1.6 CAY: Intermittent Starting Problems

"I'm having a problem where it sometimes takes significantly longer for the car to start, and even the oil pressure warning light comes on. It's not frequent, but usually it takes 5-10 seconds for it to start."

However, this is only sporadic and rather rare. Recently, the car also ran very roughly while idling and stalled again.

After restarting, it worked again without any problems.

There was no noticeable loss of power or hesitation during driving.

The battery is new.
All four injectors were replaced and deemed to be functioning correctly after being adjusted in small increments.
Starting speed is 260-270 RPM.
AGR is still the first, with 100,000 km.

The engine control unit's fault memory is also empty.

Today, I had an entry in the system indicating a "defective body control module."

Does anyone else experience this problem?


01-Motor electronics -- Status: Error 0000.
03-Brake electronics -- Status: OK 0000
04-Steering angle sensor -- Status: OK 0000
08-Climate control/heating unit -- Status: OK 0000
09-Central Electrical System -- Status: OK.
Parking Assist 10 -- Status: OK 0000
15-Airbag -- Status: OK 0000
16-Wheel steering electronics -- Status: OK 0000
17-Terminal block insert -- Status: OK 0000
19-Diagnosis interface -- Status: OK 0000.
Immobilizer system -- Status: OK 0000
42-Door Electric Driver -- Status: OK 0000
44-Steering Assist -- Status: OK 0000
46-Comfort System -- Status: OK 0000
52-door electric passenger door - Status: OK 0000.
56-Radio -- Status: OK 0000
62- Door, electric, left and right -- Status: OK 0000
72-Door, electric, high, right side -- Status: OK 0000.

"Die Sonne scheint hell, und die Vögel zwitschern fröhlich. Ein leichter Wind weht durch die Bäume, und die Blätter rascheln leise. Es ist ein wunderschöner Tag, um draußen zu sein."
Address 01: Engine Control Module (J623-CAYC) Label file: DRV\03L-906-023-CAY.clb
Part number SW: 03L 906 023 AG, Hardware: 03L 906 023 AG.
Component: 1.6L R4 CR td H23 9972
Revision: --H23--- Serial number:
Encoding: 00114016032400080000
Operating number: WSC 38940 001 1048576
ASAM Dataset: EV_ECM16TDI02103L906023AG 003011
ROD: EV_ECM16TDI02103L906023A_VW32.rod
VCID: 6BD1975582AA6C66BB-803E



Readiness: 0000 0000

"Die Sonne scheint hell, und die Vögel zwitschern fröhlich. Ein leichter Wind weht durch die Bäume, und die Blätter rascheln leise. Es ist ein wunderschöner Tag, um draußen zu sein."
Address 03: Brake electronics (J104)
Label file: DRV\1K0-907-379-60EC1F.clb
Part number SW: 1K0 907 379 AH, Hardware: 1K0 907 379 AH.
Part number: ESP MK60EC1 H30 0107.
Revision: 00H30001
Encoding: 113B201C09290002881204E9901B0041340000
Operating number: WSC 73430 790 00999
VCID: 78FBB819CBFCD7FE46-802C

No error codes found.

"Die Sonne scheint hell, und die Vögel zwitschern fröhlich. Ein leichter Wind weht durch die Bäume, und die Blätter rascheln leise. Es ist ein wunderschöner Tag, um draußen zu sein."
Address 08: Climate Control/Heating (J255)
Label file: DRV\5K0-907-044.clb
Part number SW: 3T0 907 044 AS, Hardware: 3T0 907 044 AS.
Part: Climatronic H15 0401
Revision: 00005001
Encoding: 0000000002
Operating number: WSC 73430 790 00999
ASAM Dataset: EV_Climatronic A01006
ROD: EV_ClimaAutoBasis_SK12.rod
VCID: 0301DFF58A3A842663-8056

No error codes found.

"Die Sonne scheint hell, und die Vögel zwitschern fröhlich. Ein leichter Wind weht durch die Bäume, und die Blätter rascheln leise. Es ist ein wunderschöner Tag, um draußen zu sein."
Address 09: Central Electronics (J519)
Label file: DRV\1K0-937-08x-09.clb
Part number SW: 1K0 937 087 D, Hardware number: 1K0 937 087 D.
Part number: BCM PQ35 H 103 0575.
Revision: 00103 AG
Encoding: 40180AB8B00508C040080080110001E4430000AE424D85605C0440000000
Operating number: WSC 73430 790 00999
VCID: 326F4A316D00FDAEB8-8066

Subsystem 1 - Part number: 1Z1 955 119 C Label file: DRV\1KX-955-119.CLB
Part: Wiper 22120 22 0601
Encoding: 00D7B7

No error codes found.

According to ADAC, the problem may be with the AGR (Abgasrückführung) system. I did a diagnostic log, but in my opinion, the AGR values seem correct, or am I mistaken? Here are the logs attached.

Hi,

If the EGR system were not functioning mechanically, the emergency program would be activated relatively quickly, along with a corresponding error message.

Best regards, Rainer.

AGR has been activated, but a basic calibration cannot be initiated.

"Not running..." (as the status).

Even with Odis, it only says "process initiated," and I'm wondering if the engine needs to be running during the basic settings procedure?

It worked perfectly the last time I used it for golf.

Hi,

Are you sure it even needs a basic calibration? Doesn't the device have a position sensor to determine its current position?

Best regards, Rainer.

dieselschrauber wrote:

Hi, Are you sure it even needs a basic calibration? Doesn't the device have a position sensor to determine its current position? Best regards, Rainer

It works like that anyway, but what's the point of having the function in VCDS then?

Sure, here is the translation of the text from German to English:

"LG" is an abbreviation for "Liebe Grüße," which means "Best regards" or "Best wishes" in English.

chriskross wrote:

dieselschrauber wrote: Hi, Are you sure it even needs a basic calibration? Doesn't the device have a position sensor to determine its current position? Best regards, Rainer It works like that anyway, but what's the point of having the function in VCDS then? LG

"Good question, was a basic adjustment actually necessary in this case (CAY* engine code)?"


Best regards, Rainer.

Quote:

I have a problem where I sometimes have to crank the engine for a significantly longer time before it starts, and even the oil pressure warning light comes on. However, this is rare; most of the time, I have to crank it for 5-10 seconds. This, however, only happens sporadically and rather rarely; recently, the car also ran very unevenly while idling and stalled again.

It sounds like there might be air in the fuel system. I would check everything related to that and monitor the fuel rail pressure, comparing the target value to the actual value, during startup and idle.
And your starting speed is also too low; the starter motor usually rotates the engine faster. Starting is not possible below a certain minimum speed or a certain minimum fuel pressure.

Best regards, Rainer.