Questions tagged [sensor]

An electronic device that monitors a particular parameter and provides data to be consumed by other systems to adjust and/or monitor vehicle systems. Examples include: mass air flow (MAF) sensors, oil pressure switches and transducers, ABS wheel speed sensors, outside air temperature (OAT) sensors.

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29 views

Do I need to replace the fuel pressure sensor of a 2007 Volvo XC90 V8 AWD?

I have a 2007 Volvo XC90 V8 AWD. The dealership told me that the check engine light came on intermittently and the reason was the fuel pressure sensor is faulty. It costs $525 to replace it. Is this ...
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58 views

Emergency brake light is on and stays on

The van (iveco daily, sorry don't know the type anymore) of my father has a brake warning light on. Once I removed te cover I saw it was a single wire that was disconnected from the switch. I thought ...
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22 views

Honda Civic 2018 blind spot information system warning

My Honda Civic 2018 had an accident and it was in a repair shop for a while. After the repair, there was a warning on the dashboard with below icon. When I asked about this from the mechanic, he took ...
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54 views

What does OBDII fault code P0120 really mean?

What does OBDII fault code P0120 mean? The device said: "TPS/Pedal Position Sensor A Circuit Malfunction". The problem is that TPS stands for: "Throttle-body Position Sensor, which sits ...
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24 views

2014 Chevy Malibu - Code P055B

I keep getting a P055B code, but I have changed out the sensor twice. The mechanic cleared the code but it keeps returning. Any suggestions?
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55 views

How does a OBD II misfire detection monitor know “exactly” which cylinder is misfiring?

I do know that magnetic pick-up coils are used to detect crankshaft position and these sensors are used to tell which cylinder is misfiring. These magnetic pick-coils do not produce a smooth & ...
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55 views

Fixing a malfunctioning seat belt sensor

I'm in the far end of a road trip, and towards the end of the road trip my seat belt warning started going off erratically. Tapping on the driver side seat belt buckle seemed to silence the warning ...
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1answer
33 views

Can something as simple as a bad o-ring cause complete sensor failure?

About half a week ago my car began stalling out, seemingly at random; at first I thought it might have been an issue of air bubbles in the coolant passing over the coolant temperature sensor - there ...
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29 views

Where can I find information about car PIDs?

i'm doing a research and i can't find voltage information from the car sensors, where do you find such information? finding the voltage range would help a lot.
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30 views

I cant figure out how to unplug the temperature sensor on my 2006 KIA RIO

What is the trick to unplug the temperature sensors on a 2006 KIA RIO
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49 views

Affected sensors when boosting another car

I own a 2017 Kia SUV and periodically I'll give my neighbor a boost on their 2002 Liberty Jeep periodically, maybe once or twice a month, until they buy another battery. So I noticed a couple of times ...
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Power cable in 02 Chevy Suburban - where does it go?

I noticed on my 2002 Chevrolet Suburban that there’s a cable under the bonnet that’s unplugged and I’m trying to work out where it goes. I’ve included photos of it and where it runs. There’s no ...
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17 views

2000 Chevy 3500 Express strange MAP sensor OBD-II readings

A 2000 Chevy 3500 Express 5.7 Vortek has always run fine but has a major problem with torque when towing uphill. By chance I stumbled across the MAP OBD II readings and they are way off. It shows 9&...
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59 views

Divide by 2 for “wasted spark” motorcycle rev counter input

My motorcycle just got an upgraded ignition timing method. This new method fires the spark plugs twice each cycle which in turn increases the RPM * 2 according to the tachometer. Is there a way to ...
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68 views

List of sensors on cars

Over the years, I have gone from being frightened to performing repairs involving sensors to feeling like sensors are my best friends. They greatly reduce the guesswork necessary in repairing a car, ...
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73 views

What in the heyl is this thang?

I done bought me a mysterious 1998 5.4 v8 ford van. Econoline series. Done some snoopin under the hood and found this dang weird plastic box just hangin... danglin there zip tied to the dang high ...
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2answers
151 views

What is the cable connected to the base of the exhaust manifold

I'm currently taking apart an old vehicle which was just lying around. While dismantling the exhaust manifold, I noticed there was a cable that connects to its base, right before the point where it ...
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1answer
79 views

2014 CX-5 hot air - possible overheating?

Hopefully someone can shed some light into what's going on. For the last couple of days we have been in a cold snap around -30C. I was driving the car and noticed that the ambient (outdoor) ...
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147 views

o2 sensor readings don't make sense to me

I get these readings as showed in the graph below from both o2 sensors and I am having a hard time to interpret them, especially sensor 2 (downstream). The readings are from a short drive around town (...
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1answer
61 views

Are the high and low fuel pressure sensors the same part?

I have a 2013 Ford Escape 1.6L se 2wd, my question is the high fuel pressure sensor and the low fuel pressure sensor the same part? My mechanic gave me a part # bm5z9f972a and the part # for the high ...
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114 views

Chevy Equinox Cabin (Interior) Temperature Sensor

Does anyone know the location of the Cabin (Interior, NOT ambient) Temperature sensor? This is for a 2012 Chevy Equinox 2.4L LT2. TIA Scott
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1answer
29 views

Tips for diagnosing a sensor error that persists after sensor is replaced

I have a 2009 Mitsubishi L200 2.5 that has a diagnostic code which reads "P0113 Intage Air Temperature Sensor 1 Circuit High Bank 1". I have replaced the sensor and cleared the error code but it comes ...
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1answer
21 views

Temp gage randomly stops working while driving and ac doesn’t work. 2015 Chevy cruze

I have a 2015 Chevy Cruze and randomly my temp gage stops working and my ac doesn’t run. I changed both the coolant sensors and if I disconnect the battery and reconnect it then everything runs ...
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2answers
245 views

Which sensor is this?

My vehicle is a 2015 Volkswagen Passat Wolfsburg edition. I ran over a squirrel the other day on the driver side of my car and it has done some damage to my bumper shield and also a sensor. This is ...
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1answer
368 views

Toyota Funcargo (Yaris Verso) 1.3 VVTi (2NZ-FE) connector near oil filter

I was seeing my Yaris Verso VVTi 2NZ-FE engine and a cable was hanging (with light grey connector, 4 pin socket, and a single wire line) that is not connected anywhere. I tried to search for the ...
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447 views

Where is location of AC pressure sensor on 2007 Buick Lacrosse?

I will replace the AC pressure sensor/pressure switch on my 2007 Buick lacrosse. I don't have lots of experience but I am learning. I recently changed the oil, flushed the coolant, replaced the ...
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661 views

Do I have to disconnect the battery before I replace AC pressure sensor/pressure switch?

I did some research and with some people's help, I think my AC pressure sensor/pressure switch doesn't work properly. When I try to turn on AC I see the light come on but it doesn't give me cold air. ...
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63 views

Ambient Air Temperature

Put a plow on my 2014 1500 Silverado after driving for about 20 minutes temperature outside reads over a hundred can i reposition sensor or remove it.
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25 views

2005 Ford Escape (Hybrid) Hood Ajar alarm triggered when left blinker is on

I seem to be having an electrical issue with my 2005 Ford Escape Hybrid. Whenever using the left blinker, the Hood Ajar alarm goes off and continues beeping until the blinker is turned off. It does ...
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102 views

P0406 Error - Ford Figo

I bought a second hand Ford Figo 2011. The vehicle has driven around 56k kilometres. Recently there was an issue with the starter motor, which I got fixed. After that the Check light is on. The Ford ...
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1answer
652 views

How often should we change Coolant Temperature Sensor, and is it life time long?

I drive Nissan Sunny 2010 N16, it has 225000 KM, I am experiencing extra fuel consumption, for 45 Ltr it makes only 350 KM in average (high way/city) driving, one week back I changed the oxygen sensor ...
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1answer
934 views

How to fix a speed sensor signal problem?

TL;DR - My transmission computer says its output shaft speed sensor reads 0, what is wrong? I am trying to troubleshoot a problem I am having with the speed sensor on an older automatic transmission, ...
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1answer
52 views

What kind of MAF sensor is this?

A Bosch MAF sensor from a 1994-1996 Volvo looks like this: I have read about different types of these old sensors and they all mention a "wire", however I cannot see a wire in this sensor, just a ...
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28 views

02 Taurus no acceleration, miss shifting, and no power

I have a 2002 Taurus 3.0 OHV. I'm getting no acceleration, miss shifting, and no power. I installed a new EGR control valve, differential pressure sensor, air filter, and coolant temperature sensor, ...
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16 views

device/rig to establish ground truth data about car parameters [closed]

We are looking to conduct research into automotive technology and were wondering if there exists some device/rig that can help in measuring vehicle parameters to establish ground truth. We would like ...
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1answer
652 views

Seat occupancy sensor malfunction VW Jetta 2008

I have a problem with the passenger seat occupancy sensor. It doesn't understand if someone is seating and the seat belt warning light doesn't turn on if the passenger is not wearing his seat belt. ...
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336 views

engine oil temperature sensor problems

I'm Getting a dtc for the eot sensor low voltage. According to the manual this happens when the voltage is less than 0.07v. The connector is plugged in properly. I have checked continuity between the ...
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0answers
17 views

06 Jeep Cherokee 8cyl; Auto transmission

It seems that I am annually having to replace the “map sensor” and various parts associated with that. Last week I replaced it again, and next will be the “auto throttle body” or something with the ...
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400 views

Hi I’ve got a 2013 insignia 2.0CDTI coolant problems

Coolant warning message keeps coming up on dash checked level ok replaced sensor but message keeps coming up help
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3k views

ABS/ stabilisation control error

I have polo 1.2Tsi 2015 model, here is the problem : my clutch eas dead and i bought new one and fitted it in, after i started the car it did not move at all, it showed ABS/ STABILISATION CONTROL ...
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0answers
639 views

W204 C180 Manifold absolute pressure sensor

I am trying to install a RaceChip unit in my car. I need to find the Manifold absolute pressure sensor. I am aware that it’s near the air box, but I can’t find it. Here is where it should be: Here ...
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1answer
351 views

i have a 2008 chevy trailblazer 4.2 i need to change the ECT sensor

I can not seem to locate the part on my vehicle i have looked at you tube videos and have found every one except 2008 4.2 engine
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412 views

Toyota Gaia 2001 model. ABS check light showing. Speedometer not working

My car is showing ABS check light, the speedometer is not working. The fuel consumption is high, and it's slow in changing from first gear. I don't know if any of these faults are connected. What ...
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1answer
338 views

car fan kicking in even when the engine is cool

I have a 2010 Citroen C3 Picasso 1.4 petrol. A few months ago my car fan became very noisy after a long journey. Since then the car control panel is telling me the engine is overheating even if I have ...
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1answer
440 views

2006 BMW E 60 525I engine oil level sensor giving faulty reading

The electronic oil level sensor is giving a faulty indication, by using E 20 engine flush chemical, can I clean the sensor and clear the fault?
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72 views

Truck fleet monitoring project

I need to design a truck fleet monitoring system and make a prototype of it during my traineeship this year. I've been looking into the different buse networks that are already implemented in trucks ...
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2answers
38 views

Will having the door light on all the time hurt the battery? Is it easy to fix on suzuki xl7?

I have a 2003 suzuki xl7 that I've been running for 10 years. The door sensor is wacky now and is on almost all the time. It reacts when I'm driving and when I park is always on. I've tried to get ...
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1answer
996 views

2001 VW Passat - Repair or Replace Brake Pedal Sensor

I recently found that the brake sensor in my brake pedal isn't working. This is the sensor that both allows cruise control to engage/automatically disengage when you hit the brake, and the same sensor ...
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1answer
2k views

2002 lincoln LS 3.9 v8. coolant temperature sensor location, does anyone knows where is it at?

the computer is saying that the temperature sensor is bad. i want to replace it, but i can't find where is it at. engine light is on. I have look for it all over google, the auto parts store, and ...
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3answers
3k views

How should Camshaft Position Sensor output look on oscilloscope?

My Chevrolet Aveo 2007 had P0340 code and crank, but no-start condition. I bought a replacement camshaft position sensor. The P0340 code is not there anymore, but the car still does not start. First ...