Honda pilot becoming a nightmare
Hi All,
New to this forum and hunting an issue down with my 2008 Pilot. Have had no luck whatsoever so need all your expertise 3 months ago the car began to shake at 20mph lose acceleration and judder at 20mph and 40mph, generally around gear changes. Engine noise increased and gradually became louder in the rear cylinder rack. Sometimes the CEL would start to flash and lose all acceleration alongside revs fixed in idle at 1,500rpm. Error codes were talking about the VCM stuck on I was advised the engine was shot and to replace. I did so and 4 weeks afterwards we are back to the same issue. VCM stuck on, random misfires in all a cylinders, plus a couple of error codes relating to VCM sol and HO sensors. We serviced the car 4 days ago and checked the oil yesterday and have found a lot of Aluminium inside. something is grinding but cant identify. after replacing the engine i am at a loss as to what can be the problem it is back to exactly the same issue as before the replacement. We have changed plugs, engine, washed nozzles, checked oil sump for blockage, checked fuel pump etc. Is it an electronic, sensor fault? what is the error VCM stuck on? I cant find any reference to this anywhere online. Any help highly appreciated... |
Re: Honda pilot becoming a nightmare
gentle nudge on the above - from my reading there are issues with the O2 sensors and the cat but need to understand what else may be behind the fault...why cant i find any info online on "VCM stuck on"
Codes from diagnostic are below: 152-06 HO2 (AF SENSOR) B2 S1 HEATER CIRCUIT HIGH VOLTAGE 156 -16 HO2 (AF SENSOR) B2 S1 LABEL CIRCUIT HIGH VOLTAGE 21-08 VARIABLE CYLINDER MANAGEMENT SOL. V. CIRCUIT HIGH VOLTAGE 161-18 HOS2 B1 S2 CIRCUIT LOW VOLTAGE 114 - 06 VARIABLE CYLINDER MANAGEMENT SYS STUCK ON 166-01 CATALYST B2 EFFICIENCY BELOW THRESHOLD also codes related to RANDOM MISFIRES IN ALL CYLINDERS |
Re: Honda pilot becoming a nightmare
Sorry to read this. No idea on why all this is happening.
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Re: Honda pilot becoming a nightmare
Originally Posted by fritfly
(Post 49255305)
I was advised the engine was shot and to replace. With all those sensor failure codes who knows. I would be looking at electronics or electrical though, not mechanical issues. |
Re: Honda pilot becoming a nightmare
yes looking at possibly replacing the ECU or working through the sensors somehow.But wouldnt the ECU just not function at all if it was shot?
Who advised it;-? 3 seperate mechanics. The fact that there was metal in the oil, the engine was making an exceedingly rough sound, one of the tappets at the rear had cracked alongside a hairline crack in the crankshaft seating. Exactly the same issue then as now so clearly the mechanical engine isue is an outcome of something else. Im now trying to work out what that can be. I just cant find any reference to the VCM stuck on issue anywhere |
Re: Honda pilot becoming a nightmare
An PCM is a circuit board, there's lots of things that can go wrong on a circuit board and it will still "function". It's just computer programming reading voltages and adjusting other voltages according to the programming. If it is seeing X voltage input incorrectly it can adjust Y output according to code, even if that's not correct. Components fail prematurely occasionally, it happens.
It is easy to tell "yes this motor is shot, there's metal things where there aren't supposed to be" but they didn't bother asking "Why"? It's a Honda and it's 5 years old. That would raise a red flag to me that something else was awry besides the motor spontaneously failing. Did your old motor throw codes before it failed? |
Re: Honda pilot becoming a nightmare
yes the codes were similair; predominantly based around the VCM system.
Unfortunately I'm in a location (west africa) where mechanics are not the most well trained and conditions are not cohesive for proper testing etc. so you have to allow for some errors, but like you say a honda only 5 years old shouldnt be having these issues. unfortuntately it is. Having talked through with some logical tech minded people here we are going to test the o2 sensors and Cat, then try the ECU and other sensors. I suppose I was hoping someone had a magic wand on here that could tell me for definte what it would be. Thanks for your assistance so far, its helpful! |
Re: Honda pilot becoming a nightmare
maybe find another 08 pilot and swap the ECU just to give it a try. I also agree that its an electrical problem causing mechanical problems.
HIGHLY HIGGGHHHLLYYY doubt it, but last time i had that many CELs on at once the problem was a bad ground at the alternator. |
There was a bulletin regarding vcm on the 2wd pilots
The vcm system had to be replaced from the rear cylinder head |
Re: Honda pilot becoming a nightmare
Originally Posted by fritfly
(Post 49256694)
3 seperate mechanics. The fact that there was metal in the oil, the engine was making an exceedingly rough sound, one of the tappets at the rear had cracked alongside a hairline crack in the crankshaft seating.
Exactly the same issue then as now so clearly the mechanical engine isue is an outcome of something else. Im now trying to work out what that can be. I just cant find any reference to the VCM stuck on issue anywhere so you repaired the engine mechanically, but is now hunting for the cause? the only result i got from your key search words: http://www.odyclub.com/forums/9-prob...vcm-stuck.html click on the youtube link within that forum i linked |
Re: Honda pilot becoming a nightmare
Time to trade it in !
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