Technical Engine fault codes

[Henliston]

Hi all, I have a 1.4 16v sporting and my engine warning light came on recently. I checked out the codes and it noted both P0350 and P0136 on my OBS2 reader. I changed the camshaft sensor cleared the codes. It ran perfect for about 20 mind the the engine light come back on, the same codes. I have subsequently tried clearing the codes on 2 further occasions each time the engine light will stay of for 15 to 20mind driving.
Can anyone guide me to how the two codes are linked - the car drives fine when the engine light is on.
Thx

 

[cmosfxx]

What made you think the camshaft sensor is the problem? Did you replaced it recently? Recent services?

P0350 is Ignition Coil Circuit Malfunction
P0136 is o2 Sensor Low Voltage

As you see these codes are related.

 

[Henliston]

I had searched via the obd2 reader and the P0350 showed as camshaft sensor.
The car runs smoothly so wouldn’t have thought about coil pack. I couldn’t see a link between the two codes.

 

[Eklipze3k]

Any code with a first digit 0 (ie P0xxx, C0xxx as opposed to P1xxx) is a generic code, and a Google search will reveal the culprit. I'd be looking for a bad earth or poor electrical connection.


FWIW, codes with the first digit 1 or 2 are manufacturer specific and require specialist software (eg. MultiECUScan) to decode and diagnose.

 

[Bernievarian]

P0350 means ignition coil, P0136 means O2 (lambda) sensor … As said a few minutes ago, "0" digit means a generic fault (common to each manufacturer) and in our case "P" means powertrain…

BRs, Bernie

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[aurick86]

Low voltage/circuit low means 3 possible things:
- the circuit has a short (positive wire is touching a ground)
- short inside the sensor (error should go away once the offending sensor is unplugged)
- the positive wire is broken

A short somewhere can cause multiple sensors to error.
Start by checking the positive common wires.

 

[Henliston]

Has anyone got a good wiring diagram of both the ignition coil circuit and the low voltage sensor (lambda sensor) circuit? I replaced the lambda sensor but the fault still comes back after 20mins or so?

 

[Bernievarian]

Is this delay (20') constant ? Have you replaced both sensors ?
Here's some stuff you might find usefull …

BRs, Bernie

If someone here helped You fix -or better, understand- your issue, hit the thanks icon @ bottom right corner, it's free and makes us feel helpy ;-)

edit: lambda sensors are K015 & K017 on the wiring drawing