Member Since: 19 Mar 2018
Location: Elm Grove, WI
Posts: 32
Cranks but no start after CKP sensor replacement code p0335
Hello Disco3 forum. First post here, but I have been active member over at Landroversonly.com forums for a decade with a series 2a in the garage.
This is my second lr3, 2006 with 145k miles on it and dealer maintained up to 120k. Truck ran great until it rained for two days straight and realized the s/r drains were gone.
Dried her out out, replaced drains, replaced transmission shifter assembly (due to various issues) and the CKP and the LR still gives me the 0335 code.
I put in a second CKP to rule out a faulty first one and the code is still there and it will not catch and run just fires for a second and dies. there is a strong smell of gas if I give it any throttle, so I believe its getting fuel.
No other codes at this point.
Before I start ripping the wiring apart any suggestions you guys have seen in the past?
Ben B.
23rd Mar 2018 9:18 pm
bboldt3
Member Since: 19 Mar 2018
Location: Elm Grove, WI
Posts: 32
After a hard reset over night, code P0335 crankshaft sensor is gone!!!
However codes U2023 and U0401 are now preventing my rig from starting.
Suggestions.
Ben
25th Mar 2018 8:27 pm
BrettKaz
Member Since: 11 Nov 2013
Location: Canberra
Posts: 209
not an expert but flooding from sunroof drain can cause short problems with wiring in Lhs footwell.... under door inner sill (loom) and to fuse cluster - would start by searching sunroof and looking at problems people had.
28th Mar 2018 1:32 am
bboldt3
Member Since: 19 Mar 2018
Location: Elm Grove, WI
Posts: 32
Thank you Brettkaz I’m taking apart right hand side loom and checking for blown fuses behind glove box this weekend I’ll report back
Ben
28th Mar 2018 2:39 am
bboldt3
Member Since: 19 Mar 2018
Location: Elm Grove, WI
Posts: 32
Click image to enlarge
I checked all the fuses in the BJB and CJB, their all fine.
I also checked the passenger floor (US spec) and the insulation underneath is damp, so ill start drying it out.
My question is: I ordered an ignition capacitor (Capacitor - Land-Rover (LR025249)) for my 2006 4.0 V6 due to some posts saying this can stop spark, but went to find it on my rig and I cannot locate it. The LR service guide says its on the drivers side above the valve cover. My guide shows it for a 2005, did they change location in 2006?
I had a similar issue with my D3, Changed the sensors but still didn’t help. would turn over, and over but wouldn’t catch.
Garage found that my belt had slipped and put the timing out. May be worth taking the belt cover off and checking.
RPS2010 D4 XS
29th Mar 2018 9:17 pm
bboldt3
Member Since: 19 Mar 2018
Location: Elm Grove, WI
Posts: 32
Its definitely in the back of my mind the timing chains being out of sync.
I would agree initially, but it raining for two days straight and putting water into the cabin, makes me think its electric. Ran great when I parked it before the rainstorm.
Ill keep everyone informed on the progress.
Ben
29th Mar 2018 9:37 pm
BrettKaz
Member Since: 11 Nov 2013
Location: Canberra
Posts: 209
Went to check if I had a newer version of the manual... I don't but found this. I don't think resetting adaptions is as simple as just crossing +/-. Also link below to Atlantic British if you have this type of diag tool.
CKP Sensor
The characteristics of the signal supplied by the CKP sensor are learned by the ECM. This enables the ECM to set an adaption and support the engine misfire detection function. Due to the small variation between different flywheels and different CKP sensors, the adaption must be reset if either component is renewed, or removed and refitted.
Member Since: 19 Mar 2018
Location: Elm Grove, WI
Posts: 32
I have an icarsoft LRii and a Hawkeye V5. It looks like with the Hawkeye I can reset adaptions.
I will try it tomorrow.
Thanks Brettkaz
31st Mar 2018 1:13 am
bboldt3
Member Since: 19 Mar 2018
Location: Elm Grove, WI
Posts: 32
Finally thawed out enough to test LR3 again and after changing CPK and still a no start, here is what I have found.
Fuel pressure... OK
Spark.... weak and intermittent. Fires on Bank 1 intermittent, but Bank 2 no spark. Checked plugs at cylinder 1 and 5. Live data shows relay ok, but ignition goes from On to off after a few cranks.
Air.... Ok
I went ahead and ordered ignition capacitor, wires and spark plugs.
Anyone change ignition capactior, as its on the back side of the engine and not easy to get to.
Thanks for input.
Ben
22nd Apr 2018 6:28 pm
bboldt3
Member Since: 19 Mar 2018
Location: Elm Grove, WI
Posts: 32
A more thorough test and repair has been complete and here are my findings. Still in a no start but cranks state:
1) Replaced Ignition capacitor
2) Replaced All ignition coils
3) Replaced All coil wires and spark plugs (long over due)
4) Fuel pressure is 65psi per Hawkeye
5) Motor cranks and turns over and all cylinders are receiving an initial spark, but only one.
6) I pulled TCM and ECU and there is no corrosion or bad terminals
7) Brand new AGM battery
I still get P0335 Crank position sensor code and U0401 ONLY IF I let it crank for more than 5 seconds continuously.
My next step was CAM position sensor and pulling the CJB out to look for corrosion. If that all looks good, then removing the intake to get a better look at the CKP wiring.
Any other thoughts?
Ben
7th May 2018 3:41 pm
parrafin23
Member Since: 04 Dec 2011
Location: Buskeud
Posts: 678
Tell me if im wrong here.. The codes points to the Crank sensor.. What does this sensor need to work? I bet my left leg that this sensor needs the 5volt ref, provided by the ECM. So on this sensor you have 3 wires right? if so, you have one ground, one 5volt ref from the ECM and you have a return to the ECM from the sensor. So when the sensor sees a "hump" is returns the 5v ref to the ecu on its "return" wire. when it doesen't see the "hump" it does send 0v on the return wire.
If you need more detailed info about how the 5 ref is used in a vehicle look up ScannerDanner on youtube.. He runs classes on this stuff, brilliant man..
just a thought..
Mr.P
8th May 2018 2:18 pm
bboldt3
Member Since: 19 Mar 2018
Location: Elm Grove, WI
Posts: 32
I’ve attached he wiring diagram it’s a two wire setup
8th May 2018 10:02 pm
parrafin23
Member Since: 04 Dec 2011
Location: Buskeud
Posts: 678
Then im not too far off then.
Could you check one thing with any of your tools at your disposal, that are capable of showing engine rpm. Connect the device and look at live values for engine rpm while cranking. If you get a sensible reading, you know the ECM recieves the correct signal from the sensor. If not, you need to check if the sensor is sending out the signal on its connector and see if you have the same cranking signal on the ECM pin.
I'd start there.. you might be hit by the curse of green crusties in a wire some where..
Mr.P
9th May 2018 7:24 am
bboldt3
Member Since: 19 Mar 2018
Location: Elm Grove, WI
Posts: 32
Mr. P.
I do get rpm data during crank. it is around 200 rpms.
I suspect now that CKP is fine if thats the indicator that its working. Seems the crank signal is functioning, its the ignition (start) signal after crank signal that fails in the CJB due to water ingress (Fuse P60)? I will pull the CJB and check for corrosion and verify fuses with a meter.
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