Q: BMW 528i 2000 (E39) fault codes P1523 and P1397

asked by on September 05, 2017

Hi, I have a BMW 528i 2000 (E39), that has the fault codes P1523 and P1397 (it takes several days of driving to have the codes show up after I erase them). The exhaust camshaft sensor has been changed recently (a few months ago). I was wondering if the intake camshaft sensor could be responsible for these codes or would it be more likely that the VANOS is the issue and need to be repaired (like with the beisansystems seal kit). Or does it indicate something else completely. The car is running smoothly most of the time, but it is true that the acceleration is a bit sluggish when the car is cold. Spark plugs also have been replaced recently.

thanks,

Alex

My car has 226000 miles.
My car has an automatic transmission.

The vehicle should be inspected and diagnosed first hand but I can tell you broadly that if the seals on the VANOS system are original they should be replaced due to the age and mileage you are reporting. Camshaft position sensors can be easily tested using an appropriate scope and, more likely than not, yours is fine. The seals though (consisting of o-rings and other components) are notorious failure points. Seals have a limited lifetime in any event but as an internal engine component, operating life is even shorter. To schedule a diagnostic, as well as seal replacement, please use YourMechanic’s service request page and just indicate on the page, "VANOS system seal replacement" and a certified mechanic will provide the estimate. If you have further questions or concerns, do not hesitate to re-contact YourMechanic because we want you to make the most of your repair dollars and help you to get the best possible results.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

EGR valve and vacuum

If you got code P0401 for the EGR system malfunction, then the system would need to be tested to see whether or not the vacuum modulator valve is holding vacuum and can control the EGR valve. These tests are needed...

What will cause a motor to knock?

Hi, thanks for writing in. Engine knock is typically caused by excessive clearance in the lower engine bearings (rod and main). Of course, to know for certain, a professional would need to listen to the noise firsthand. Spark knock, which...

Bolt problem

It is common for this to occur on this engine. It is typically due to corrosion caused by electrolysis. Once this occurs the bolt almost fuses itself to the metal around it. In some cases, using a penetrating lubricant can...

Related articles

5 Essential Things to Know About Luxury Vehicles
There’s There’s something to be said about the looks and offerings of luxury vehicles, but appearances can always be deceiving. If you’re considering buying a luxury car, there are a few things you need to know before you make your...
A Buyer’s Guide to the 2012 BMW 1-Series
The The 2012 BMW 1-Series, which includes both the 128i and the 135i in both a coupe and convertible options, provides the perfect combination of power, performance and luxury. Designed with a focus on thrilling acceleration and a smooth, elegant...
The Best Used Cars to Buy If You’re Shorter Than Average
Vertically Vertically challenged? Hate getting behind the wheel and having to crane your neck to see? There’s nothing wrong with you, but there is something wrong with your car. It might be time to trade it in and take advantage...