Cam position sensor codes after doing timing belt. Won't start. HELP!
02-24-2009, 09:41 PM
#1
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Cam position sensor codes after doing timing belt. Won't start. HELP!
Just finished doing the timing belt and valve cover gaskets, etc. Friekin' thing won't start.
2002 S4, tip., 99k miles.
After "finishing" I cranked it with the fuel pump fuse pulled to get some oil flowing again. Replaced the fuse and it won't start. I get the codes below.
My best guesses:
-Bent reluctor ring.
-Cam chain off by a tooth.
-Flywheel reluctor / sensor (per STFA) - doesn't make much since though since no work was done down there.
-Water / coolant from spill f'ed up the driver's side sensor - LONG SHOT since there wasn't that much spillage and it didn't look wet.
For piece of mind, I confirmed that the reluctors only go on the ends of the cams one way.
Results of 3 scans below....
Scan with both sensors plugged in.
Address 01: Engine Labels: 078-907-551-AZA.lbl
16730 - Camshaft Position Sensor (G163): Implausible Signal
P0346 - 35-00 - -
16725 - Camshaft Position Sensor (G40): Implausible Signal
P0341 - 35-00 - -
___________________________________________
with passenger side reluctor disconnected
16730 - Camshaft Position Sensor (G163): Implausible Signal
P0346 - 35-00 - -
17746 - Camshaft Position Sensor (G40): Open or Short to Plus
P1338 - 35-00 - -
___________________________________________
With Driver side reluctor disconnected
17800 - Camshaft Position Sensor Bank 2 (G163): Open Short to Plus
P1392 - 35-00 - -
16725 - Camshaft Position Sensor (G40): Implausible Signal
P0341 - 35-00 - -
2002 S4, tip., 99k miles.
After "finishing" I cranked it with the fuel pump fuse pulled to get some oil flowing again. Replaced the fuse and it won't start. I get the codes below.
My best guesses:
-Bent reluctor ring.
-Cam chain off by a tooth.
-Flywheel reluctor / sensor (per STFA) - doesn't make much since though since no work was done down there.
-Water / coolant from spill f'ed up the driver's side sensor - LONG SHOT since there wasn't that much spillage and it didn't look wet.
For piece of mind, I confirmed that the reluctors only go on the ends of the cams one way.
Results of 3 scans below....
Scan with both sensors plugged in.
Address 01: Engine Labels: 078-907-551-AZA.lbl
16730 - Camshaft Position Sensor (G163): Implausible Signal
P0346 - 35-00 - -
16725 - Camshaft Position Sensor (G40): Implausible Signal
P0341 - 35-00 - -
___________________________________________
with passenger side reluctor disconnected
16730 - Camshaft Position Sensor (G163): Implausible Signal
P0346 - 35-00 - -
17746 - Camshaft Position Sensor (G40): Open or Short to Plus
P1338 - 35-00 - -
___________________________________________
With Driver side reluctor disconnected
17800 - Camshaft Position Sensor Bank 2 (G163): Open Short to Plus
P1392 - 35-00 - -
16725 - Camshaft Position Sensor (G40): Implausible Signal
P0341 - 35-00 - -
02-25-2009, 05:40 AM
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With both sensors reading off, you probably have the timing off.
Remove and reinstall the timing belt and make sure cyl-3 is at TDC (install the crank locking pin). Use the cam bar to align the cams and properly tension the belt.
Pray that it wasn't off enough to bend valves.
Pray that it wasn't off enough to bend valves.
02-25-2009, 06:06 AM
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I used the bar and pin. Maybe one tooth off on an intake cam? 8 (outer) links between cams?
<ul><li><a href="https://forums.audiworld.com/s4/msgs/2220579.phtml">link to cam chain pic</a></li></ul>
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