Recently, I decided to perform some routine maintenance on my 2015 Vw Gti, opting to replace the spark plugs and ignition coils. I chose high-quality components, specifically:
- OEM NGK RS7 Double Iridium Spark Plugs (OE # 06K905601M)
- Red Top OE 8V RS3 / B9 S4 Ignition Coil Packs
During the installation, I noticed that the D-rings on two of the old coils were quite brittle, almost like sugar glass. This made me realize I’d need to replace all of them soon to prevent future issues caused by heat degradation. I’m now on the lookout for durable aftermarket D-rings that can withstand high engine temperatures – any recommendations would be appreciated!
With the new spark plugs and coils installed, I took my 2015 VW GTI for a 25-minute test drive. Initially, the car felt fantastic, and performance seemed noticeably improved. I was really enjoying the drive, but as I turned onto my street, the dreaded EPC (Electronic Power Control) light illuminated, and the engine stalled. This was definitely not the outcome I was hoping for!
The next day, I used a diagnostic tool to check for error codes again. Surprisingly, the new codes seemed to point towards fueling issues. This made me question if the spark plug and coil replacement was even necessary at this point, although these are wear items and likely needed replacement eventually regardless.
I recall that there was a fuel pump recall for this model of 2015 VW GTI a while back, and I believe there might be another active recall currently. I plan to investigate this further, as a failing fuel pump could certainly explain the symptoms. Alternatively, the problem could be related to the fuel injectors.
I’m now trying to figure out the best way to determine whether the issue lies with the fuel pump or the fuel injectors. Any advice or diagnostic steps that could help pinpoint the root cause would be extremely helpful.
Here are the latest diagnostic trouble codes I retrieved:
Sunday,07,April,2024,19:39:40:31634 VCDS -- Windows Based VAG/VAS Emulator Running on Windows 11 x64 VCDS Version: 23.11.0.0 (x64) Data version: 20231027 DS351.0 www.Ross-Tech.com Dealer/Shop Name: Larry V Home VIN: 3VW447AU9FM079073 License Plate: Mileage: 152043 Repair Order: -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Address 01: Engine Labels: 06K-907-425-V1.clb Control Module Part Number: 5G0 906 259 A HW: 06K 907 425 B Component and/or Version: 2.0l R4 TFSI H13 0006 Software Coding: 091D00124424002F1000 Work Shop Code: WSC 00066 790 00149 ASAM Dataset: EV_ECM20TFS0205G0906259A 001008 (VW37) ROD: EV_ECM20TFS0205G0906259A.rod VCID: 2C5C16AA4770A5F14F-8078 7 Faults Found: 17387 - Monitoring of Fuel Injector for Cylinder 1 P10B1 00 [00101100] - Malfunction Detected Intermittent - Confirmed - Tested Since Memory Clear Freeze Frame: Fault Priority: 2 Fault Frequency: 5 Mileage: 244647 km Date: 2024.03.29 Time: 10:28:32 Engine RPM: 1285.25 /min Normed load value: 21.2 % Vehicle speed: 17 km/h Coolant temperature: 101 C Intake air temperature: 56 C Ambient air pressure: 1020 mbar Voltage terminal 30: 13.535 V Unlearning counter according OBD: 40 Engine: operating status: PL STATE_LS_SAE[1]: CL T_AST_SAE: 26 s MAP_MES_SAE: 75 kPa Lambda probe voltage: bank 1: probe 1 (broadband probe): 1.870 V FAC_TPS_1_SAE: 18.359375 % FUP_H_SAE: 12870.0 kPa 17355 - Injector: Cylinder 1 (N30) P0201 00 [10101100] - Circuit Malfunction MIL ON - Intermittent - Confirmed - Tested Since Memory Clear Freeze Frame: Fault Priority: 2 Fault Frequency: 2 Mileage: 244667 km Date: 2024.03.29 Time: 11:42:03 Engine RPM: 737.50 /min Normed load value: 8.2 % Vehicle speed: 0 km/h Coolant temperature: 104 C Intake air temperature: 52 C Ambient air pressure: 1020 mbar Voltage terminal 30: 11.406 V Unlearning counter according OBD: 40 Engine: operating status: IS STATE_LS_SAE[1]: CL T_AST_SAE: 0 s MAP_MES_SAE: 34 kPa Lambda probe voltage: bank 1: probe 1 (broadband probe): 2.104 V FAC_TPS_1_SAE: 11.718750 % FUP_H_SAE: 8590.0 kPa 15125 - Cylinder 1 P0301 00 [11101101] - Misfire Detected MIL ON - Confirmed - Tested Since Memory Clear Freeze Frame: Fault Priority: 2 Fault Frequency: 2 Mileage: 244667 km Date: 2024.03.29 Time: 11:42:37 Engine RPM: 1891.25 /min Normed load value: 22.4 % Vehicle speed: 26 km/h Coolant temperature: 103 C Intake air temperature: 51 C Ambient air pressure: 1010 mbar Voltage terminal 30: 13.671 V Unlearning counter according OBD: 40 Engine: operating status: PL STATE_LS_SAE[1]: OL_ERR T_AST_SAE: 28 s Engine oil temperature: 109.0 C Lambda probes actual: bank1: 1.2871 FAC_LAM_LIM[1]: 0.000 % FUP_H_SAE: 15280.0 kPa 15131 - Cylinder 3 P0303 00 [11101101] - Misfire Detected MIL ON - Confirmed - Tested Since Memory Clear Freeze Frame: Fault Priority: 2 Fault Frequency: 1 Mileage: 244694 km Date: 2024.04.06 Time: 18:17:15 Engine RPM: 1891.25 /min Normed load value: 22.4 % Vehicle speed: 26 km/h Coolant temperature: 103 C Intake air temperature: 51 C Ambient air pressure: 1010 mbar Voltage terminal 30: 13.671 V Unlearning counter OBD: 40 Engine: operating status: PL STATE_LS_SAE[1]: OL_ERR T_AST_SAE: 28 s Engine oil temperature: 109.0 C Lambda probes actual: bank1: 1.2871 FAC_LAM_LIM[1]: 0.000 % FUP_H_SAE: 15280.0 kPa 15134 - Cylinder 4 P0304 00 [01100101] - Misfire Detected Not Confirmed - Tested Since Memory Clear Freeze Frame: Fault Priority: 2 Fault Frequency: 1 Mileage: 244694 km Date: 2024.04.06 Time: 18:19:21 Engine RPM: 823.75 /min Normed load value: 16.1 % Vehicle speed: 0 km/h Coolant temperature: 105 C Intake air temperature: 58 C Ambient air pressure: 1010 mbar Voltage terminal 30: 14.042 V Unlearning counter OBD: 40 Engine: operating status: IS STATE_LS_SAE[1]: OL_ERR T_AST_SAE: 16 s Engine oil temperature: 107.0 C Lambda probes actual: bank1: 1.2158 FAC_LAM_LIM[1]: 0.000 % FUP_H_SAE: 11130.0 kPa 15128 - Cylinder 2 P0302 00 [01100101] - Misfire Detected Not Confirmed - Tested Since Memory Clear Freeze Frame: Fault Priority: 2 Fault Frequency: 2 Mileage: 244667 km Date: 2024.03.29 Time: 11:42:37 Engine RPM: 1891.25 /min Normed load value: 22.4 % Vehicle speed: 26 km/h Coolant temperature: 103 C Intake air temperature: 51 C Ambient air pressure: 1010 mbar Voltage terminal 30: 13.671 V Unlearning counter OBD: 40 Engine: operating status: PL STATE_LS_SAE[1]: OL_ERR T_AST_SAE: 28 s Engine oil temperature: 109.0 C Lambda probes actual: bank1: 1.2871 FAC_LAM_LIM[1]: 0.000 % FUP_H_SAE: 15280.0 kPa 15137 - Random/Multiple Cylinder Misfire Detected P0300 00 [11101101] - - MIL ON - Confirmed - Tested Since Memory Clear Freeze Frame: Fault Priority: 2 Fault Frequency: 2 Mileage: 244667 km Date: 2024.03.29 Time: 11:42:37 Engine RPM: 1891.25 /min Normed load value: 22.4 % Vehicle speed: 26 km/h Coolant temperature: 103 C Intake air temperature: 51 C Ambient air pressure: 1010 mbar Voltage terminal 30: 13.671 V Unlearning counter OBD: 40 Engine: operating status: PL STATE_LS_SAE[1]: OL_ERR T_AST_SAE: 28 s Engine oil temperature: 109.0 C Lambda probes actual: bank1: 1.2871 FAC_LAM_LIM[1]: 0.000 % FUP_H_SAE: 15280.0 kPa Readiness: 0000 0000 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Address 01: Engine (5G0 906 259 A) 19:42:19 IDE00186 Fuel low pressure: actual value 11.003 bar IDE00188 Fuel high-pressure: actual value 71.7 bar IDE00201 High fuel pressure: specified value 69.0 bar IDE00202 Low fuel pressure: specified value 5.000 bar IDE00476 Fuel Metering Valve 18.66 % IDE01378 Fuel high pressure: control deviation -0.7 bar IDE01975 Numb.of misfir.: cylinder 1 0 IDE01976 Numb.of misfir.: cylinder 2 0 IDE01977 Numb.of misfir.: cylinder 3 0 IDE01978 Numb.of misfir.: cylinder 4 2 IDE03892 Fuel high pressure sensor: unconditioned voltage 1.519 V -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Address 01: Engine (5G0 906 259 A) 19:42:36 IDE00186 Fuel low pressure: actual value 11.003 bar IDE00188 Fuel high-pressure: actual value 68.3 bar IDE00201 High fuel pressure: specified value 68.0 bar IDE00202 Low fuel pressure: specified value 5.000 bar IDE00476 Fuel Metering Valve 21.70 % IDE01378 Fuel high pressure: control deviation -0.1 bar IDE01975 Numb.of misfir.: cylinder 1 0 IDE01976 Numb.of misfir.: cylinder 2 0 IDE01977 Numb.of misfir.: cylinder 3 0 IDE01978 Numb.of misfir.: cylinder 4 2 IDE03892 Fuel high pressure sensor: unconditioned voltage 1.451 V ENG100969 Fuel pump: fuel pressure: I-controller 0.000 % -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Address 01: Engine Labels: 06K-907-425-V1.clb Control Module Part Number: 5G0 906 259 A HW: 06K 907 425 B Component and/or Version: 2.0l R4 TFSI H13 0006 Software Coding: 091D00124424002F1000 Work Shop Code: WSC 00066 790 00149 ASAM Dataset: EV_ECM20TFS0205G0906259A 001008 (VW37) ROD: EV_ECM20TFS0205G0906259A.rod VCID: 2C5C16AA4770A5F14F-8078 7 Faults Found: 17387 - Monitoring of Fuel Injector for Cylinder 1 P10B1 00 [00101100] - Malfunction Detected Intermittent - Confirmed - Tested Since Memory Clear Freeze Frame: Fault Priority: 2 Fault Frequency: 5 Mileage: 244647 km Date: 2024.03.29 Time: 10:28:32 Engine RPM: 1285.25 /min Normed load value: 21.2 % Vehicle speed: 17 km/h Coolant temperature: 101 C Intake air temperature: 56 C Ambient air pressure: 1020 mbar Voltage terminal 30: 13.535 V Unlearning counter OBD: 40 Engine: operating status: PL STATE_LS_SAE[1]: CL T_AST_SAE: 26 s MAP_MES_SAE: 75 kPa Lambda probe voltage: bank 1: probe 1 (broadband probe): 1.870 V FAC_TPS_1_SAE: 18.359375 % FUP_H_SAE: 12870.0 kPa 17355 - Injector: Cylinder 1 (N30) P0201 00 [10101100] - Circuit Malfunction MIL ON - Intermittent - Confirmed - Tested Since Memory Clear Freeze Frame: Fault Priority: 2 Fault Frequency: 2 Mileage: 244667 km Date: 2024.03.29 Time: 11:42:03 Engine RPM: 737.50 /min Normed load value: 8.2 % Vehicle speed: 0 km/h Coolant temperature: 104 C Intake air temperature: 52 C Ambient air pressure: 1020 mbar Voltage terminal 30: 11.406 V Unlearning counter OBD: 40 Engine: operating status: IS STATE_LS_SAE[1]: CL T_AST_SAE: 0 s MAP_MES_SAE: 34 kPa Lambda probe voltage: bank 1: probe 1 (broadband probe): 2.104 V FAC_TPS_1_SAE: 11.718750 % FUP_H_SAE: 8590.0 kPa 15125 - Cylinder 1 P0301 00 [10101100] - Misfire Detected MIL ON - Confirmed - Tested Since Memory Clear Freeze Frame: Fault Priority: 2 Fault Frequency: 2 Mileage: 244667 km Date: 2024.03.29 Time: 11:42:37 Engine RPM: 1891.25 /min Normed load value: 22.4 % Vehicle speed: 26 km/h Coolant temperature: 103 C Intake air temperature: 51 C Ambient air pressure: 1010 mbar Voltage terminal 30: 13.671 V Unlearning counter OBD: 40 Engine: operating status: PL STATE_LS_SAE[1]: OL_ERR T_AST_SAE: 28 s Engine oil temperature: 109.0 C Lambda probes actual: bank1: 1.2871 FAC_LAM_LIM[1]: 0.000 % FUP_H_SAE: 15280.0 kPa 15131 - Cylinder 3 P0303 00 [10101100] - Misfire Detected MIL ON - Confirmed - Tested Since Memory Clear Freeze Frame: Fault Priority: 2 Fault Frequency: 1 Mileage: 244694 km Date: 2024.04.06 Time: 18:17:15 Engine RPM: 1891.25 /min Normed load value: 22.4 % Vehicle speed: 26 km/h Coolant temperature: 103 C Intake air temperature: 51 C Ambient air pressure: 1010 mbar Voltage terminal 30: 13.671 V Unlearning counter OBD: 40 Engine: operating status: PL STATE_LS_SAE[1]: OL_ERR T_AST_SAE: 28 s Engine oil temperature: 109.0 C Lambda probes actual: bank1: 1.2871 FAC_LAM_LIM[1]: 0.000 % FUP_H_SAE: 15280.0 kPa 15134 - Cylinder 4 P0304 00 [00100100] - Misfire Detected Intermittent - Not Confirmed - Tested Since Memory Clear Freeze Frame: Fault Priority: 2 Fault Frequency: 1 Mileage: 244694 km Date: 2024.04.06 Time: 18:19:21 Engine RPM: 823.75 /min Normed load value: 16.1 % Vehicle speed: 0 km/h Coolant temperature: 105 C Intake air temperature: 58 C Ambient air pressure: 1010 mbar Voltage terminal 30: 14.042 V Unlearning counter OBD: 40 Engine: operating status: IS STATE_LS_SAE[1]: OL_ERR T_AST_SAE: 16 s Engine oil temperature: 107.0 C Lambda probes actual: bank1: 1.2158 FAC_LAM_LIM[1]: 0.000 % FUP_H_SAE: 11130.0 kPa 15128 - Cylinder 2 P0302 00 [00100100] - Misfire Detected Intermittent - Not Confirmed - Tested Since Memory Clear Freeze Frame: Fault Priority: 2 Fault Frequency: 2 Mileage: 244667 km Date: 2024.03.29 Time: 11:42:37 Engine RPM: 1891.25 /min Normed load value: 22.4 % Vehicle speed: 26 km/h Coolant temperature: 103 C Intake air temperature: 51 C Ambient air pressure: 1010 mbar Voltage terminal 30: 13.671 V Unlearning counter OBD: 40 Engine: operating status: PL STATE_LS_SAE[1]: OL_ERR T_AST_SAE: 28 s Engine oil temperature: 109.0 C Lambda probes actual: bank1: 1.2871 FAC_LAM_LIM[1]: 0.000 % FUP_H_SAE: 15280.0 kPa 15137 - Random/Multiple Cylinder Misfire Detected P0300 00 [10101100] - - MIL ON - Confirmed - Tested Since Memory Clear Freeze Frame: Fault Priority: 2 Fault Frequency: 2 Mileage: 244667 km Date: 2024.03.29 Time: 11:42:37 Engine RPM: 1891.25 /min Normed load value: 22.4 % Vehicle speed: 26 km/h Coolant temperature: 103 C Intake air temperature: 51 C Ambient air pressure: 1010 mbar Voltage terminal 30: 13.671 V Unlearning counter OBD: 40 Engine: operating status: PL STATE_LS_SAE[1]: OL_ERR T_AST_SAE: 28 s Engine oil temperature: 109.0 C Lambda probes actual: bank1: 1.2871 FAC_LAM_LIM[1]: 0.000 % FUP_H_SAE: 15280.0 kPa Readiness: 0000 0000 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Address 01: DTCs clearedCan anyone offer insights into diagnosing these fuel-related fault codes on my 2015 VW GTI? Specifically, how can I differentiate between a failing fuel pump and problematic fuel injectors? Your expertise would be greatly appreciated!
