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Old 12-20-2018, 12:48 PM
  #1  
stl_986
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Default Error codes

Have a 2000 986, 2.7, tiptronic with 101k miles. Car had been running great. Was time for annual inspection & emissions then started to get misfire codes. Misfire codes are gone at the moment, but getting the below codes.

Getting P1340, P0197, P0343

Repalced the following so far:
AOS
upper & lower AOS tubes
oil filler tubes (middle and at engine)
all vacuum lines & connectors
All O2 sensors (was throwing O2 codes over the summer)
air filter
cleaned throttle body
oil filler cap
all new coils, plugs and plug tubes
new battery

I am starting to think that the issue is with wiring since the wiring for cam 1 CPS & oil temp are right by each other. Having some issues with my Durametric, but attached are some readings I got. The oil temp has very wild swings to it which is another indication to me of wiring. whenever I try to activate cam 1 in Durametric the device just stops and turns off.

Other then the above and the car needing a paint job badly it had been great.


Attached Files
File Type: csv
2018_12_19_17_50_01.csv (6.4 KB, 7 views)
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Old 12-21-2018, 07:05 PM
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Macster
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P0197 Oil Temperature Sensor - Short Circuit to Ground.

P1340 Timing Chain out of Position, Bank 1 - Below (or Above) Lower Limit.
P0343 Camshaft Position Sensor 1 – Above Limit
Potential causes:
Short circuit to B+
Check the connector/wiring.
Check signal wire from DME control module, pin III/20, to CMP sensor for short circuit to B+.
1. Connect special tool 9637 to wiring harness ( DME control module connector).
2. Remove connector of CMP sensor.
3. Connect voltmeter to special tool 9637, pin III/20, and ground.
Switch on the ignition.
Display: 0 V
If battery voltage is displayed, check wiring harness for chafing and pinching damage.


Did the behavior/error codes appear out of the blue or after you or someone worked on the car?

Have you checked the wiring over for any rodent damage?

Any water in the doors or in the cabin? Does the ECU (located on the forward bulkhead of the rear trunk) show any signs of water damage?

I'm thinking if no signs of water there is a wiring problem.
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Old 12-21-2018, 07:18 PM
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stl_986
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Haven't tore back into it yet. Going to tonight and tomorrow.

No water damage. took the dme out and opened it. couldn't find any obvious signs of any damage. Not like the old 944's and cold solder joint issues that I have fixed before anyway or any burnt chips.

Is there any way to check the temp sensor at the dme connections such as if shorted? Electrical isn't my strong area but I am not horrible at it. I figure if that is a wiring issue then the cps is definitely also a wiring issue.
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Old 12-21-2018, 09:11 PM
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What does 73 refer to on this page? Is it the DME connector? None of the connectors go up to 73.
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oil temp.pdf (151.0 KB, 11 views)
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Old 12-26-2018, 11:29 AM
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Originally Posted by stl_986 View Post
What does 73 refer to on this page? Is it the DME connector? None of the connectors go up to 73.
Believe the "73" is the pin # of the microprocessor to which the oil temperature sensor connects. The pin is probably an analog input that is routed to the micro's analog to digital peripheral and converts an analog (voltage) signal to a number.
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Old 12-28-2018, 11:27 AM
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Originally Posted by stl_986 View Post
What does 73 refer to on this page? Is it the DME connector? None of the connectors go up to 73.
73 is the pin location on the DME. However, the PDF that you posted is for a '99, the '2000 may be different.
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