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540i

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Question
Power steering cutting out
Hi, first I would recommend checking the fluid level under the hood and make sure the level is correct. If you are low on fluid, it can create pockets of air, causing a loss in power steering as you turn...
Question
Fail Safe Mode coming up on dashboard
The output speed sensor is a very important sensor for the computer in your BMW 540i. It uses this signal to determine shift points as well as when to lock up the torque converter. If the computer detects a problem...
Question
lights won't turn off
These types of lighting malfunctions can occur if the lamp module has failed. This module generally needs to be coded by a dealer if it is replaced unless you can either locate a precoded lamp module from the dealer or...
Question
clutch not working properly
If the engine RPM's raise and speed does not match especially under loaded acceleration or in higher gears, this is the first indication of a worn clutch disc. Clutch disc thickness needs to be checked and if the thickness is...
Question
air conditioner not working
It definitely sounds like the IHKA control unit, especially since the displays are not working. One other possibility, and this still may be an issue if the blower cannot be controlled, is a failed final stage, which is a common...
Question
poor acceleration check engine
You will want to have the catalytic converters checked. The 540's are notorious for the catalyst inside the catalytic converters breaking apart from the outer wall of the assembly and rattling around, especially upon take off. This will also create...
Question
starting problems voltage surge
Overvoltage spikes can cause damage to any of the computers on the CAN bus which are involved with the vehicle starting system. However on the 540's, in the e-box under the hood, the main relays are known for failure and...
Question
Battery light is on and car has no power steering
If the Battery Light is illuminated and the battery passes a load test, then you most likely have a faulty alternator; a charging system test would need to be performed to verify this. On the 2001 540i, the power steering...
Question
Cheap ABS code readers for 2000 BMW 540I
For a BMW, there aren't that many options. You could try Actron -- they make one that costs 250 dollars. I use it all the time. I don't know if it will read it on a BMW, but it'll read...
Question
Engine code after repair
If the sensor is defective then the sensor can be replaced without replacing the entire housing again. The sensor will need to be checked with a scan tool to see if its giving the correct readings by comparing the data...
Question
Camshaft position sensor error code P0343
Hello. The P0343 code indicates there is no signal from the passenger side cam position sensor (Bank 1 actually). Given you have changed the sensor, this would suggest a wiring or connector issue. Your mileage would also make me anxious...
Question
Stalling immediately after starting
Hey there: You might want to disconnect the transmission linkage and manually shift into neutral to move your car the 3 feet you need. Starting a modern engine without having all components properly installed can cause serious damage to multiple...
Question
I had to change output the speed sensor, but my car still drive in 5 high. What do I need to do?
Hi there. Since you have replaced the speed sensor and your vehicle is still giving you the engine light code P0720 for the speed sensor circuit malfunction, then you would need to check the circuits from the speed sensor to...
Question
Need price to replace water pump ($90 to125 pump) along with serpentine belt main drive and AC serpentine belt
Hi there. You can request a price estimate for these services by starting with the water pump replacement project. Simply click this link to the service page and enter your vehicle information and location after clicking the Get a Quote...
Question
Entire bank1 misfires, and lower compression. 1997 BMW 540
Hi there - yes, it is possible to have cam timing for one cylinder bank off after a timing chain component repair. Way too easy actually with this engine! If you did not loosen the cam sprocket to cam bolts...
Question
Hi I have 97 BMW 540i, replaced radiator, water pump, and thermostat.. and a engine temperature sensor and it is still overheating
The heater not working in some cases may be related to the overheating problem you are also having. This may be due to a faulty heater blower motor or potentially a bad heater core. As you may know, the heater...
Question
Why does my car have to turn over a couple times when it is mildly warm?
You may have a problem with injector leakage. When the car has been running the fuel system stays pressurized for a few hours. When the injector valves are old, there may be a small amount of leakage at the tip...
Question
Do I have to buy a new transmission ?
What you are describing is often a sign of low transmission fluid or a faulty transmission control solenoid. As you know, automatic transmissions use pressurized hydraulic fluid to change gears. Every time a gear change is required, the car's computer...
Question
P0505 code Idle Air Control for bmw 540i
The TPS can have between 5 and 10 different codes and all will be caused by different failures of the TPS, Throttle body, wiring or computer issues and you will need to supply the code you get to help you...
Question
Car won't start after battery replacement
I would suggest having the alternator checked to determine if it is receiving the proper amount of voltage from something called the voltage regulator. The voltage regulator regulates the charging voltage that the alternator produces, keeping it between 13.5 and...

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