Hiccups or rpm drops

D

Dangelo64125

New member
Joined
Apr 29, 2020
Location
Ohio
TDI
2015 VW Passat
I have a 2015 vw Passat tdi. Might be obvious since I’m in the tdi forums. So the issue I have been experiencing is while driving might call it a hiccup or even a stutter. I notice the rpms jump or drop a bit. It’s almost like a stutter step. I have changed the fuel filter, oil change, and replaced the air filter. I do not know what would cause this. Has anyone experienced this or know what it might be? I would rather not take it to the dealer and pay $125 for a diagnostics fee if it’s only a $12 relay or something like that. Any help is appreciated.
 
MB2VW

MB2VW

Veteran Member
Joined
Jun 8, 2000
Location
Lighthouse Pt., FL USA
TDI
2015 Passat SEL,
You need to run a VCDS scan.
One of my fleet cars (15 passat tdi SE) has had a similar one time event. The VCDS stored this:
Address 01: Engine (J623-CVCA) Labels:. 04L-907-309-V1.clb
Part No SW: 04L 997 016 D HW: 04L 907 309 K
Component: R4 2.0l TDI H20 9466
Revision: 8AH20---
Coding: 011D0012032410080000
Shop #: WSC 05029 444 00000
ASAM Dataset: EV_ECM20TDI01104L997016D 004002
ROD: EV_ECM20TDI01104L997016.rod
VCID: 3467582A9F8DC326D6-8060
1 Fault Found:
23010 - Exhaust Gas Recirculation System
P240F 00 [104] - Response too Slow
Intermittent - Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 6
Mileage: 79243 km
Date: 2020.04.17
Time: 00:20:26
Engine speed: 2339.00 /min
Normed load value: 70.2 %
Vehicle speed: 137 km/h
Coolant temperature: 90 °C
Intake air temperature: 130 °C
Ambient air pressure: 1010 mbar
Voltage terminal 30: 14.260 V
Unlearning counter according OBD: 35
Air mass dynamic during negative increase: error criterion: 0.27 kg/h
Air mass dynamic during positive increase: error criterion: 4.54 kg/h
Air mass dynamic during negative increase: error threshold: 9.00 kg/h
Air mass dynamic during positive increase: error threshold: 4.00 kg/h
Exhaust recirc.valve 1 bank 1: posit.feedback - Act.value: 0.00 %
Exhaust recirc.valve 2 bank 1: posit.feedback - Act.value: 52.73 %
Throttl.valve adapt. 1 bank 1: posit feedback - Act.value: 0.06 %
Readiness: 0 1 0 0 0
Click to expand...
For what it's worth...
 
O

orilius

Member
Joined
Sep 23, 2019
Location
Toronto
TDI
2015 Jetta
I had a similar issue with my '15 Jetta TDI (very much loved and maintained). Car would suddenly and without warning drop rpms for a moment and then recover. This would happen at both low and high speeds and in all gears. Initially suspected DSG or mechatronic issues. Ran diagnostic scanners, replaced filters (oil, air, fuel), replaced fluids, etc. still the issue occurred. Turned out to be a faulty camshaft position sensor. 20K later, not one single hiccup.
 
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