Wells Nissan P0507 Relearn Cam and Crank Sensor location and Testing
http://www.wellsve.com/ This video will locate and test the cam and crank sensor on a 2004 Nissan. It will also demonstrate an alternative method to relearn the idle air control. When a P0507 or a high idle occurs after a throttle body clean, the TSB requires the use of the factory (Consultant II) scan tool to reset idle air control. The reset can also be performed by following the steps in this video, without a scan tool.
The information presented in this program is based on a specific diagnostic case and might not directly apply to the vehicle you are repairing. We do not represent or warrant that the information presented is complete or error free. Please take all safety precautions. We disclaim any and all liability for losses, injuries or damages in connection with your repair.
2003 Nissan Altima S - Camshaft & Crankshaft Position Sensors
2003 Nissan Altima S 2.5L W/Automatic Transmission
INTERMITTENT NO-STARTS & ROUGH-STARTS WITH NO DTCs SET.
A LOCAL AUTOSHOP HAD REPLACED ONLY THE CAMSHAFT POSITION SENSOR, MADE SURE
NO DTCs PRESENT AND OPS CHECK GOOD.
HOWEVER, THE PROBLEM RETURNED.
NOW, THE SAME AUTOSHOP BELIEVES THAT THE FAULT IS WITH THE TRANSMISSION
FLEX PLATE, WHICH MAY HAVE DAMAGED THE CRANKSHAFT POSITION SENSOR AS WELL,
ACCORDING TO HIM.
ESTIMATE IS AT ~$750.
The mechanic didn't try to replace the Crankshaft sensor alone, he went
straight for the Tranny drop. I figured go with the cheap fix first. If it
comes back, then we will look into the Flex Plate.
I replaced the recently replaced Camshaft sensor & the never been replaced
Crankshaft sensor. So far, so good.
Replacing the Camshaft sensor is a 2-minute job.
The Crankshaft sensor will likely take 30 times as long.
It seems like the Old Crankshaft Position sensor I removed was a bit high
on a resistance check, when compared to brand new sensors. With too high a
resistance value, the sensor may not make use of the full voltage it is
receiving and/or it may not return the required amount of voltage to the
Powertrain Control Module (PCM), which will lead to irregular engine
operation or a no-start condition.
Both Camshaft & Crankshaft sensors are the same part number. The 3rd
version of the sensor is encased in metal, not plastic.
The OEM part number is 23731-6N21A ($44 us)
The old part numbers were encased in plastic. These part numbers should not
be used: 23731-8J005 & 23731-8J006
FOR ONLINE PART PURCHASE:
"DIGITALDXING" PROVIDED THE LINKS LISTED BELOW AND POSTED SOME PICTURES
(2003 NISSAN ALTIMA 2.5L)
"PAUL" POSTED HIS PICUTRES HERE (2002 NISSAN ALTIMA 2.5L)
"DENTNSHELL" POSTED HIS FIX HERE (2005 NISSAN ALTIMA 2.5L)
"MULEMAN" POSTED A GREAT STEP-BY-STEP WRITE UP WITH PICTURES HERE (2006
NISSAN ALTIMA 2.5L)
Thanks a bunch, muleman.
...ACTUALLY, THAT WHOLE THREAD AT NISSANCLUB.COM IS A GOOD READ.
Best Answer - Chosen by Voters
Nissan recalls that problem to reprogram the ECU. What happens the crank
sensor electrical terminals seep oil into the crank sensors plug. The new
metal crank sensors correct this problem. Location of this sensor on the
back of the motor is difficult to change and you need gorrilia finger grip
to depress the connector green lock and remove the sensor. Depending on
your cars Vin# Recall Campaign # R0712 NHTSA# 07V-527. Hopefully your
factory warranty replaces the sensor no charge 5yr/60,000 mile. The
campaign only covers the ECM reprogram. The ECM reprogram makes both
sensors act as one so either will allow the car to start. Stalling and not
starting is a safety risk.
Nissan Master Technician (John Paul)
For some information on related DTC faults:
How to diag 02-06 Nissan SES light
**NOTE** This process can be tedious and nerve racking because it may not
work up to 20 times or more, if you're not familiar with the timing.
Nissan's time windows for each step are very narrow, so if you're not
getting it at first, perhaps you need to do it faster or slower and you'll eventually do it
This video is a tutorial on how to diagnose why your 02-06 Nissan is
displaying the SES (service engine soon) light by using your cars built in
OBD (on board diagnostic) system. I have a 2003 Nissan Altima 2.5S. It has
been confirmed to also work on an 06 Sentra SpecV, 09 Infiniti G37, 08
Patrol 4800 VTC, 03 Sentra GXE 1.8L, 11 Cube, 06 G35, as well as a 350z.
Check out the thread over at nissanclub.com:
1998 Nissan Maxima with nasty sounding rattle
EDIT: I still don't know exactly what the problem was but the end result
was I had a local shop install a newer used engine (VQ30DE) which wasn't
too expensive to have done. Good luck to anyone else having a similar
Other than this rattle my car has been in fine working order. I have done
all of the preventative maintenance. It has 180,000 miles and started
making this rattle sound only a few minutes after I drove over a small flat
object with my tire. My car has a timing chain that uses a tensioner to
keep it from having too much slack but those tensioners can fail from time
to time. Before just replacing parts here and there I would like to have
some other people's perspectives on what may be causing this noise. Any
suggestions would be greatly appreciated.
Also, it spit out two codes:
0608 - Cylinder No. 1 misfires (many possible causes listed but I wouldn't
be surprised if one of my injectors went bad as 1 or more of them have been
making more and more noise over time).
0304 - Knock Sensor; an excessively low or high voltage from knock sensor
is entered to ECM; possible causes include short in Harness or Connectors
or a bad Knock Sensor.
Possible causes I can think of:
-Bad rod bearing
-Foreign object in valve train
-Bad timing chain tensioner
-Bad sensor which could be the camshaft position sensor, the crankshaft
position sensor, the knock sensor, or an oxygen sensor.
-Bad fuel injector
How To Diagnose A Check Engine Light : Code P0340 Cam Position Sensor
We discuss a P0340 camshaft position sensor circuit malfunction code. In
some cases the sensor could be faulty and in others it could be in the
engine timing components and/or pcm. Take note that you don't have to have
an expensive scanner like in the video to perform this check. A digital
multimeter that will read frequency will do the same thing.
The automobile consist of:
• Fuel System: Purpose is to deliver fuel to the engine. It consists of
the fuel tank, pump, gauge/sensor, filter, pressure regulator and
• Air Intake System: Purpose is to clean and direct outside air into the
engine. It consist of air filter, ducts, air plenum and intake manifold.
• Exhaust System: Purpose is to
direct Exhaust gasses out of
combustion out of engine. It consists of the Exhaust manifold, converters, pipes and
• Cooling System: Purpose is to remove excess heat from the engine. It
consists of water pump, hoses, radiator, thermostat, cooling fan and
coolant recovery tank. Also the oil system serves as a cooling system as
well as a lubricating system. It consist of oil pump, pan, filter and
1. Clutch: Purpose is to connect the engine and transmission together. It
consists of clutch drive disc, driven disc, release bearing, clutch fork,
cable, slave cylinder, master cylinder. There are three types of clutch
systems: mechanical, cable and hydraulic.
2. Transmission: Purpose is to match engine speed to road speed. Two types
used are manual or automatic. These consist of gears, linkages, cables and
converters for automatics. A manual is connected to the clutch by a
flywheel and automatic by a flexplate.
3. Driveshaft: Purpose is to connect the transmission to the rear axle. It
consists of a slip yoke, shaft and universal joints.
4. Rear axle differential: Purpose is to change the angle of motion from
engine to the wheels. It also divides torque between the wheels. It
consists of a ring and pinion gear, carrier, bearings, crush sleeve and
5. Wheels/Tires: Purpose is to provide traction to the road as well as
carry the weight of the vehicle.
Vehicle Control Systems:
1. Brakes: Purpose is to slow and stop the vehicle. It consists of master
cylinder, brake Booster (vacuum or
hydraulic), calipers, drums, pads and rotors.
2. Steering: Purpose is to direct vehicle in the required direction.
Consists of steering gear (rack & pinion), steering wheel, column,
inner/outer tie rods, pump, reservoir, hoses and pipes.
3. Suspension: Purpose is to provide stability and handling while also
providing comfort to the ride. Consists of shocks, struts, sway bars, end
links, springs, trailing arms and bushings.
1: Heating Ventilation Air Conditioning (HVAC): Heats and cools interior
air to passenger comfort. Also circulates outside and inside air.
• Air Conditioning: Consist of condenser, compressor, accumulator
(receiver/dryer) orifice, expansion valve, hoses, evaporator, controls,
actuators and modules.
• Heating: Consists of heater core, valves, hoses and switches.
1. Power Generation: Creates electrical power to run all the electrical
systems. Consists of the alternator.
2. Power storage: Stores unused power to start the car and supply voltage
to the alternator to create more electricity.
• Both systems consist of wiring, harnesses, fuse, relays and modules.
Mode 6 misfire diagnostics on a 2002 Expedition by Wells
http://www.wellsve.com/ Pinning down which cylinder is misfiring when the
check engine light has not illuminated can be a serious challenge,
especially when the problem only occurs under a heavy load. This video
shows you how to use mode 6 as a diagnostic tool to pick out which cylinder
is misfiring on this Ford Expedition.
How Crankshaft Position Sensors Work :: EFI Explained by Matt @ M-Tech Automotive
In this video we cover how crank position sensors work as well as how to
test them and their use in engine management and fuel injection systems...
Find out more about M-Tech as well as pictures of current projects in
progress on our Facebook page.
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How-to: diagnose a P0320 (crankshaft position sensor circuit failure)
This si a how-to video on the correct diagnois of a P0320 as applied to
jeep/dodge/Chrysler cars and trucks. this was done on a 1997 jeep wrangler
2.5l 4 cylinder engine. you car or truck may not be exactly the same but
the theories and principles are the same for the overall diagnosis. if you
have any questions please feel free to email me firstname.lastname@example.org,
tweet at me @thejeepdoctor, find me on facebood
facebook.com/itsthejeepdoctors and please check out my other videos.