09 Sienna P0335 After Valve Covers

Logan Technician California Posted   Latest   Edited  
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Driveability
2009 Toyota Sienna CE 3.5L (2GRFE) 5-spd
P0335 — Crankshaft Position Sensor "A" Circuit
Code P0335 Comes On After Valve Cover Reseal

Vehicle came in for a valve cover reseal, after another tech did the job , CEL came on with code p0335. Checked all the obvious. -Checked for any loose connections or any missing grounds -Check resistance cold and hot of sensor -Checked short to ground and power on both wires -Removed compressor and got connector out, checked for connectors damage/pin issue. Pins look good and connecter sits in place good -Checked sensor placement on block- good -Scoped sensor at connector at ecm. Waveform looks clean. Sometimes vehicle will set code in the bay idling sometimes it won’t set until driving for a few mins. Was able to capture waveform while code sets. Waveform seems normal. Could something else like a cam sensor be causing this code.? Beginning to be a great PIMA….any help is greatly appreciated!!

Update! Removed the intake manifold to look for any harness issues or signs of wire issues or connector issues, so far no luck. The shielded pair of wires run from passenger side fire wall, across front valve cover, past the alternator down to the sensor. Removed both of the valve covers to double check those cam cradle seals. Both banks are intact and in placed properly. Going to reinstall valve covers and get out a bigger scope to get a good waveform of cams and crank. Also going to see if crank sensor can be snuck out to get a good look at wheel with borescope. I attached some code criteria as well 

Vehicle has 168k!

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Erik Diagnostician
Florida
Erik
 

Check to make sure the cam cradle seals are there. Mickey Mouse ears looking seal and a rear circular seal as well. Either missing or double gasket does weird things. Also a CAM Crank to make sure but just the valve covers Gaskets and that’s it? Also check the sensors and wiring to make sure he didn’t smash one or more.

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Geoff Diagnostician
Hawaii
Geoff
 

Get out the bore scope, spin the engine by hand while inspecting the CKP trigger wheel. Something may be stuck down in there. Or a piece of something is clogging an oil passage, now, and although that should set a VVT type DTC, mechanical issues cause ECM logic errors, and DTC set criteria gets lost.

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Agree
Paul Mechanic
Illinois
Paul
 

The waveform seems to have inconsistencies. The fourth top tooth after your cursor looks low(almost as low as sync tooth) as does it's opposite which is three from missing tooth, yet looks normal on others 4/3 after missing tooth(sync) not sure if that would even cause code. Perhaps sensor is losing sensitivity as is inductive in nature? Since you had valve covers off,I assume coils had to be…

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Robert Technician
Michigan
Robert
 

I agree with Paul if no connectors are filled with oil and it doesn't set while cranking …GR-FE Idling DOHC DVVT

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Erik Diagnostician
Florida
Erik
 

You can sneak it out. Its a pain with the compressor and the bracket on the back but I have done the job in 30 min taking the crank sensor out. You may need to low the subframe a little bit and lube spray the studs depending on corrosion if any.

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Nollan Instructor
Washington
Nollan
 

Scope it at the pcm while tugging on the crank sensor wiring. I'll bet the crank sensor wiring was stretched when the front valve cover came off

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