Question about BMW Cars & Trucks

Open Question

2003 bmw mini fault code p1656 ews incorrect code

Posted by on


3 Suggested Answers

  • 2 Answers


Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

  • 1 Answer

SOURCE: bmw e39 1996 from ecu

signal,EWS manipulated

Posted on Jul 13, 2011

  • 475 Answers

SOURCE: ocv circuit in toyota

OCV is the oil control valve for the VVTi system, it's located on the side of the cylinder head at the front and has an electrical connector on it, the valve may the problem but it cou;ld also be a clogged oil passage that supplies regulating pressure to the valve or the VVTi gear, the system operation can be checked by connecting an intelligent tester that can activate the system to verify if the valve is the problem, before replacing expensive parts I would make sure what the problem actually may be.

Posted on Feb 28, 2012

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Bmw mini fault code p1656 ews incorrect code can you help

The code means that there is an OBD connection error.
Clear the code and test again after a drive.

Sep 19, 2018 | BMW Cars & Trucks

1 Answer


Hi David. There are usually 3 possible scenerios. I recommend trying another key if you have one. A diagnostic may be required to make sure the key is valid, the EWS and DME are aligned, and if the EWS is recieving a valid signal. The key and EWS are the two most common failures. If you replace the EWS, it must be coded and aligned to the vehicle. Greg

Apr 17, 2018 | BMW Cars & Trucks

1 Answer

Fault code on my bmw 318i 2737 ews what does it mean


Oct 15, 2014 | 2002 BMW 3 Series

1 Answer

Error code 2f44 bmw won't start tried to clear but comes back after every crank

Fault code: 2F44 EWS preventing manipulation.
This is a common fault code flagged by BMW vehicles when the EWS (also known as the CAS module or immobilizer) no longer communicates with the DME.
Some of the most common causes, for this condition, is battery failure or ignition key failure.
Many times, a customer will bring a BMW into the shop or have it towed into the shop, and explain that "the car just won't start, suddenly". Upon further investigation, it is common for a technician to find poor battery condition or a failed ignition key.
In the case of poor (low) battery condition. A low voltage level has caused the immobilizer (CAS/ EWS) to lose its alignment with the DME.
In the case of a failed key, the immobilizer (CAS/EWS) cannot "see" the key in the ignition and therefore will not allow the vehicle to start. This is the "no crank" part of this fault.
So where do we start?
Using a factory level scanner, connect to the vehicle. After identifying the vehicle, proceed to the immobilizer module (CAS/EWS) and investigate if the key can be identified. If the key in the ignition slot cannot be identified and the key slot/ receiver is functioning correctly, then the key must be replaced. Typically, at this point, the first thing we want to do is ask the customer if another valid key is available. If so, let's try this first! If not available, a NEW key FROM THE DEALER, must be purchased.
NOTE: Aftermarket keys will not work i.e. E bay etc. The keys for these cars are VIN specific and need to be supplied by the dealer only!
A new key will work "right out of the box" from a dealer. Simply put it in the ignition, allow the vehicle to identify it (give it about ten seconds) and try a startup.
After replacing the key and regaining key identification the immobilizer (CAS/EWS) must be aligned with the DME.
Using a factory level scanner, perform the DME to CAS/EWS immobilizer alignment procedure. Clear fault code(s).
So, what about the battery?
All the above information is based on having strong battery voltage. In regards to BMW vehicles, 11.0 volts is NOT good voltage. These vehicles are designed to operate in the 12.4 to 13.0 (average) voltage area.
Before attempting to start the engine, a technician should perform a battery load test. When working with BMW vehicles, if the battery is marginal or too old (more than three years old) replace it.
NOTE: New batteries for later model BMWs (CIP vehicles from approx. 2004) will need to be registered. With a dealer level scanner, a tech can perform this function.
Note: As time passes BMW will change the way immobilizers are aligned. Typically, this happens when BMW changes manufacturers. If performing a standard CAS /DME alignment does not work, A later procedure is available. With late model (EWS 3 type onward) immobilizers, the tech must perform a three-step procedure. Using a dealer level scanner, carry out 1) CAS reset, 2)steering lock counter reset 3) reset the starter interlock.

May 04, 2014 | Cars & Trucks

1 Answer


hii dear a hawe problem on my car is not start become 2737 fault code thank you for help

Aug 10, 2013 | BMW X5 4.4i

1 Answer

Hazard lamps & pwr locks inop

Hi jdrews,

First, have you checked the fuses?....Most likely cause of the problems..... I don't believe that there culd be any other linkage between the work carried out and the faults which your vehicle has......Second thing for me to find out from you....Is the vehicle fitted with an encoded key, the EWS anti theft unit? If it is, this may be a job for the service centre.

If you disconnect the battery with this system, the key code may be lost, which will mean re-coding, and that can only be done at the service centre....Without that you may never start the engine again....

Try the fuses first,

Regards Johngee10

Sep 06, 2008 | 2001 BMW 325

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

69 people viewed this question

Ask a Question

Usually answered in minutes!

Top BMW Experts

stephen Kiarie
stephen Kiarie

Level 1 Expert

32 Answers


Level 3 Expert

1234 Answers

Steve Sweetleaf
Steve Sweetleaf

Level 3 Expert

1165 Answers

Are you a BMW Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides