One of the first symptoms of a weak battery is that the comfort access don't work properly anymore. Either you need a few tries or it doesn't react at all. Also if the engine need 1-2 seconds more to start up, your battery probably causing the problem. And yep it is terrible what they are asking for a battery reprogramming..
One symptom of crankshaft sensor failure is not charging the battery when car is running. (hope somebody can explain the reason for it) And in depth of code reading revealed that on 2 ocassions my battery voltage dropped down to 10.6 volt. Awaiting sensor delivery. _____
227 posts · Joined 2008. #2 · Apr 9, 2011. battery. Go for a good long drive and see if it is still weak. Or get a battery charger and charge it overnight === actually new battery chargers will indicate the state of the battery when you connect it up. If the battery don't keep a charge then it is pretty well done..
low battery voltage is the cause of the no start, can be caused by the alternator not working. if the battery is quite low, a jump from a starter box or another car may not get it to turn over. think of it this wayan incompletely charged battery, when paralleled with a fully charged battery, becomes a load on the charged battery as the circuit tries to reach equilibrium. one thing to try is
Low battery symptoms? 1. Slow start (most obvious) 2. Trans program 3. Gauges go haywire, especially the tach 4. "Floating" gas gauge 5. Dim lights 6. Poor engine responce
NOTE: All measurements should be performed with the battery charger connected to the vehicle. 1. Measure the following at connector X6035 on the electric coolant water pump: - E90 and E91 - Pin 1 (fuse F09) and Pin 4 ground (X6455) = 12 volts. Banner are a BMW OEM supplier. Then I had the battery registered at a BMW specialist. Here's the issue - Before I had my batt replaced, my voltage reading was a consistent 13.5 - 13.6V under all conditions. After the battery swap, it's been reading between 11.8V - 12.5V, even at higher rpms. Only occasionally it will go up to 13.5V.
\nbmw e90 bad battery symptoms
In this video, you will learn 4 symptoms of a bad or failing engine control module. Watching this video will help you diagnose to see if it's time to replace
Sometimes the ground connectors get rusted. Remove and clean them or just measure the impedance of the connection or the ground voltage at the DME. Once this is all done, check all the connectors on the DME for rust, coolant or oil. Sometimes the wiring harness sucks up coolant or oil (in case of a leak) up to the DME.
Dead Battery. The first sign that your BMW alternator is failing is a dead battery. The battery is used to start your vehicle, so you won’t be able to start it if there isn’t enough juice left in it. This means a dead battery and a non-starting car can be indicators of an alternator problem.
Make sure the battery is for the correct one for car and model. Maybe its not the correct battery and is causing these faults. Call dealer and ask for part # battery your car needs and compare with the one you have. Buddy of mine had also electric issues caused by a simple lose minus or plus pool on the battery.
Fuel pump isn't that likely either, you don't hear many n52s having a bad pump. Ignition coils sound more likely, my sister's n52 was experiencing similar issues and she had a bad coil. If the cranking is really slow it could also be a problem with the battery or alternator. Also, running rich on a cold start is normal. _____
21 posts · Joined 2015. #1 · Nov 12, 2015 (Edited) This all started when the car was sitting without battery 5 weeks. Symptoms. 1.heater not blowing warm just cold. 2. The car starts up works for about 10 mins gets up to 180F after this the fan starts to blow very loud after this yellow warning then follows the red warning in about 25 seconds.
The answer to your question is yes. Hard starting and rough idle are the hallmark symptoms of a bad eccentric shaft sensor. Please let me know if you have further questions. Please do not forget to click a positive rating as this is the only way I receive credit for my answer, thank you. Best wishes with your vehicle.
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