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low voltage to crank shaft pos. sensor

5651 Views 8 Replies 3 Participants Last post by  squeebug
I need advice please. It's a 2002 vw new beetle. walked out from work and it wont start. My codes coming up are P0342 - low voltage to crank shaft pos sensor. (2.5v needs 5.0) my second code is P0135 (o2 heater circuit) no check engine light and no other warning lights on the dash. took it to a repair shop who is telling me those are ghost codes and it's really jumped time and bent valves. I do not believe them! help please
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16726/P0342/000834 - Ross-Tech Wiki

P0135 Volkswagen HO2S11 Sensor Heater Circuit OBDII Engine Light Trouble Code | Engine-Codes.com

Anything is possible; first of all: what engine and transmission are we talking about? Please fill in your profile info; that way, we can help you more intelligently. (e.g. year, model, engine and transmission)
we are talking about a 2002 vw new beetle, 2.0l with automatic transmission. The car drove fine to work, never had a issue with anything. so i do not see how it could jump time and bend my valves while it was parked sitting outside all day. Sorry I did not fill the information out faster, its kind of sunny out here.
Well, the first thing to do; is to check and see, if your timing marks line up. If they do not; then, I would inspect the timing belt and see if it is damaged. Many times; the timing belt will get damaged, because something in the belt path has failed (water pump, pulleys, tensioner, etc.). You would want to fix those issues and then you could do a compression test. If the compression is zero; then, you have bent valves. At that point; the head would need to come off and it would need to be repaired or replaced. Put everything back together with a new timing belt/waterpump kit, head bolts, head gasket, (anything else you need) and then, you would be back on the road.

timing belt replacement and timing marks alignment:

Volkswagen Workshop Manuals > New Beetle GLS L4-2.0L (AZG) (2002) > Maintenance > Timing Belt > Component Information > Service and Repair > Procedures

compression test; specs and procedure:

Volkswagen Workshop Manuals > New Beetle GLS L4-2.0L (AZG) (2002) > Maintenance > Tune-up and Engine Performance Checks > Compression Check > System Information > Specifications

Here is a excellent thread; showing what is involved in replacing the head:

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yes, i have pulled back the timing belt cover and verified that the belt is on and no gears are lose or missing. The repair shop here i am standing in front of just doesn't want to work on my car or the lady that just brought in her car. they are just telling that to us to make us leave so again I ask, why do I have code P0342 and would that prevent the car from running? can my code p0135 cause this low voltage to make code p0342 to appear and make the car not run?(i said what i did about the mechanics here at craigs only because i over heard him say, we do not have time for it, just tell her 4,000 to fix it and maybe she will leave)
Well, as I said; you need to do some testing and checking to see what is wrong. If all the timing marks are correct, the timing belt isn't damaged and you have good compression, then the sensor may or may not be bad. You could also; check and see if you are getting spark, at your spark plugs. If you are not getting spark; then, the camshaft position sensor, could be bad or wiring is bad or the timing is off.

16726/P0342/000834 - Camshaft Position Sensor (G40): Signal Low

Possible Symptoms
Malfunction Indicator Light (MIL) active

Possible Causes
Wiring from/to Camshaft Position Sensor (G40) faulty
Camshaft Position Sensor (G40) faulty
Timing misaligned

Possible Solutions
Check Wiring from/to Camshaft Position Sensor (G40)
Check Camshaft Position Sensor (G40)
Check Timing

The P0135 Volkswagen - HO2S11 Sensor Heater Circuit issue; is unrelated to the "no start" problem. Part of the 02 sensor is bad; the "heater circuit", that problem would require a new 02 sensor to be fixed. I would deal with that; after you find out, why your car isn't starting.
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ok. thank you. I have it being towed home now. will run a compression test when i get there and get back to you. wiring harness was replaced 2 yrs ago. did just change all the parts in the drivers door recently. locking systems working but sunroof likes to open and close randomly. not every time but some times when opening the drivers door you can hear a motor run under the dash.
Ok, check your timing belt, compression, ignition spark and we can go from there. :cool:
Moved to 2.0 forum.
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