Replaced crankshaft sensor and timing belt on 05 kia optima lx after. Kia engine kept stalling cutting off now its still not running
I was on my way to go get my 05Kia checked out after the check engine light came on but it died and I had to have it towed away and the reader show it comes down to the crankshaft position sensor code showed up replaced the crankshaft position sensor and timing belt and the only way to start my Kia optima lx was with engine starter what is the solution for this vehicle I've never had a problem with the vehicle not running properly before what's the problem? Tyvm
My car has 98000 miles.
My car has an automatic transmission.
Experienced mechanics share their insights in answering this question :
Hello. If the vehicle is not starting after the timing belt was replaced, then the compression needs to be checked as the timing may still be off. If the compression is fine, then the crank sensor may not be installed correctly or it may be defective. I usually install my scan tool to monitor its reading to see if it is working correctly. If it is, then further testing will need to be done as it may have another sensor failure or possibly a fuel system issue. If you need to have this no-start issue diagnosed, consider YourMechanic, as a certified mechanic can come to your home or office to have this resolved.
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There`s a chance the new sensor is a dud or was installed incorrectly. This would cause your car not to start. Or, while installing the crankshaft position sensor, a new problem with your engine occurred. Engines are finicky, and a single misplaced component can cause your engine to not turn on at all.
NOT PERFORMING A RELEARN PROCESS
In rare cases the engine may misfire or go into “reduced power” or “limp mode” especially under high RPM/load situations Additionally, omission of the relearn process could cause the vehicle to be unable to pass an emissions test due to incomplete or failed misfire monitor.
The crankshaft position sensor monitors the position and speed of the crankshaft and other parameters that play an important role when starting the engine. If the crankshaft position sensor is having a problem, the vehicle may have intermittent starting issues or not start at all.
The most common reasons a Kia Optima won`t start are a dead battery, an alternator problem, or failed starter.
You don`t need to reset it, once the engine turns over it will send the information to the ECM and the ECM will be ready to start the engine.
Car Will Not Start: Over time, as the camshaft position sensor fails, the signal it sends to the engine control module weakens. When the engine no longer receives the signal, you will not be able to start your car.
This usually means the battery is bad and incapable of handling a huge request for power to crank the engine over. Headlights begin white and bright, when you try to start the engine, they dim to nothing or almost nothing then as soon as you let go of the key, the headlights QUICKLY bounce back to white and bright.
When your engine cranks but won`t start or run, it could mean your engine is having trouble producing a spark, getting fuel, or creating compression. The most common causes are problems in the ignition (for example, a bad ignition coil) or fuel system (for example, a clogged fuel filter).
Dead car battery: A dead battery is the most common reason why a car won`t start. If you have a battery tester, check your battery to see if it`s weak. If you don`t have one, try to jump start your car with jumper cables.
While the new sensor is now installed, and you may get lucky and have it function perfectly right from the start, it`s highly recommended to “relearn” the sensor at this point in order to calibrate the entire system properly.
When replacing a camshaft sensor, there are important steps that should not be overlooked. A crucial step is reprogramming the new sensor using an OBD-II scanner. This step is necessary to clear any error codes that may be stored in the engine controller.
Unfortunately, there`s no way to reset a camshaft position sensor. If you`re having camshaft issues (check engine light on, acceleration trouble, sputtering and stalling, etc.), you`ll have to replace the part entirely.
Relevant Questions and Answers :
the most relevant questions and answers related to your specific issue
Replaced crankshaft sensor and timing belt on 05 kia optima lx after. Kia engine kept stalling cutting off now its still not running
ANSWER : Hello. If the vehicle is not starting after the timing belt was replaced, then the compression needs to be checked as the timing may still be off. If the compression is fine, then the crank sensor may not be installed correctly or it may be defective. I usually install my scan tool to monitor its reading to see if it is working correctly. If it is, then further testing will need to be done as it may have another sensor failure or possibly a fuel system issue. If you need to have this no-start issue diagnosed, consider YourMechanic, as a certified mechanic can come to your home or office to have this resolved.
I have a 96 Ford ranger with cel p0340 I have recently done a timing belt, engine runs great replaced cmp sensor cel still on
ANSWER : Hi There,
This may happen for a couple of reasons. First, check to be sure that the connections to the sensor are clean and not faulty or broken. Secondly, check to be sure you replaced the correct sensor as there are two camshaft position sensors in some applications. If you need further help with this, please reach out to us here at YourMechanic as we are always here to help.
check engine light O2 sensor already replaced same codes still popping up after replacing old O2 sensor
ANSWER : 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.
When should I replace a motor mount on a 2004 kia optima?
ANSWER : Hello. The motor mounts on vehicles in general should be inspected every 50,000 miles. I’ve seen motor mounts become excessively worn on vehicles with as low as 30,000 miles so it wouldn’t be a surprise if yours are due for replacement at 60,000 miles. The main part of motor mounts and made of rubber and sometimes the rubber what the teary rate quicker than average depending on the types of elements its exposed to (heat,cold,vibrations,and rough driving are elements in which a motor mount will be exposed). I would say the book time for the motor mount replacement is about an hour and a half. I will get a quote sent to you regarding the labor cost.
To replace the crankshaft position sensor yes you will have to remove the motor mount, power steering pump and the timing belt. The crankshaft position sensor should be a 2.5 to 3.5 hour job. Technicians here at Yourmechanic could provide the repairs for you if requested.
Check Engine light comes on, mechanic replaced o2 sensor but light still comes on.
ANSWER : Hi there:
If the mechanic completed the O2 sensor replacement, reset the codes and the error code was triggered again, it is possible that the catalytic converter is damaged and needs to be replaced. However, it’s also very common for the electrical harnesses that power these sensors to become frayed, damaged or faulty; which can also trigger the check engine light. It’s not advisable to drive a vehicle with a damaged catalytic converter for extended periods of time, as it can cause damage to internal engine components.
Car stalls after water pump, timing belt, plugs, valves replacements
ANSWER : Many different systems can cause a stalling malfunction on your vehicle. The most common are a fuel pump, fuel filter, spark plugs, battery, wiring fault or a crank/cam sensor. If the timing belt slipped off and caused the components to be damaged this could also cause the vehicle to start. To have this diagnosed properly, have a professional technician, such as one from YourMechanic, inspect the stalling issue and perform any repairs required.
My Check Engine Light is on and my truck does not idle when cold. Do I need a new crankshaft position sensor or is this an ECM or timing chain issue?
ANSWER : Hi there. Your vehicle has an idle air control valve that adjusts the idle via commands by the ECU. What it sounds like you adjusted was the throttle plate position when it was closed and had no adjustment on the actual idle. Adjusting the throttle plate rest position is similar to holding the gas pedal slightly to affect engine RPM. The idle air control valve (IAC) can stick over time and mileage, whether due to contamination buildup or simple wear and tear which will require replacement to correct.
Reset what you adjusted and replace the IAC for the idle concern. For the Check Engine Light, there could be an issue with the wire harness, ECU, or even the reluctor plate for the timing chain. This wheel has several notches, or teeth, with one gap, or wide tooth, that denotes cylinder 1 TDC, and provides the ECU with the position of the crankshaft. The ECU uses this information with a similar sensor for the camshaft, compares the two, and determines the relational position of the firing order, etc.
There should be a 5 volt reference available at the sensor; if not, there could be a break in the wire or the ECU is not sending the voltage. Check the wire harness for an opening or short and repair as necessary. If the harness is ok, I suspect either the reluctor plate has failed, the new sensor is defective, or the ECU has failed internally. I recommend having a certified mechanic, such as one from YourMechanic, assist you with a inspection of why car does not idle, a replacement of the idle air control valve, and a Check Engine Light inspection.
Replaced a timing belt and timing belt tensioner pulley. Still wont run. Why?
ANSWER : If you broke the timing belt while driving then you may have bent the valves. You should have the engine compression checked to see if you are loosing compression due to bent valves. If compression is low then have cylinders leak tested to see which cylinder is leaking and what valves are bent.
