After shop replaced my starter on 330ci bmw, my car is in limp mode

After the repair shop put my car back together after extensive work (4.5 hours labor) to get to the starter my car is in Limp mode. Shifts hard and runs bad. I'm taking it back in tonight and I'm certain they missed something while putting the car back together.

My car has 186000 miles.
My car has an automatic transmission.

Experienced mechanics share their insights in answering this question :
Hi. More than likely there is a fuse blown causing the car to be in limp mode. This could have happened when they reconnected the battery or when things were removed to get to the starter. The shop will always need to clear all the codes in the computer to properly get out of limp mode and is something the shop should be able to care of in a timely manner.

If you would like to have a certified mechanic to take a look, one of YourMechanic’s mobile mechanics can come to your home to diagnose the cause of the limp mode and perform a fuse replacement if needed.

How to Identify and Fix Common car Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced mechanics :

Linkage can sometimes become loose due to high vibrations within the engine, which prevents the car from going into the right gear, sending a fault to the control unit. If the solenoid (switch) within the starting circuit is damaged then this can also cause the car to enter limp mode.
If your car still goes into limp mode, disconnect the battery and wait for about a half hour to reset your car`s computer. After a half hour, reconnect your battery and shift gears to see if you are still in limp mode.
The MAF sensor regulates the air-fuel mixture in the engine and might become dirty. The dirt on the sensor sends wrong values to the control unit, and the limp mode is activated.
How to get your car out of limp mode. You may be able to reset the car by switching it off and on again after about 30 seconds. If the warning lights disappear and the car behaves normally, then it may have just been a temporary glitch.
1 Start motor engages but the engine doesn`t turn

The simplest cause of this sort of fault is a loose or corroded electrical connection. If there is a fault with the internal windings of the starter motor, bad brushes, or other electrical faults, the starter motor may lack the torque to crank the engine.

Have the vehicle diagnosed – it could be the starter, a bad switch, or a wiring issue. Slow Cranking – A failing starter motor can often seem like a weak battery while turning over. If the engine sounds strained or slow to crank when you turn the key, but the battery is fine, the starter is probably on its way out.
The computer may have run out of the battery power used to store important information. If this isn`t computing correctly, the engine will sense a problem and trigger limp mode.
Clear the check engine light

Use a reliable OBD2 scan tool to clear fault codes and reset limp mode. Just plug into your OBD2 port and search for the correct function.

Limp mode is a car security feature that activates when a fault is detected, reducing speed and switching off non-essential functions. It is triggered by abnormal signals from car components, such as faulty sensors, transmission issues, or low fluid levels.
Check fluid levels – Low engine oil, transmission fluid, or coolant levels can sometimes trigger limp mode. Check the levels and top off if necessary. Dirty air filter – A dirty air filter will prevent the smooth flow of fresh air into the engine. Inspect your engine air filter.
It is rare for a vehicle to enter limp mode without showing the check engine light, but it does happen. Most of the time, this is caused by an electronic control unit (ECU) that cannot read the signals properly. Some car components cannot signal to the ECU, triggering limp mode, although this is rare.
When a transmission fault is detected by the OBD-II system, the transmission may go into fail-safe (or “limp” mode as it is also called) in order to protect the transmission from internal damage that could be caused by the fault.
The starter is a small motor, powered by the battery. It gets the engine of your car running. A starter relay sits between the battery and the starter motor, transmitting power. Without a properly working starter relay and motor, you won`t be able to start your vehicle and may need a tow.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

After shop replaced my starter on 330ci bmw, my car is in limp mode
ANSWER : Hi. More than likely there is a fuse blown causing the car to be in limp mode. This could have happened when they reconnected the battery or when things were removed to get to the starter. The shop will always need to clear all the codes in the computer to properly get out of limp mode and is something the shop should be able to care of in a timely manner.

If you would like to have a certified mechanic to take a look, one of YourMechanic’s mobile mechanics can come to your home to diagnose the cause of the limp mode and perform a fuse replacement if needed.

Since the starter was replaced in 2014, is it possible that the starter needs replaced again as car is not able to start?
ANSWER : It would help knowing the model of Mercury car you have for more specific advice. It would be uncommon for a starter to only last less than two years. I would have the starting system diagnosed by a trustworthy technician to make sure you do not have a bad cable that is not getting enough power to the starter.

My Mitsubishi Lancer 2005 has a limp mode issue – the car does not erase trouble codes permanently (even by debugging or terminal disconnection)
ANSWER : I see the note where you have previously replaced several components on the transmission already. Do you recall the brand and warranty of these components? If the parts you replaced are still under warranty, you may be able to get new ones. Have the vehicles problem looked over by an experienced professional and test even the parts that were replaced to see if they may have failed prematurely. Computers do fail, but this is pretty rare. Consider hiring an experienced technician like one from YourMechanic who can come by for a closer look at your transmission shifting concerns and offer a more personal diagnosis.

I need my wastegates replaced. The turbos are good but the wastegates are rattling and car goes into limp mode @ high speeds.
ANSWER : Wastegate rattle is a common problem on your car. You can take the turbo’s off and re-install them, but then you will need to send them to a turbo specialty shop to have the wastegates changed and the housings re-bushed. There is a good chance the turbo shop will call you up and tell you a lot of other things have to be done too so you can check the price of new turbos against the price of rebuilding them to see what works for you. If you don’t want to deal with this yourself you can contact Your Mechanic. They will send a technician to your home or office to check out your turbochargers and let you know what you need to do.

The starter off and on wont turn over when trying to crank the car.
ANSWER : Hello, thank you for writing in. Often when starters are installed they come with a shim. These shims need to be installed to help hold the starter at the proper angle. If the angle is off the gears may not mesh correctly putting excess pressure on it that the starter cannot compete with. If the starter did not come with a shim, or you do not have it anymore, you can likely purchase or fabricate one relatively easily. If this does not solve the issue, make sure there are no wires that are being pinched or shorted out when the full weight of the car is being supported. For more help diagnosing the issue, contact our service department to schedule an appointment. And thank you for you service to our country.

Car will not crank after putting in a new starter. Forced starter to start up and engine starts but stalls out. Will the security continue to cut off fuel while force starting?
ANSWER : Hi there. Forcing the starter to engage to make the engine run without the ignition engaging the starter will continue to keep the security on. This is a safety feature that keeps people from stealing your vehicle. I recommend replacing the ignition switch and checking the wires to make sure that they are all tight and clean. If you need further assistance with diagnosing your ignition problem, then seek out a professional, such as one from Your Mechanic, to help you.

My car is in limp mode – 1997 Ford Taurus
ANSWER : If you cracked your oil filter and the engine pumped out all the oil and you continued to drive it, you may have damaged the internal bearing of the motor. If you perform an oil and filter change you may be able to start and run the engine, but the damage will have already of been done. Once you start the motor, if you hear engine noise then you will know the engine was damaged and will need major internal repairs or engine replacement. Have a mechanic like one from YourMechanic come and perform the oil and filter change and check for the internal engine damages.

2004 Mitsubishi Galant just got the starter replaced brand new car won’t turn over I have an alarm in my car can that sensor the c
ANSWER : If your vehicle was not starting but was turning over, I would have advised against the starter replacement. If the engine will turn over, the starter is doing its job. If you have an aftermarket security system on your vehicle, are unable to start your car, and are unable to lock and unlock the doors, I would recommend having the aftermarket security system inspected. The best place to have this done would be the place that it was originally installed as they would have the best knowledge of the system. This could be related to wiring, control modules, or other related components. Once the security system has been inspected, the repair procedure will be more clear.