Faulty sensors preventing startup
My car is not starting. I believe my sensors need to be replaced.
Experienced mechanics share their insights in answering this question :
Hello, from what you are describing, I am assuming that you are referring to your crankshaft sensor. Before replacing parts, you should have the car scanned for codes and data monitored. If there are no codes, the crankshaft RPM can be monitored, if there is RPM, then more diagnosis will be needed to find the cause of the no-start. There could be a lack of ignition or fuel. I recommend having a certified mechanic, such as one from YourMechanic, come to your home or office to diagnose why your car is not starting and make the necessary repairs.
How to Identify and Fix Common car Problems ?
Our sources include academic articles, blog posts, and personal essays from experienced mechanics :
The most common reasons a Mitsubishi Galant won`t start are a dead battery, an alternator problem, or failed starter.
There could be several reasons a Mitsubishi vehicle isn`t starting, including a dead battery, faulty alternator, clogged fuel filter, or a malfunctioning starter. To troubleshoot the issue, it`s important to diagnose the root cause and address it accordingly.
If your vehicle won`t start, it`s usually caused by a dying or dead battery, loose or corroded connection cables, a bad alternator or an issue with the starter. It can be hard to determine if you`re dealing with a battery or an alternator problem.
One common culprit for this problem is the crankshaft position sensor, which measures the position and speed of the crankshaft. The computer uses the information from this sensor to know when to fire the spark plugs. If the sensor isn`t working, the spark plugs won`t fire, keeping the engine from starting.
All Mitsubishi systems from the Mitsubishi 6000 BTU mini split to the 42,000 BTU mini split have at least one wireless remote control. These remote controls have a reset button at the bottom under the panel. Pressing the reset button ensures the remote is working correctly.
Connected to the battery is the alternator, which works to generate power for your vehicle`s electrical components. When you have a brand-new battery but still can`t start the car, the alternator might be the issue. Cold and damp climates may increase wear on an alternator, causing it to fail.
Use a portable jump starter or use another car to jumpstart your vehicle. Either with a portable jump starter or with a jumper cable connected to another car. It`s pretty easy to jumpstart your vehicle. All you have to do is connect to identify the ignition coil and the battery.
If the engine crank fails when you press Start in your push-start system car, it`s possible your key fob has issues or is dead. With a dead key fob battery, the button won`t receive any signal from the key fob, and your car won`t start. What can you do about it? Just replace the dead car key fob battery.
Flat or faulty car battery
A flat battery is the most common reason your car won`t start and can be caused by a number of things, such as lights being left on, something in the electrical system causing a battery drain, or even a faulty battery that won`t hold its charge.
Relevant Questions and Answers :
the most relevant questions and answers related to your specific issue
check engine light O2 sensor already replaced same codes still popping up after replacing old O2 sensor
Hi there. What you received from the parts store was a code retrieval, not a diagnostic. The codes are set when a fault is detected against normal operating parameter. The computer does not know what caused the fault, only that the fault meets the criteria for this code to set. There could be a problem in the wire harness, converter, or the ECM. The code and data are needed to properly assess the direction that a diagnosis needs. I strongly suggest having a qualified technician perform an inspection to avoid replacing unnecessary parts. Your Mechanic has several available technicians that can assist you with a check engine light inspection.
Can i use gm part 55591002 for both sensors?
Hi there. Sometimes the material of the contact on a sensor can produce a false reading or not correctly connect to the electrical harness; so if your trying to test the sensor to see if it works, and the OEM sensor is made of a different component or designed for a different use, it’s probably not best to try that. I’m not sure if it would negatively impact the ECU, but I have seen stranger things cause communication errors.
I have a bad oxygen sensor, bad power steering sensor, and a bad cam shaft sensor? Should I replace any of them?
When you say you have three bad sensors I can only assume you have had them tested and the end result is three bad sensors. If they tested bad then they should be replaced. The power steering sensor senses the load of the steering on the engine so it can raise the idle during parking maneuvers. The O2 sensor is used for fuel control and it may effect engine power and fuel mileage. The camshaft sensor cay cause no starts, engine running problems and all three will turn on the check engine light.
Knock Sensor + Wiring Harness installation cost? Will YourMechanic install parts if I provide them?
Hello. Yes we will install parts that are provided by you but doing so will void our warranty. You will also be charged for the technicians time if the part you provide does not fit properly. After we install the parts if the condition returns we will come back out and inspect the vehicle. If the issue is not related to the service we performed you will be charged an inspection fee but if it is related we would turn that over to our warranty claims department. The harness is something that our parts department can obtain for you when you’re ready to schedule your next appointment. I will ask our customer service department to send you a quote for the knock sensor installation and they should be able to get a price for that harness too. Thank you for choosing YourMechanic!
I did replace the heater core and two sensor the crank sensor and camshaft sensor it didn’t work can it be the computer
If the check engine light is on, what kind of codes is the system detecting? Do you have spark at the plugs? If you have spark, does spritzing some starter fluid give you a momentary startup? If so, there is a fuel issue. More symptoms and information on the car’s behavior before and after the parts you replaced would be very helpful. At this point, I would recommend an inspection from YourMechanic.com to diagnose this car starting problem, get an accurate assessment of damage and cost estimate for repairs. YourMechanic.com can dispatch a mobile, professional mechanic to your location to help you get your car up and working again.
TIRE PRESSURE SENSOR FAULT: How do you determine which sensor is faulty?
Depending on the vehicle and tire pressure system you can find out what sensor is defective by scanning the TPMS system to isolate the failed sensor. Another way is to use a sensor activator scanner near each wheel to test each sensor’s output.
Car won’t accelerate past 25 mph and makes deep noise when you try too replaced o2 sensor maf sensor/ throttle body does rattle
Hi there. It is quite possible that your car has entered what we call a fail safe or "limp mode" due to an error code being activated and stored in the ECU. This will occur when the ECU or a sensor detects a mechanical or electrical fault on one or several fuel, ignition, cooling or powertrain systems. It’s designed to allow you to safely "limp" your car to a repair facility or home so a professional mobile mechanic can complete a car is slow to accelerate inspection and determine the right course of action. It is also possible that this issue is caused by a loose vacuum line or other component like the throttle position sensor.
Check engine light – O2 sensor circuit + speed sensor circuit…
Hi there. O2 sensor low voltage can be caused my a number of things. Mass air flow sensor was only one of them. It can be a bad O2 sensor, coolant temperature sensor, or wiring issue.
What should be done is a proper diagnosis for the Check Engine Light. Using a complete scanner rather than just a code reader gives a technician the opportunity to not only read trouble codes, but to read voltages for individual sensors. While a code reader tells you the relevant system that set the Check Engine Light on, but with a number of possible causes, the full scan tool allows checking of each individual cause. Having a proper diagnosis will help you have this repaired correctly without replacing parts that are not faulty.