Lit up like a christmas tree while driving

[dmonares]

Well today I had a weird one. I was cruising along and all of the sudden about every light on my dash indicators lit up, 3 amigos, hazards, everything. Then I was losing fuel and then pulled over to the median. I have a hand held obd scanner and came up with the following codes: P1884 P0335 P1668. It would turn over but not start, called a tow truck and they took me home. When I got home we pulled it off the flat bed and then I decided to see if it would turn over and bamm! Turns over no problem. I cleared the codes and let it idle for a while and was just fine, no codes. I dont want this to happen to me again so I figured I would ask the pros.

?

 

[KyleT]

start at the grounds at the right (pass side) fender, near the fusebox. this is where the ecm, bcu, everything grounds at.

 

[dmonares]

start at the grounds at the right (pass side) fender, near the fusebox. this is where the ecm, bcu, everything grounds at.

Ill give it a shot.

 

[mulisha00]

I might be pissing in the wind on this one but if the truck shuts down while your going down the road and every light came on I would say this was normal in the sense that when you turn the key on for the first time everything lights up all at once.

As to what shut you down I don't know.

 

[dmonares]

Well I know that P1668 is an alarm fault. I am thinking the alarm was doing a fuel cut off. But no horn honking. I hope the ECU didnt take a dump or is about too

 

[dmonares]

I went out and checked my grounds, battery terminals, etc... all my grounds were clean and tight. The positive battery terminal was covered in acid so I gave it a baking soda bath and a wire brush cleaning and it looks like new again. Before I cleaned the terminal I checked for any voltage drops or irregularities and the acid was not effecting the electrical system. Started up without any issues and let it idle for around 5 min with still no issues. Charging system at idle is right at 14.29vdc checked for any voltage drops when testing the grounds and it stayed consistent. Voltage at the relays and fuses stayed consistent.

 

[dmonares]

i was reading on another board that some people have had similar problems. turns out it was the crank positioning sensor.

 

[singingcamel]

CKps would'nt light the dash up ! bad ground to the battery or failing alt would present like this ..

 

[dmonares]

if it was a failing alternator wouldnt my battery be dead? I know once an alternator fails the vehicle will still run but just off of battery power till that has run out of juice.

 

[singingcamel]

Your right ,check your connections tho.

 

[dmonares]

ok, I let the Disco run at idle in my driveway to see if I could reproduce the issue. After around 15 to 20 minutes it just died. The power was still on and the engine temps were good. I was working on my project car in the garage so I couldnt see if anything lit up again. No codes, wont start.

@singingcamel all connections are good, grounds good, fuses good.

 

[stu454]

ok, I let the Disco run at idle in my driveway to see if I could reproduce the issue. After around 15 to 20 minutes it just died. The power was still on and the engine temps were good. I was working on my project car in the garage so I couldnt see if anything lit up again. No codes, wont start.

@singingcamel all connections are good, grounds good, fuses good.

That sounds like a CKPS (crankshaft position sensor). I can't speak to the codes, though.

 

[dmonares]

That sounds like a CKPS (crankshaft position sensor). I can't speak to the codes, though.

Thanks stu, I am off to the LR dealership. This is what I thought it was going to be after reading another thread but the lights and the codes threw me for a loop. 100.00 for each guess on what could fix the problem could add up quickly.

 

[dmarchand]

Money is on Crank pos sensor as well. HAd this happen (exact symptoms) to me this spring. Shut down repeatedly on the highway. Replaced CKPS. All has been good.

 

[singingcamel]

I have had two failures of ckps and never had dash light issues, interesting.
The only time I had the christmas lights is when my alt died while driving.
Sounds like you had a Major electrical loss for a moment..Good luck and let us know.

 

[dmonares]

I was able to get the crank sensor out but that damn dongle is a nightmare. Any secrets? I am going to drop the exhaust in the am to see if I can get it out.

 

[dmonares]

Fixed. what a nightmare it was to change out.

 

[dmarchand]

I was able to get the crank sensor out but that damn dongle is a nightmare. Any secrets? I am going to drop the exhaust in the am to see if I can get it out.

It is fiddly. If you have meaty hands you are screwed. Best to lay under the truck head towards front and work in next to the exhaust.

 

[clarkwjackson]

I had the same experience trying to reinstall mine, I went with the grease up my arm and force it between the frame and exhaust. I eventually got it then I came across the video...hope this isn't too late.

http://www.youtube.com/watch?v=p3HYZsC9UGI&feature=youtube_gdata_player