P1397 camshaft bank 2 position sensor

[Dan Novreske]

Car was in accident 7 years ago and not started since.   Driver side front damage and now will not start.  Fault code 1397 camshaft position sensor is active, checked and have 5v and ground at sensor connector so replaced sensor, reset code, still no start and 1397 is active again.  

Because power and ground is at sensor fairly certain wire harness is good between engine computer and sensor.  Any thoughts on next steps, internal engine issue???

[DBJoe996]

A quick Google search for P1397 got this

And you need to check your wiring harness for rodent damage.  Depends on where it was sitting for 7 years, but it is entirely possible that something has  chewed up your wiring....somewhere.

Edited May 10, 2020 by DBJoe996

[Dan Novreske]

1 hour ago, DBJoe996 said:

A quick Google search for P1397 got this

And you need to check your wiring harness for rodent damage.  Depends on where it was sitting for 7 years, but it is entirely possible that something has  chewed up your wiring....somewhere.

Thanks DBJoe996, pretty sure the harness is good because I have 5 volts and ground at the sensor.  

[JFP in PA]

2 hours ago, Dan Novreske said:

Thanks DBJoe996, pretty sure the harness is good because I have 5 volts and ground at the sensor.  

 

Sure, but what about the wire that carries the signal from the sensor to the DME, which is reading a strange value?

[Dan Novreske]

Ok, checked continuity of the 3 wires between camshaft position sensor 2 (hall sensor) and DME, all three are good.  No shorts to ground, no shorts to each other.  The wires harness and connectors look nice probably not touched since car was built.

 

What do you think, timing chain issue?  Should next step be check timing or something else?

[JFP in PA]

I would be checking the output readings (cam angles and deviation values) from the sensor to see what it is telling the DME.

[Dan Novreske]

1 hour ago, JFP in PA said:

I would be checking the output readings (cam angles and deviation values) from the sensor to see what it is telling the DME.

Engine only cranks, no start and backfires on drivers side.  Will I even get output readings during crank?  Does removing the green plugs allow me to visually see timing marks to determine if good or bad?

[JFP in PA]

A Porsche specific scan tool should see something during crank over.  Removing the cam plugs will give you an approximation of the cam positions, but there are no marks, only the slots the cam bollocking tool fits into, which should be exactly vertical when the engine is at TDC:

 

[Dan Novreske]

9 hours ago, JFP in PA said:

A Porsche specific scan tool should see something during crank over.  Removing the cam plugs will give you an approximation of the cam positions, but there are no marks, only the slots the cam bollocking tool fits into, which should be exactly vertical when the engine is at TDC:

 

Thanks JFP in PA, I will check this out over the weekend.  I have a Autel generic scan tool.  Maybe I will get the Durametric tool if it looks like this engine is not catastrophic failure.  Engine has <45,000 miles.  

[Lucio]

Hi everyone,
has anyone the measures of the 3 chain camshaft locking tool?

Thanks!

 

L.