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Discussion Starter #1
Vickie is being a real bitch. :banghead:

She's a 2001 VW Passat 1.8t AUG manuel who is throwing out codes p0012 and p0010. This isn't the first time.

Last June I began randomly losing power as I drove... it progressively got worse (one a week, to daily) until finally the car would not start at all. I replaced the camshaft position sensor and the ECU and BAMB, Vickie started right up. She ran well, maybe a little less power, but strong enough to get me from Dallas to Phoneix. Broke down again the day after returning to PHX.

So I replace the sensor again, and it doesn't work. There is an oil leak behind the sensor (leaky cam seal i presume). Test the battery, starter, and fuel - all working fine. I tested the wiring, it's showing voltage. The ECU is new, the sensor is new, and for some reason I am still unable to start. I experimented with starting fluid, was able to get it started for a moment, only for it to die within 10 seconds. The car cannot currently retain power - or even get started to begin with.

I have no idea what to do anymore. Any guidance would be appreciated because otherwise, I'm going to have to start exploring insurance scams.
 

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I'm married to a Vickie, I know they can be a challenge. But seriously, your description would point me to fuel pressure. How did you "test" the fuel? Do you know whether the fuel pump is running? Is there enough pressure to make the fuel pressure reguator emit a hissing sound when the pump is running? You say the CPS "doesn't work". Do you mean no signal? Or no improvement?
 

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I guess that makes sense... in terms of the test, I mean it's actually good fuel (put it in a lawn mower lol). And by CPS not working, I meant that the new one did not solve the problem as it did previously.

If it is the fuel pump though, why would I still be getting the p0012/p0010 codes?
 

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It's a 17 year-old car, often there are simultaneous faults. The trick is to logically solve the primary fault without being fooled by symptoms of the secondary fault.
 

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I'm married to a Vickie, I know they can be a challenge. But seriously, your description would point me to fuel pressure. How did you "test" the fuel? Do you know whether the fuel pump is running? Is there enough pressure to make the fuel pressure reguator emit a hissing sound when the pump is running? You say the CPS "doesn't work". Do you mean no signal? Or no improvement?
Fuel pumps are a known weak spot, particularly a couple of model years after our 2001 AUG engines. It wouldn't hurt to swap out the fuel filter first, to see if that helps any.
 

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Not the fuel filter, it's electrical. I had several CCT codes that came from a bad power supply relay, but I also had throttle body codes with them. I would start with checking the wiring between the CPS and the ECU, you might have a cracked wire.
 

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The CPS appears to be working, check the Cam adjuster, its solenoid and its wiring.
Check the oil pressure. This shouldn't prevent starting.

16396/P0012/000018 - Ross-Tech Wiki
16396/P0012/000018 - Bank 1: Camshaft A (Intake): Advance Setpoint not Reached (Over-Retarded)
Possible Symptoms
Erratic Idle
Possible Causes
Intake Camshaft Adjuster tight/stuck
Intake Camshaft Adjuster faulty
Possible Solutions
Check Intake Camshaft Adjuster
When the Intake Camshaft Adjuster uses oil pressure to control the adjuster, check the oil pressure. The 1.8T is notorious for issues but any engine with low oil pressure or restrictions in the system could result in various timing DTC's such as 17748/P1340/004928.
Use Output Test, Meas. Value Blocks (MVB) & Basic Setting


Check fuel supply etc. It is NOT the fuel filter.
 

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Discussion Starter #8
Wish I would have read those earlier. WAS NOT FUEL FILTER. Still only getting the P0012 code - Retarded timing belt. I'm getting all crank no start. Now that I think about it, I previously had throttle body codes when everything began. It was the first thing I replaced - the camshaft sensor came a few weeks afterward.

Can someone describe how the oil pressure interacts with the camshaft? I'll check wires and oil again. Would the low oil pressure totally prevent the car from starting? It seems like the camshaft adjuster is the issue.

I replaced two relays as well. I cannot remember exactly which ones... will update.
 

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Can someone describe how the oil pressure interacts with the camshaft? I'll check wires and oil again. Would the low oil pressure totally prevent the car from starting? It seems like the camshaft adjuster is the issue.
You probably know that the chain's path between the exhaust cam sprocket and the intake cam sprocket can be lengthened or shortened, depending on the position of those chain pads. A force is necessary to move the adjuster, and pressurized oil is the convenient source for that. But the range of intake cam timing relative to the exhaust cam is limited, and can't be enough to prevent the engine from starting.
 

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Oil pressure problems won't prevent starting.
I don't believe that a faulty CPS can prevent starting, so forget about it for now.

Does the fuel pump run while the engine is cranking ?
If it doesn't run don't replace it or any parts until further testing shows where the fault lies.
 
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