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Old 16-06-17, 07:58 AM   #1
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Default PO343 - Camshaft Postition Sensor A High

Hello everyone.

First time posting on the forum in an attempt to help my mate with his 207. I am no mechanic.. just armed with a cheap code reader and everyone's mate Google.

Peugeot 207 1.6 GT 57 plate, 57K

He is having trouble with it starting. Turns over nice and strong but takes a good 10-15 second before she fires up. Pumping the throttle tends to help the situation. Once running the engine sounds nice and smooth but he says it feels very sluggish and underpowered.

Code reader throw up code PO343 - Camshaft position Sensor.

He tells me the sensor was replaced around a six months ago which didn't solve the issue but has just lived with it until now.

I measured the sensor and incoming loom yesterday and found the following (attached image).

I have since done some googling and it would appear that for some reason I have got volts on the sensor output pin... which I would suggest accounts for the ECM thinking the Cam sensor is pulling high.

Can someone please confirm the reference voltage for this sensor and the pin out configuration??


One other point of note. The de-pollution warning comes on the other dash but doesn't give a stored DTC? Could a problem with the DPF system cause a false high reading on the Camshaft sensor?

ECM locking the CMP sensor to a high level to throw additional fuel into the system trying to regen the DPF?

Any help would be greatly appreciated.

Thanks
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cam-shaft-sensor-readings.jpg  
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Old 16-06-17, 09:25 AM   #2
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P0343 isn't camshaft position sensor. It's Inlet cylinder reference sensor signal fault.

The thp engines have some slightly different code descriptions that appear from generic code readers.

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Old 16-06-17, 09:58 AM   #3
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ADS77 thank you for the reply.

I shall do some more googling around this instead then.

For clarification the sensor I have been looking at and took the measurement is in the top right corner of the head. Top yellow circle in the attached circle.
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207turbo01.jpg  
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Old 16-06-17, 09:59 AM   #4
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Tbh google can be ur worst enemy sometimes lol

Am on holiday this now but home Sunday so will see if for info for that code.

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Old 16-06-17, 10:02 AM   #5
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You're not wrong...

Thank you for the help.
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Old 16-06-17, 12:44 PM   #6
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Quote:
Originally Posted by Jolley View Post
You're not wrong...

Thank you for the help.
So back from holiday and checked for the code via a contact at Peugeot, BUT
Is it the petrol GT as am guessing it is cause of the pic you put up, or is it diesel cause u mentioned DPF?

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Last edited by ADS77; 18-06-17 at 09:12 PM.
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Old 19-06-17, 08:41 AM   #7
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Petrol.

Sorry that was my mistake getting confused between a few things.

Didn't get chance to pick up on this over the weekend but will be back onto it this week.

Thanks
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