Question about 2000 Pontiac Grand Am GT

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No signal from the input speed sensor

It's intermittent, causing the car to slam into gear when moved from N to D, and very hard shifting through the first 4 gears, ODB reader gave me this code for the input sensor, any ideas on how to easily fix this?

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  • niskukenny Sep 11, 2009

    That is the output speed sensor, the code i belive was 717, but it's the input speed sensor insiide the transaxle, I have checked the connector on the trans, traced the harness to the firewall with no flaws and checked the connections on the PCM with no luck, i think its time for a trip to the bottom of the lake for this car...

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Yes you didn't give me code number, with out it my best guess is broken wire at vss sensor near rt drive axle there is a purple wire with a white stripe & a light geen wire with black stripe both in a black conduit pull out & pull on wire gently if they come apart you found it resolder or get new connector at GM dealer

Posted on Sep 07, 2009

  • 1Dumbshit Sep 12, 2009

    Oops unplug trans connector get ohm meter & measure resistence between terminals S and V spec is 615-835 ohms if ok I would suspect wiring at trans pull on wires at connector individualy if one brakes you found it if you believe all wiring is good it needs a pcm

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04 f150 heritage speedo moves but not over 10 mph and trans won't shift gears. i changed all sensors,traced all wires.


taking your vehicle to a qualified reair shop to have it diagnosed would be a good thing to do . You could not have traced all wires ! Because i'm sure you haven't any idea how this works . An a factory scan tool is a must to diagnose this .Do you know what ford SCP data network is ?
Speedometer
The instrument cluster receives the vehicle speed signal from the powertrain control module (PCM) over the standard corporate protocol (SCP) network and displays it on the speedometer gauge. If the instrument cluster receives no vehicle speed signal after one second, the speedometer defaults to 0.0 km/h (0.0 mph).

Vehicle Speed Sensor
The vehicle speed sensor (VSS) (Figure 52) is a variable reluctance or Hall-effect sensor that generates a waveform with a frequency that is proportional to the speed of the vehicle. If the vehicle is moving at a relatively low velocity, the sensor produces a signal with a low frequency. As the vehicle velocity increases, the sensor generates a signal with a higher frequency. The PCM uses the frequency signal generated by the VSS (and other inputs) to control such parameters as fuel injection, ignition control, transmission/transaxle shift scheduling and torque converter clutch scheduling.

P0500 - Vehicle Speed Sensor (VSS) Malfunction Indicates the powertrain control module (PCM) detected an error in the vehicle speed information. Vehicle speed data is received from either the vehicle speed sensor (VSS), the transfer case speed sensor (TCSS) or the anti-lock brake system (ABS) control module. If the engine RPM is above the torque converter stall speed (automatic transmission) and the engine load is high, it can be inferred that the vehicle must be moving. If there is insufficient vehicle speed data input, a malfunction is indicated and a DTC is set. On most vehicle applications the malfunction indicator lamp (MIL) is triggered when this DTC is set.
  • Open in the VSS+/VSS- harness circuit.
  • Open in the TCSS signal or the TCSS signal return harness circuit.
  • Short to GND in the VSS harness circuit.
  • Short to GND in the TCSS harness circuit.
  • Short to PWR in the VSS harness circuit.
  • Short to PWR in the TCSS harness circuit.
  • Damaged drive mechanism for VSS or TCSS.
  • Damaged VSS or TCSS.
  • Damaged wheel speed sensors.
  • Damaged wheel speed sensor harness circuits.
  • Damage in the module(s) connected to the VSC/VSS circuit.
  • Open or short in the vehicle speed circuit VSS signal between the ABS VSS signal output and the VSS signal inputs to the PCM and other modules (Excursion and F-Super Duty).
Monitor the VSS PID while driving vehicle. This DTC is set when the PCM detects a sudden loss of vehicle speed signal over a period of time. If vehicle speed data is lost, check the source of where the vehicle speed input originates from: VSS, TCSS or ABS. Note: On some MSOF applications, VSS and TCSS PID can be monitor. However if no TCSS PID is available and VSS PID is zero, TCSS circuitry frequency must be checked for loss of sensor signal. If another vehicle electronic module has generated the P0500 and the vehicle does not receive its vehicle speed input from one of the above mention sources (VSS, TCSS or ABS). Check the PCM for Output Shaft Speed Sensor (OSS) DTCs. On OSS applications the PCM uses the OSS to calculated the vehicle speed. If no OSS DTCs are found check for correct PCM configuration. Check PCM configuration for correct tire size and axle ratio. P0501 - Vehicle Speed Sensor (VSS) Range/Performance Indicates the powertrain control module (PCM) detected an error in the vehicle speed information. This DTC is set the same way as P0500, however the malfunction indicator lamp (MIL) is not triggered.
  • Refer to possible causes for P0500.
Refer to Diagnostic Aids for P0500. P0503 - Vehicle Speed Sensor (VSS) Intermittent Indicates poor or noisy VSS performance. Vehicle speed data is received from either the vehicle speed sensor (VSS), the transfer case speed sensor (TCSS), or the anti-lock brake system (ABS) control module.
  • Noisy VSS/TCSS input signal from the radio frequency interference / electro-magnetic interference (RFI/EMI) external sources, such as ignition components or the charging circuit.
  • Damaged VSS or driven gears.
  • Damaged TCSS.
  • Damaged wiring harness or connectors.
  • Malfunction in the module(s) or circuit connected to the VSS/TCSS circuit.
  • After market add-on.
Monitor the VSS PID while driving the vehicle. Check for intermittent vehicle speed indication. Verify the ignition and charging system are functioning correctly.

Mar 25, 2017 | Cars & Trucks

1 Answer

Location of trans speed sensor 3 pin location 2004 solar v6 automatic p0500 speed sensor trouble code


no what matters is if the pulses are good.
and the transmission not slipping.
the TCM is not genious level yet.

are you asking what P0500 means.
or want us to tell you all things stated in fSM for this code.
what? guessing you can do .
ever heard of alldata.com (DIY)
ever read that page on 500s?
i guess not.
3.3L v6 ?
quote:
Trouble Code Conditions: P0500
VEHICLE SPEED SENSOR "A"
The ECM detects following conditions simultaneously for 2 secnonds (1 trip detection logic):
No SPD (speed sensor) signal while ECM detects NC (trans­mission counter gear) signal is more than 300 RPM Park/Neutral position switch is OFF (When shift lever is in other than P and N positions) Possible Causes:
  • Open or short in speed sensor circuit
  • Speed sensor
  • Combination meter
  • ECM
  • Skid control ECU
im trying to decode that too, the sensors
are called, C3 counter gear sensor, and Turbin T3 sensor
but the book keeps changing names in the book.

i think it means, counter gear shows correct RPM
but the turbine gear sensor T3 is dead.
while in gear. is too hard for them to say. so i said it.
and my guess, moving,
after all transmission slip moving
in fact i can scan your car and prove that
i scan it in park, then indrive, no moving
got 500s, or are 500 happening flogging engine.

but the ECU signal is either dead for turbine sensor or is way too slow. see incongruity from 300+ rpm on counter gear.

500 means dead, not intermittant.
i looked at all codes for turbine.

so my best guess (no real fsm only alldata)
is Turbine is the clutch sensor. (input rpm to trans-clutch)
and counter gear is tail shaft sensor.? (output speed)
so the front clutch sensor is dead
or being grounded out, or is not connected, (rusty conns?)

Most FSM made do a poor job, at showing possible bad parts.

here is better
  1. the sensor is weak or dead
  2. the sensor connections are bad.
  3. the sensor, signals do not arrive at the PCM /TCM, due to bad wires, or anything on that line shorting that line out.
  4. better (yes?, this is electronics) no a parts swap game.

if the car drives ok then the trans does not slip.
the TCM sees both ends and can detect, bad sensors or gross slip.
i think it means bad sensor. in this case only.

what does this mean?
  1. having difficulty locating it
can buy one, find one, can't insert it, or?

Feb 13, 2015 | 2004 Toyota Solara

1 Answer

Transmission shifts hard


You don't give me much information to work with. However, 1st, look at the engine mounts. You may have a broken mount. This will make it feel like the transmission is shifting hard. Other than that, there is only a few things that will cause this. The speed sensor tells the computer when to shift the shift solenoids. It may not be "seeing" a quality signal. If this is the case, the speedometer will be bouncing too. Last idea is that it is skipping a gear. Starts in 1st, should go to 2nd at about 10 MPH. 3rd at 25 to 30 MPH. And, if you have a Overdrive transmission, it should go into overdrive at around 45 to 55 MPH. If it is skipping 2nd, it will engage 3rd at a high engine speed, and will feel like a sudden slam into gear. If this is true, your transmission needs some work. Hope this all helps. Good Luck.

Jun 19, 2014 | 2002 Pontiac Sunfire

1 Answer

I need help asap 2003 Expedition code p0171 and code p0712 i have and idea of the 1st code but whats the secound code i really need help i dont want to take it to a shop where there going to charge me alot...


P0700 Transmission Control System

P0701 Transmission Control System Range/Performance

P0702 Transmission Control System -Electrical

P0703 Torque Converter/Brake Switch B Circuit

P0704 Clutch Pedal Position Switch -Circuit Malfunction

P0705 Transmission Range Sensor/Switch Circuit Malfunction (PRNDL Input)

P0706 Transmission Range Sensor/Switch Circuit Range/Performance

P0707 Transmission Range Sensor/Switch Circuit Low Input

P0708 Transmission Range Sensor/Switch Circuit High Input

P0709 Transmission Range Sensor/Switch Circuit intermittent

P0710 Transmission Fluid Temperature Sensor Circuit

P0711 Transmission Fluid Temperature Sensor Circuit Range/Performance

P0712 Transmission Fluid Temperature Sensor Circuit Low Input

P0713 Transmission Fluid Temperature Sensor Circuit High Input

P0714 Transmission Fluid Temperature Sensor Circuit Intermittent

P0715 Input/Turbine Speed Sensor Circuit

P0716 input/Turbine Speed Sensor Circuit Range/Performance

P0717 Input/Turbine Speed Sensor Circuit No Signal

P0718 Input/Turbine Speed Sensor Circuit Intermittent

P0719 Torque Converter/Brake Switch B Circuit Low

P0720 Output Shaft Speed Sensor Circuit

P0721 Output Shaft Speed Sensor Circuit Range/Performance

P0722 Output Shaft Speed Sensor Circuit No Signal

P0723 Output Shaft Speed Sensor Circuit Intermittent

P0724 Torque Converter/Brake Switch B Circuit High

P0725 Engine RPM Input Circuit

P0726 Engine RPM Input Circuit Range/Performance

P0727 Engine RPM Input Circuit No Signal

P0728 Engine RPM Input Circuit Intermittent

P0729 Gear 6 Incorrect Ratio

P0730 Incorrect Gear Ratio

P0731 Gear 1 Incorrect Ratio

P0732 Gear 2 Incorrect Ratio

P0733 Gear 3 Incorrect Ratio

P0734 Gear 4 Incorrect Ratio

P0735 Gear 5 Incorrect Ratio

P0736 Reverse Incorrect Ratio

P0737 TCM Engine Speed Output Circuit

P0738 TCM Engine Speed Output Circuit Low

P0739 TCM Engine Speed Output Circuit High

P0740 Torque Converter Clutch Solenoid Circuit

P0741 Torque Converter Clutch Solenoid Circuit Performance or Stuck Off

P0742 Torque Converter Clutch Solenoid Circuit Stuck On
P0743 Torque Converter Clutch Solenoid Circuit Electrical
Now i dont know a lot about automatics especially modern ones with all this fancy electronics thats used nowdays but i think its a fault with the temperature sensor for the gearbox.But where its located and what it looks like i have no idea it could even be mounted inside the gearbox .Sorry not a very good answer from a mechanic but?? very few of our europeon cars come with auto transmission .Evan when i do know whats wrong i cannot buy the parts for the gearbox as only re-con boxes supplied by the dealer so best advice is to try a specialist in auto box repairs only .PS some of my best students when i used to teach mechanics many moons ago were the girls so no excuses like iam only a girl please

Apr 22, 2013 | Cars & Trucks

3 Answers

I am getting a p0717 code, when i am driving and have to stop the car if i try to take off on drive it wont move, i have to shift it to a lower gear for it to move.


P0717 - Input/Turbine Speed Sensor Circuit No Signal.

P0717 code means that the computer isn't getting any signal from the sensor. Either the sensor is dead or there's a circuit issue (bad wiring, etc).

The computer wants to know if the transmission is working properly. So it reads the speed of the input shaft and compares it to the speed of the output shaft. It knows which gear you're in because it commanded the transmission to shift into that gear. So, with the input speed, the gear selection, and the output speed, the computer can calculate how efficiently the transmission is working. If the speed is off, it knows that something is slipping inside the transmission. It can then try to boost the fluid pressure to compensate. If that doesn't work, it sets a different trouble code.

Hope helps (remember to rate and comment this answer).

Dec 21, 2010 | 2003 Suzuki Aerio

1 Answer

My c6 in bronco starts off in 2nd gear performs ok every other way.


P0700 Transm.Contr.System Malfunction 17084
P0702 Transm.Contr.System Electrical 17086
P0703 Torque Converter/Brake Switch B Circ Malfunction 17087
P0705 Transm.Range Sensor Circ.(PRNDL Inp.) Malfunction 17089
P0706 Transm.Range Sensor Circ Range/Performance 17090
P0707 Transm.Range Sensor Circ Low Input 17091
P0708 Transm.Range Sensor Circ High Input 17092
P0710 Transm.Fluid Temp.Sensor Circ. Malfunction 17094
P0711 Transm.Fluid Temp.Sensor Circ. Range/Performance 17095
P0712 Transm.Fluid Temp.Sensor Circ. Low Input 17096
P0713 Transm.Fluid Temp.Sensor Circ. High Input 17097
P0715 Input Turbine/Speed Sensor Circ. Malfunction 17099
P0716 Input Turbine/Speed Sensor Circ. Range/Performance 17100
P0717 Input Turbine/Speed Sensor Circ. No Signal 17101
P0721 Output Speed Sensor Circ Range/Performance 17105
P0722 Output Speed Sensor Circ No Signal 17106
P0725 Engine Speed Inp.Circ. Malfunction 17109
P0726 Engine Speed Inp.Circ. Range/Performance 17110
P0727 Engine Speed Inp.Circ. No Signal 17111
P0730 Gear Incorrect Ratio 17114
P0731 Gear 1 Incorrect Ratio 17115
P0732 Gear 2 Incorrect Ratio 17116
P0733 Gear 3 Incorrect Ratio 17117
P0734 Gear 4 Incorrect Ratio 17118
P0735 Gear 5 Incorrect Ratio 17119
P0740 Torque Converter Clutch Circ Malfunction 17124
P0741 Torque Converter Clutch Circ Performance or Stuck Off 17125
P0748 Pressure Contr.Solenoid Electrical 17132
P0750 Shift Solenoid A malfunction 17134
P0751 Shift Solenoid A Performance or Stuck Off 17135
P0752 Shift Solenoid A Stuck On 17136
P0753 Shift Solenoid A Electrical 17137
P0756 Shift Solenoid B Performance or Stuck Off 17140
P0757 Shift Solenoid B Stuck On 17141
P0758 Shift Solenoid B Electrical 17142
P0761 Shift Solenoid C Performance or Stuck Off 17145
P0762 Shift Solenoid C Stuck On 17146
P0763 Shift Solenoid C Electrical 17147
P0768 Shift Solenoid D Electrical 17152
P0773 Shift Solenoid E Electrical 17157
P0790 Normal/Performance Switch Circ Malfunction 17174

Dec 20, 2010 | 1985 Ford Bronco

1 Answer

Hi sir, i want some details related to the gear


P0700 Transm.Contr.System Malfunction 17084
P0702 Transm.Contr.System Electrical 17086
P0703 Torque Converter/Brake Switch B Circ Malfunction 17087
P0705 Transm.Range Sensor Circ.(PRNDL Inp.) Malfunction 17089
P0706 Transm.Range Sensor Circ Range/Performance 17090
P0707 Transm.Range Sensor Circ Low Input 17091
P0708 Transm.Range Sensor Circ High Input 17092
P0710 Transm.Fluid Temp.Sensor Circ. Malfunction 17094
P0711 Transm.Fluid Temp.Sensor Circ. Range/Performance 17095
P0712 Transm.Fluid Temp.Sensor Circ. Low Input 17096
P0713 Transm.Fluid Temp.Sensor Circ. High Input 17097
P0715 Input Turbine/Speed Sensor Circ. Malfunction 17099
P0716 Input Turbine/Speed Sensor Circ. Range/Performance 17100
P0717 Input Turbine/Speed Sensor Circ. No Signal 17101
P0721 Output Speed Sensor Circ Range/Performance 17105
P0722 Output Speed Sensor Circ No Signal 17106
P0725 Engine Speed Inp.Circ. Malfunction 17109
P0726 Engine Speed Inp.Circ. Range/Performance 17110
P0727 Engine Speed Inp.Circ. No Signal 17111
P0730 Gear Incorrect Ratio 17114
P0731 Gear 1 Incorrect Ratio 17115
P0732 Gear 2 Incorrect Ratio 17116
P0733 Gear 3 Incorrect Ratio 17117
P0734 Gear 4 Incorrect Ratio 17118
P0735 Gear 5 Incorrect Ratio 17119
P0740 Torque Converter Clutch Circ Malfunction 17124
P0741 Torque Converter Clutch Circ Performance or Stuck Off 17125
P0748 Pressure Contr.Solenoid Electrical 17132
P0750 Shift Solenoid A malfunction 17134
P0751 Shift Solenoid A Performance or Stuck Off 17135
P0752 Shift Solenoid A Stuck On 17136
P0753 Shift Solenoid A Electrical 17137
P0756 Shift Solenoid B Performance or Stuck Off 17140
P0757 Shift Solenoid B Stuck On 17141
P0758 Shift Solenoid B Electrical 17142
P0761 Shift Solenoid C Performance or Stuck Off 17145
P0762 Shift Solenoid C Stuck On 17146
P0763 Shift Solenoid C Electrical 17147
P0768 Shift Solenoid D Electrical 17152
P0773 Shift Solenoid E Electrical 17157
P0790 Normal/Performance Switch Circ Malfunction 17174

Dec 20, 2010 | 2006 Renault Fuego

1 Answer

2000 toyota echo code po1725


dak408_132.gif

See above chart
CIRCUIT DESCRIPTION
This sensor detects the rotation speed of the input turbine. By comparing the input turbine speed signal (NT) and the counter gear speed sensor signal (NC), the ECM detects the shift timing of the gears and appropriately controls the engine torque and hydraulic pressure in response to various conditions, thus performing smooth gear shifting.

Jun 19, 2010 | 2000 Toyota ECHO

2 Answers

Shifting gears


the speed sensor is for Overdrive only, it does not shift the gears it sends the signal to the transmission control module that in turn signals the overdrive shift solenoid to engage/shift into OD.

May 11, 2009 | 1997 Dodge Grand Caravan

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