Good morning sir. Yesterday a car owner called and drove me to a garage where is car was parked. On getting there, battery from is lexus was pulled out and used for my testing in his Passat.
The car that is faulty is a 2008 Volswagen Passat. The things I noticed when I connected my scantool were: P2014, P0113, P2185 were the check engine codes I saw. But when I checked for modules P0190, P0798, P0864 and P0841 were added previous 3 codes I highlighted 👆.
Before long, about 7 minutes or less during my scan I wanted to crank the engine over to check the live data and the operation of the car unfortunately the battery went low.
Hence, I couldn't carry out more test. In an interview of the car owner about what he used to notice/ symptoms in the car and what was replaced in the car in an attempt to solve the problem. He highlighted that it happened on is way, when the car was on motion and suddenly went off. He allowed the car to cool down for some time. When he tried starting it again it started and moved for some distance and stalled out again.
He invited an electrician to check the cause and fix the problem. The fuel pump was replaced and an actuator as he said but that he can't recall the name at the moment. The car was then driven to a garage where I meet it. Since then they've been trying to fix the problems permanently but to no prevail.
Initially, most of the times the battery will drain out quickly and when car gets hot, the car will go off on motion. But he has not noticed stalling off the car at idle.
Consequently, the engine oil was replaced, top cylinder valves grinded, oil switch, plugs, top gasket and PCM were replaced but the problem was still not fixed.
Moreover it was also noticed that mostly the car will hesitate whenever it wants to climb hill like a popping sound accompanied with that and move very slowly on smooth road.
At present, the man said the car problem have gotten worst, it only cranks but doesn't start anymore.
Please help me out on how to solve the car problems and get the car starting again.
It sound like everything is being caused by low voltage. Your going to have to pull every single fuse and relay and check with multi meter to find the drain. Once you find that out you'll know what the cause is. On till you fix the battery issue you won't know for sure if the cause is something else
German car do not like votage under 12.1 . Once it gets to 11.9 the car will act up and throw codes. If it drops even more the car will start going into a safe mode to keep voltage higher at important components