2005 Cadillac CTS Fault codes P0343 & P0367

Tiny
M VEALE
  • MEMBER
  • 2005 CADILLAC CTS
Electrical problem
2005 Cadillac CTS 6 cyl Two Wheel Drive Automatic 20 mls miles

I am in the UK. And I have a CTS 2005 3.6 which is showing these codes;
P0343 Camshaft position sensor A, circuit high.
P0367 Camshaft position sensor B, circuit low.
The engine runs perfectly and the codes can be cleared but reappear after the second time of re-starting. It can't be mechanical as it's never been registered yet and done only 20 miles.
What is the actual position of these 2 sensors and have you any ideas on this fault. There seem to be 3 sensors at the front of each cam - it's a VVT engine.
Regards,
Michael
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Tuesday, April 27th, 2010 AT 11:12 AM

6 Replies

Tiny
FACTORYJACK
  • EXPERT
There are actually two sensors, and two solenoids per bank. All of which are interchangeable. It is odd that you have a high voltage and a low voltage code setting. The sensors are for bank 1, which is the RH(passenger) side of the engine. As you say, it should not have mechanical issues, it should also not have wiring issues, at this stage. Aside from circuit testing to try and narrow it down, you can swap the sensors(sensors are 3-wire/solenoids are 2) from bank to bank and see what happens, see if your codes change to bank 2. All four sensors have two things in common, they share the same 5V reference from the ECM, and they share the same low reference(ground), also from the ECM. They do have independent signal circuits. You could have faulty sensors, a faulty ECM, or circuitry. The fact that both codes reset at the same time, it would be hard to suspect sensors, but that swapping is the easiest place to start.
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Tuesday, April 27th, 2010 AT 11:10 PM
Tiny
M VEALE
  • MEMBER
Hi gstacey,
As advised we swapped the sensors, 1 with 4 and 2 with 3, if you number them 1 to 4 from the RH side. The codes new read;
P0348, Sensor A circuit high &
P0392, Sensor B circuit low. So they've changed.
Indicating it's the sensors at fault. I'm puzzled though, as to why the description remains exactly the same. Shouldn't it now refer to sensors C & D at fault, as they are now on the other side? Or does the fault code give you more information than I can see on a simple diagnostics check?
Thanks for your help.
Regards,
Michael
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Saturday, May 1st, 2010 AT 9:32 AM
Tiny
M VEALE
  • MEMBER
Hi gstacey,
I don't know if you raceived my reply to your suggestions, on May 01. We swapped the sensors over, left to right, and then got new fault codes P0348 and P0392, indicating the sensors are faulty. I'm just unsure why they are still described as ' sensor A high' and 'sensor B low' when they are now on the other side.
Also, do you know who could supply them to me directly.
Regards,
Michael
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Wednesday, May 5th, 2010 AT 6:52 AM
Tiny
FACTORYJACK
  • EXPERT
They are numbered that way, it may have something to do with consistency standards among makes. There is a Bank 1 Sensor 1 and 2, and there is a Bank 2 Sensor 1 and 2. Bank 1 is always the bank with #1 cylinder in it. The sensors may be available at aftermarket parts sources, I am not sure. A GM dealer should be able to obtain them, either from dealer stock, or ordered from a warehouse.
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Thursday, May 6th, 2010 AT 12:30 AM
Tiny
M VEALE
  • MEMBER
Hi gstacey,
Thanks for your reply on May 5. I'm sorry to trouble you again, but these sensors are quite expensive and before I order them I just want to clarify something - if you'll bear with me. Considering the way i've described the fault codes, and the numbers they changed to after the sensors were swapped, am I right in saying that it must be the RH side(passenger in the US) sensors that are faulty, and can't be anything else. In other words, do the first 2 codes signify faulty RH sensors, and the second 2 codes signify faulty LH sensors? It just seems extraordinary for both to fail on a car with virtually no mileage.
Thanks again'
Michael
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Thursday, May 6th, 2010 AT 12:44 PM
Tiny
FACTORYJACK
  • EXPERT
I did a little more research, and I was a bit incorrect on the description. They are listed as Bank 1 Intake sensor, Bank 1 Exhaust sensor, and Bank 2 Intake sensor, Bank 2 Exhaust sensor. Each is respective to the camshaft it is responsible for. If you swapped the Bank 1 Intake sensor with the Bank 2 Intake sensor, the code would have changed from P0343 to 348, and the same with exhaust sensors, the codes would have changed from P0367 to P0392. You are correct in it being the RH side, I have attached an illustration to show the layout. Try swapping the position of the sensors on the RH side only, the expected result should be a P0347 Bank 2 intake low, and P0393 Bank 2 exhaust high. This would confirm sensors.

CMP Sensors and CMP Actuator Solenoids


http://www.2carpros.com/forum/automotive_pictures/309872_868189_1.jpg



(1) Camshaft Position (CMP) Sensor - Exhaust Bank 1
(2) Camshaft Position (CMP) Actuator Solenoid - Exhaust Bank 1
(3) Camshaft Position (CMP) Actuator Solenoid - Intake Bank 1
(4) Camshaft Position (CMP) Sensor - Intake Bank 1
(5) Camshaft Position (CMP) Sensor - Intake Bank 2
(6) Camshaft Position (CMP) Actuator Solenoid - Intake Bank 2
(7) Camshaft Position (CMP) Actuator Solenoid - Exhaust Bank 2
(8) Camshaft Position (CMP) Sensor - Exhaust Bank 2
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Thursday, May 6th, 2010 AT 11:28 PM

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