
Read Article....................
TOV Dyno Test: 2014 Accord Hybrid
Read Article....................

[fancy] [flat] [simple]
TOV Forums > Repair and Maintenance > > Re: Trouble Code P1259

Go to:

Viewing Threshold (What is this?)

Thread Page - [1]
Author
  Post New Thread
sd_accord
Profile for sd_accord
Trouble Code P1259    (Score: 1, Normal) 04-18-2005 01:54
Reply to This Message Attach Quote to Reply

Hey guys...

I drive a 2002 Accord EX w/ about 85,000miles on it. My check engine light keeps popping on and off. More on than off. I had a friend of mine plug his little gizmo in to find out what the error code was and it read P1259. Upon doing a little research, I guess this means I've got "VTEC System Malfunction."

Does anyone have any idea what this entails? I notice that the car sputters at times around 3500-4000rpms, and I wonder if that has anything to do with it? Is this something I absolutely need to take to a Honda dealer for or should just any old "honda specialist" be able to fix this problem?

I'm a new member and would appreciate any heads up if anyone's got any advice.

Thanks in advance!
BlueAccord
Profile for BlueAccord
Re: Trouble Code P1259    (Score: 1, Normal) 04-18-2005 03:23
Reply to This Message Attach Quote to Reply
Don't have my manual here right now... I can post diagnostic details tomorrow, but basically you may have a short or open with your VTEC oil pressure switch, alternatively it could be same kind of thing with the vtec solenoid. It may just be a wiring issue. The way the VTEC oil pressure switch works is that it is a normally closed switch. The ECM sends a voltage to the switch and expects the voltage to go through the switch to ground. If the ECM reads a voltage on that circuit when the VTEC system should not be operating, it will turn on the "check engine" light and set a code. This code will be a P1259 on a vehicle with OBD-II. So if it isn't reading the voltage going to the ground, then it may think the vtec is activating when it shouldn't be. That's why it sputters around those RPM's. Also, to set the light the event has to occur multiple times, so if it is an intermittent failure (say there is a wire that moves and sometimes makes contact, and sometimes doesn't), then it wouldn't necessarily set the engine light.
sd_accord
Profile for sd_accord
Re: Trouble Code P1259    (Score: 1, Normal) 04-18-2005 09:55
Reply to This Message Attach Quote to Reply
BlueAccord:

I appreciate the quick response and would appreciate the you posting diagnostic details as well. Do you know if this is quite an expensive fix? and is this a Dealer only type repair or could I trust any old shop to go at it?

Thanks again
spicer
Profile for spicer
Re: Trouble Code P1259    (Score: 1, Normal) 04-18-2005 17:32
Reply to This Message Attach Quote to Reply
Who changed your oil last? Make sure there's an OEM HONDA oil filter on there and that the oil level is good. I've seen many VTEC DTC's set simply because the system can't build enough oil pressure to engage VTEC which gives you that bag of shit feeling when you should be in VTEC mode screaming down the road.
sd_accord
Profile for sd_accord
Re: Trouble Code P1259    (Score: 1, Normal) 04-18-2005 20:56
Reply to This Message Attach Quote to Reply
A oil change place by my house changed the oil last. I'm quite sure it was generic and not OEM Honda, should I get my oil changed again prior to taking it into Honda for diagnostics?
sjlee
Profile for sjlee
Re: Trouble Code P1259    (Score: 1, Normal) 04-18-2005 21:33
Reply to This Message Attach Quote to Reply
I doubt that would be the problem. I change my own oil and don't use OEM Honda filters and have never had a problem with my VTEC.

Just an FYI... OEM Honda filters are made by FRAM... at least the ones here in the US. So, if you're going to use those, you might as well get a FRAM.
BlueAccord
Profile for BlueAccord
Re: Trouble Code P1259    (Score: 1, Normal) 04-18-2005 23:38
Reply to This Message Attach Quote to Reply
Ok, so the Honda Manual has a long testing procedure, involving mainly figuring out if and where there is a short/open or if one of the switches itself is broken. If you have a voltmeter/ohmeter/continuity checker then you can do a lot of the tests, but you would have to be able to locate the VTEC oil pressure switch and possibly the VTEC solenoid. I do a lot of work on my car myself so I have the manual as well as the circuit tester needed to check out this stuff, not sure if you have one. In any case, the first and simplest thing to do is this:

Reset the ECM/PCM by pulling fuse 13 out from the passenger side fuse box (this is the clock-backup fuse). Keep it out for at least 10 seconds, then stick it back in. Then drive until your car has reached normal operating temperature. Once your car is warm, accelerate in 1st gear until RPM's are over 4,000, hold it here for over 2 seconds. If the code shows up again, then you can either do contiunity testing (I can post details, but locating the connectors isn't that easy without the manual), or take it in. If the code doesn't show up, repeat the test (1st gear, hold over 4,000 RPM's for over 2 seconds) a couple more times. If the code still doesn't show up, then you probably just have poor connections or loose wires around the ECM/PCM or the VTEC solenoid valve. (The ECM/PCM is located between the footwells of the driver and passenger, essentially underneath the stereo, towards the firewall. To locate it, peel back the carpet on the passenger side where the footwell meets the center console. You can check if there are any loose connectors or wires there.)

If you want the electronic testing details I could take a picture of the pages in the honda manual (I don't have a scanner), but otherwise you should probably take it in to a shop. I have my doubts that taking it in to any old shop would be much cheaper if they have to end up replacing any of the switches. If you buy a manual and do it yourself you can save by buying genuine Honda parts for a lot less on the internet (such as on hondapartsdeals.com). Otherwise, just take it in to your Honda dealer if the light comes back on after doing the tests.
sd_accord
Profile for sd_accord
Re: Trouble Code P1259    (Score: 1, Normal) 04-19-2005 01:34
Reply to This Message Attach Quote to Reply
BlueAccord:

Thank you so much for the reponse once again. I'm going to do the test in the morning on the way to work.

As a side note, I got my oil changed about 4,500 miles ago (I do it ever 5,000). The previous post said to check my oil and holy shit, i notice it was waaay low. So I dump a quart of castrol 5w-20 in it, check the stick and it was still low, 2 quarts later (3 total) and I'm just between the first and second dots...

Could this have caused my problem?
sd_accord
Profile for sd_accord
Re: Trouble Code P1259    (Score: 1, Normal) 04-19-2005 09:13
Reply to This Message Attach Quote to Reply
Blue:

Thanks for your response once again...I'll test it tomorrow morning and post if you guys are interested...

After the oil post I decided to check my oil...and noticed it was WAY low...3 quarts later and I'm sitting in between the two dots!!! I just got my oil changed 4,500 miles ago WTF!!! no leaks nothing!

Could this have caused my problem?
sd_accord
Profile for sd_accord
Re: Trouble Code P1259    (Score: 1, Normal) 04-19-2005 09:14
Reply to This Message Attach Quote to Reply
uh, i posted, and it said there was an error and i had to repost...but obviously there wasn't!
sjlee
Profile for sjlee
Re: Trouble Code P1259    (Score: 1, Normal) 04-19-2005 10:07
Reply to This Message Attach Quote to Reply
That could have been the cause. I'd say monitor it today... if the light stays off, then that was the cause.

As far as the oil consumption... if you're not leaking it, you're burning it. You'll probably want to check the oil level everytime you fill up with gas... to see how fast you're losing oil. Could it be the place that did the oil change didn't put enough oil in?

In any case, that amount of oil loss is excessive and should be watched closely.
superemm
Profile for superemm
Re: Trouble Code P1259    (Score: 1, Normal) 07-06-2008 04:15
Reply to This Message Attach Quote to Reply
I have a '98 accord that is also losing power between 3800-4000 rpms, I took it to autozone today and had them run the diagnostic, the computer spit out 10 codes, 7 of them came up multiple times.

I am hoping it's a simple filter, pressure or valve problem...

the vtec code info on this thread helps a lot...
but I do need to know is if there is any harm in driving the car over a long distance (ie 180miles). while it is having the vtec problem...


other problems with the car that the diagnostic scan spit out;
possible fuel/air ratio running lean
insufficiant flow in the exhaust gas recirculation system
fuel compensation value for bank 1 exceeded the specified range
EGR valve lift insufficient detected
catalytic converter efficiency for bank 1 is below threshold for the current engine operating conditions.
EVAP emission control system leak
and the VTEC system malfunction.

and also, any direction on these would be greatly appreciated as well.
 
Thread Page - [1]
Go to:
Contact TOV | Submit Your Article | Submit Your Link | Advertise | TOV Shop | Events | Our Sponsors | TOV Archives
Copyright © 2014 Velocitech Inc. All information contained herein remains the property of Velocitech Inc.
The Temple of VTEC is not affiliated with American Honda Motor Co., Inc. TOV Policies and Guidelines - Credits - Privacy Policy
mobile: 0