2015 Volkswagen Passat
Mileage
108,994
Service Date
1/18/2023
Services Performed
- MIL is on, Full system code scan: 01-Engine Management U041600
- Invalid Data Received from Vehicle Dynamics Control Module P043F00
- Evaporative Emission System Leak Detection Reference Orifice High Flow P044100
- EVAP Emission Control System Incorrect Purge Flow U112300
- Data-BUS Error Value Received 03-Brake Electronics 00668
- Supply Voltage Terminal 30 Lower Limit Reached 01314
- Engine Control Module Read Trouble Codes 01325
- ECU Tire Pressure Monitoring – J502 No Signal/No Communication 02214
- Tire Pressure Warning Lower Limit Reached 09-Central Electronics 00446
- Function Limitation due to Under – Voltage Lower Limit Reached 01598
- Drive Battery Voltage Open Circuit 15-Airbag – SRS U101100
- Supply Voltage, Voltage Too Low B10B400
- Functional Restriction of Seat Occupied Recognition due to Under voltage 16-Steering Wheel Electronics U140000
- Function Restriction Due To Insufficient Voltage U101100
- Supply Voltage, Voltage Too Low 42-Door Electronics Driver B11EE54
- Motor For Rear Window Regulator, No Basic Setting 52-Door Electronics Passenger B11EE54
- Motor For Rear Window Regulator, No Basic Setting 56-Radio 02635
- Tuner Not Enabled/Activated 00446
- Function Limitation due to Under – Voltage Lower Limit Reached 00532
- Supply Voltage B + Lower Limit Reached 77-Telephone U140000
- Function Restriction Due To Insufficient Voltage 75-Telematics Communication Unit U140000
- Function Restriction, Function Restriction Due To Low Voltage B149AF2
- Mobile Online Services, Remote Control For Vehicle Signaling B1788F0
- Control Module, Immobilizer Deactivated OBDII Codes ($03) P043F
- EVAP System Leak Detection Reference Orifice High Flow OBDII Permanent Codes ($0A) P043F
- EVAP System Leak Detection Reference Orifice High Flow Vehicle battery was charged fully, then sat overnight. Parasitic drain measures 13-20mA, in normal range. Battery tests good, but engine cranked a little slow in the AM. Charging voltage at battery is a little low, at 12.9V at idle with no loads on. Voltage at alternator is >14V. Confirmed headlights and dome lights flicker at idle, worse with more electrical loads on (heated seats, rear defroster). Checked voltage drop from alternator to positive battery terminal, found okay @ 100mv. Voltage drop from engine block to negative battery terminal fluctuates between 700-1800mV, and is over 2.5 volts when cranking, Trace to bad ground connection at the negative cable to body connection. Retaining nut slightly loose, and upon removal found underside of nut and terminal pitted and arced. Also terminal is very hot on thermal camera at idle. File the pitting off the nut, terminal and stud on the body and reassemble with a lock washer. Full load voltage drop is now a steady 250mV with all loads on, and charging voltage at battery is 14.1. Cranking speed now normal and lights not flickering. Most of the fault codes pulled at initial scan are due to low voltage. There are two EVAP system faults that need to be diagnosed separately if customer desires.
Andy N. gave our service a 5 star review on 1/18/2023
