Question about 2005 Nissan Altima

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Have crankshaft sensor code and speed sensor code I changed the crank sensor and voided the codes and they came back within one day car also seems to loose power for a moment at higher speeds and today at low speeds it shut off twice

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Rarely will a part replacement solve a code
more often than not it is wiring related
therefore you will need a DVOM so that you can measure the voltage at the CKP ad compare that to the voltage getting to the computer

then you will need a dealer scan tool or something close like the cheap one I use in my shop, which costs $2000 to verify the CKP signal that the computer "assumes" it sees

then and only then can you guess what part needs to be replaced or what needs to be repaired

also... things like a failing fuel pump, restricted exhaust and failing engine can also set a CKP code

Posted on Sep 17, 2010

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Posted on Jan 02, 2017

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2000 Honda 1.6 showing P1336 code, what is the location of this code?


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If a trouble code on a 2000 vw shows speed sensor and the test comes out good what is the problem


engine speed sensor could be faulty.engine speed sensor provides the ECM with a crankshaft position signal.the ECM uses the signal to determine a crankshaft reference point top dead center and calculate engine speed. engine speed sensor like the crankshaft position sensor.if sensor faulty fuel system wont work. a bad engine coolant temperature sensor will cause engine shut off when hot.

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Could po320 be drive shaft speed sensor


code p 0320 refers to crankshaft position (CKP) sensor /engine speed (RPM) sensor---circuit malfunction====causes --wiring--CKP/RPM sensor ---ECM check the wiring to the crank position sensor
replace the crankshaft position sensor

Apr 16, 2017 | 2004 Jeep Grand Cherokee

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I changed the harmonnic ballancer and the sensor and got code p0336 didnt have this code untill I had to change harmonic.


P0336 Crankshaft Position Sensor A Circuit Range/Performance.

Potential causes of a P0336 code include:

  • Bad crank sensor
  • Broken reluctor ring (missing teeth, debris lodged in ring)
  • Reluctor ring dislodged/stripped from it's stationary location
  • Wiring harness chafing causing short
  • Wiring open in CKP circuit, good-day ! CKP=crankshaft position sensor. The Crankshaft position sensor also known as the crank position sensor is an electronic device used in an engine to record the rate at which the crankshaft is spinning. This information is used by the Electronic Control Module(ECM) to control ignition and fuel injection. The sensor system consists of a rotating part, typically a disc, as well as a static part, the actual sensor. good-day !


Apr 03, 2012 | 2000 Pontiac Grand Am GT

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Code p2089 dodge sprinter 2007


DTC P2089 A - Camshaft Pos Actuator Ctrl Circ Hi Bank1
On this code the cam or crank sensor is normally the culprit. I would replace the crankshaft position sensor. There is anothe possible sensor that can cause this to happen vehicle speed sensor and engine coolant temp sensor. The way it works is The ECM receives signals such as crankshaft position, camshaft position, engine speed, and engine coolant temperature. Then, the ECM sends ON/OFF pulse duty signals to the intake valve timing control solenoid valve depending on driving status. This makes it possible to control the shut/open timing of the intake valve to increase engine torque in low/mid speed range and output in high-speed range. But the most common problem is the cam or crank sensor Start with the crankshaft sensor and then camshaft sensor.

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Feb 03, 2012 | 2007 Dodge Sprinter

1 Answer

Speed sensor


Hi Leon:
DTC P0725 - ENGINE SPEED SENSOR CIRCUIT
When Monitored: Continuously after a ignition key is turned from the OFF to RUN position and/or key is turned from the CRANK to the RUN position.

Set Condition: The code is set when the engine speed sensed by the Transmission Control Module (TCM) is different than the engine speed reported by the Powertrain Control Module (PCM) over the Communication Buss.

POSSIBLE CAUSES
- LOW BATTERY VOLTAGE
- BAD CONNECTIONS AT VARIOUS CONNECTORS
- CRANK POSITION SENSOR SIGNAL OPEN
- CRANKSHAFT POSITION SENSOR GROUND CIRCUIT OPEN
- TCM CRANK POSITION SENSOR MONITORING DEFECTIVE

The Crankshaft Position Sensor (CKP) is mounted to the transmission bellhousing at the left/rear side of the engine block. Engine speed and crankshaft position are provided through the crankshaft position sensor. The sensor generates pulses that are the input sent to the powertrain control module (PCM). The PCM interprets the sensor input to determine the crankshaft position. The PCM then uses this position, along with other inputs, to determine injector sequence and ignition timing. The sensor is a Hall effect device combined with an internal magnet. It is also sensitive to steel within a certain distance from it.

On 4.0L 6-cylinder engines, the flywheel/drive plate has 3 sets of four notches at its outer edge. The notches cause a pulse to be generated when they pass under the sensor. The pulses are the input to the PCM. For each engine revolution there are 3 sets of four pulses generated.

Additionally,
The speed control system is electronically controlled and vacuum operated. Electronic control of the speed control system is integrated into the Powertrain Control Module (PCM). The controls consist of two steering wheel mounted switches. The switches are labeled: ON/OFF, RES/ACCEL, SET, COAST, and CANCEL.
The system is designed to operate at speeds above 30 mph (50 km/h). When speed control is selected by depressing the ON switch, the PCM allows a set speed to be stored in PCM RAM for speed control. To store a set speed, depress the SET switch while the vehicle is moving at a speed between 35 and 85 mph. In order for the speed control to engage, the brakes cannot be applied, nor can the gear selector be indicating the transmission is in Park or Neutral.

Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

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Dec 01, 2011 | 2000 Jeep Grand Cherokee

2 Answers

Van will not start code p0725 what to do


Without knowing make or model Po725 is a Chrysler code for Engine Speed Sensor Circuit
Possible Causes- - Open or shorted CKP sensor circuit condition
- Poor CKP sensor electrical connection
- Check communication error between the ECM and TCM
- Failed CKP Sensor
When is the code detected- The P0725 Codes is triggered when TCM does not receive the engine speed signal from ECM. Chrysler description- The Engine Control Module (ECM) monitors the engine speed through the Crankshaft Position (CKP) sensor with the engine running, and send signal to the Transmission Control Module (TCM

May 09, 2011 | Chrysler Town & Country Cars & Trucks

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02' Nissan Altima, car jerking, turns off at light, but turns right back on. Engine light on, code from autozone P0335 crankshaft position sensor. P0725 Engine speed signal circuit. The start up, days it...


If it has a code for loosing the crankshaft position sensor signal, I would certainly start looking at that before venturing into the fuel system. Cam and Crank sensors are a common failure item for Nissans of that era. Nissan actually redesigned the sensor and i think they performed a recall on some vehicles. They are fairly inexpensive and easy to replace. I believe they run about $40 each. Because most people don't have access to a powerful scanner or a digital storage oscilloscope to verify the failure I recommend replacing the cam and crank sensors at the same time.

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1 Answer

Crankshaft sensor malfunction and engine speed sensor malfuntion


the speed sensor is on the transmission and controls the cruise control , ratio changes if auto
they are available from dealer spares or wreckers/junk yards or possibly e-bay

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1 Answer

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The engine speed signal code is generated from the crank sensor. The crank sensor is located on the back side of the engine block. See image.

Thanks Jay!dd6b033.jpg

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