Hot answers tagged

4

You don't absolutely need to install a new O2 sensor, however there are some huge drawbacks to doing so. As the mechanic stated, it doesn't affect how the engine runs. The downstream O2 sensor (in your vehicle) only checks the efficacy of the converter. The drawbacks to running without the sensor are, your Check Engine Light (CEL ... what you called "...


4

The engine oil stayed on because it indicates low oil pressure, theres no oil pressure until the engine is running. The battery light stayed on because it indicates the alternator isn't charging. It doesn't charge until the engine is running. The check engine light stays on until the engine is running. It turns off when the engine is running with no faults....


4

If there was a sensor to stop the engine, it would most likely cut the ignition to prevent it from running, not lock it from turning. What you have described sounds like the engine was starved of lubrication resulting in bearing seizure, or worse. You will need to break it down to find the fault.


3

When you first start a car it's common for all the dashboard lights to come on for a few seconds, but then disappear unless there's some sort of problem. The Brake light would indicate your emergency brake is on or that there's a fault in your braking system somewhere, and the battery light would indicate an alternator problem or low battery charge. The ...


3

It sounds like the car is unable to maintain sufficient pressure in the fuel rail. Have a look at this answer for more details on potential causes for hot start problems. It is usually a good strategy to confirm suspicions through measurements and/or diagnostic tests, many of which can actually be performed by an average DIY-er. As you saw with the MAP ...


2

I would suggest you need to clean your intake tract, mass air flow sensor, and throttle body, plus change the air filter if you haven't done so recently. I would bet you have some carbon or gunk causing the engine to hesitate in some situations. The idle air control valve may be dirty/sticky causing the issue as well. Do a complete upper end cleaning and I ...


2

In your vehicle there is a heater core inside the dashboard. Engine coolant runs through this core all the time. There is a small door inside the HVAC (Heater, Ventilation, Air Conditioning) system that controls air flow through the heater core. When you want full cool that door shuts off all airflow through the core. In full heat mode all the air is forced ...


2

As stated by @Terry Gould, most cars do this. All the lights turning on is a bulb-check feature, or at least, that's what I've been using it for :) The lights that stay on is explained by Terry. You should only worry about lights that stay on while the engine is running.


2

Take the car into a dealer/certified Hyundai repair shop and ask them to check (or replace) your Boost Pressure Sensor Harness. I had this same problem in my 2017 Hyundai Tucson Sport, if I'm understanding you correctly. When I would try to accelerate, the engine would rev up but no acceleration would be applied for about 1-2 seconds, which felt very scary ...


1

If it is starting but idling poorly and not revving that would suggest the glow plugs aren't the issue, I'd be thinking EGR, either the valve itself or the control solenoid. They are a bit of a pain to get to on the Tucson (unless you are taller than me!) but easy enough to clean once off the car. WD40 should do the trick.


1

Its not your steering wheel: the front wheels of your car are misaligned. Probably the mechanic that worked on your cars suspension didn't mark any settings before he started taking it apart to replace the bushes, so part of the suspension reassembly was guesswork. In my opinion an alignment job should be standard practice after most suspension work. I'd ...


1

I can only speculate why no freeze frame data is being stored with the p0171. My "guess" would be that it is a 2 trip code, and you are seeing a pending code on the first trip. When it comes to p0171, you don't really need freeze frame to help you out. Since this code is a direct result of fuel trim, the next logical step is to see if the total fuel trim, ...


1

Muddy oil indicates coolant has gotten into the oil caused by a headgasket failure. Depending on the severity of the leak in the headgasket you may have either starved bearings and cylinder walls of lubrication, or had a lack of proper cooling- either of which could have caused a seized engine. It probably won't be cost effective to rebuild this engine if it ...


1

They should be able to turn down the rotors to remove any rust or corrosion. If the pads are rusty they could be locking up and should be replaced. If you want you should be able to find the rotor thickness limit and measure them yourself. Harbor Freight sells an inexpensive digital caliper used to measure brake calipers. HF caliper Have you taken a look ...


1

You're on the right track by thinking they are "stale." I recently replaced my rear brake pads and rotors with a higher-quality brand. What I observed with the worn out OEM rotors was that they collected rust an an alarming rate. Since your vehicle was sitting for long periods, the higher accumulation of abrasive rust on the rotor wears them down faster, ...


1

I don't agree with your diagnosis. You could have a faulty injector which is causing the cylinder with the problem to run lean. This could cause the plug to overheat and wear out quickly. Was the plug clean and shiny, not black? Seems like it is more likely running rich, could still be an injector problem.


1

If you rev the engine up and it starts to cool down, then you may be a little low on refrigerant. If you really need to start moving, then the electric fans that are usually controlled by the a/c system may not be working. They assist in cooling the condenser at the front of the engine bay, when there isn't sufficient air flow.


Only top voted, non community-wiki answers of a minimum length are eligible