Peugeot Forums banner

1 - 12 of 12 Posts

·
Registered
Joined
·
16 Posts
Discussion Starter #1
Hi.

I have a 54 plate 2.2 auto SW. For the past month, depollution system fault has come up sometimes then after 4 starts it would clear. Now its constantly on.

Do you need to use planet or will bosh diagnostic equipment work? Peugeot in Scunthorpe wanted £69.95 +vat to do the check.

The car runs normal, no limp mode / loss of power.

Any ideas on what the issue could be?

David
 
C

·
Guest
Joined
·
0 Posts
I would think the bosch kit should work, I've seen snap on gear read codes on mine before. Planet is usually best as it has found things on my car other diagnostic gear hasn't.

£70 plus quid for a diagnostic scan daylight robbery, I charge £10 for global scan.
 

·
Registered
Joined
·
16 Posts
Discussion Starter #3
Went to a friends garage, got the error code of PO105. Inlet manifold pressure signal.

He was really busy at the time. Anyone know what part I need or what is faulty

David
 

·
Registered
Joined
·
16 Posts
Discussion Starter #4
Went to a friends garage, got the error code of PO105. Inlet manifold pressure signal.

He was really busy at the time. Anyone know what part I need or what is faulty

David
 

·
Registered
Joined
·
9,733 Posts
Went to a friends garage, got the error code of PO105. Inlet manifold pressure signal.

He was really busy at the time. Anyone know what part I need or what is faulty

David
This might help who ever reads this and knows of this fault -

P0105 Generic Manifold Absolute Pressure/BARO Circuit

The Powertrain Control Module (PCM) uses the Manifold Absolute Pressure Sensor (MAP) to monitor engine load. (NOTE: Some vehicles have a Barometric Pressure (BARO) sensor that is integral to the Mass Air Flow (MAF) sensor and do not have a MAP sensor. Other vehicles have a MAF/BARO and a redundant MAP sensor where the MAP sensor functions as a backup input in case of MAF failure.) The PCM supplies a 5 Volt reference signal to the MAP sensor. Usually the PCM also supplies a ground circuit to the MAP sensor as well. As the manifold pressure changes with load, the MAP sensor input informs the PCM. At idle the voltage should be 1 to 1.5 Volts and approximately 4.5 Volts at Wide Open Throttle (WOT). The PCM looks for any change in manifold pressure to be preceded by a change in engine load in the form of changes in throttle angle, engine speed, or Exhaust Gas Recirculation (EGR) flow. If the PCM doesn't see any of these factors change while detecting a rapid change in MAP value,

Causes

could be caused by:

Bad MAP sensor
Water/dirt intrusion affecting MAP sensor connector
Intermittent open in the reference, ground, or signal wire for the MAP sensor
Intermittent short in the reference, ground, or signal wire for the MAP sensor
Ground problem due to corrosion causing intermittent signal problem
A break in the flexible air intake duct between the MAF and the intake manifold
Bad PCM (do not assume the PCM is bad until you've exhausted all other possibilities)

Possible Solutions

Using a scan tool, watch the MAP sensor value with the key on, engine off. Compare the BARO reading with the MAP reading. They should be roughly equal. The voltage for the MAP sensor should read approx. 4.5 volts. Now start the engine and look for a significant drop in the MAP sensor voltage indicating the MAP sensor is working.

If the MAP reading doesn't change perform the following:

With the Key on, engine off, disconnect the vacuum hose from the MAP sensor. Using a vacuum pump, pull 20 in. of vacuum on the MAP sensor. Does the voltage drop? It should. If it doesn't inspect the MAP sensor vacuum port and vacuum hose to manifold for a restriction of some kind. Repair or replace as necessary.
If there are no restrictions, and the value doesn't change with vacuum, then perform the following: with the Key on and engine off and the MAP sensor unplugged, check for 5 Volts at the reference wire to the MAP sensor connector with a Digital Voltmeter. If there is none, check for reference voltage at the PCM connector. If the reference voltage is present at the PCM connector but not the MAP connector, check for open or short in the reference wire between MAP and PCM and retest.
If reference voltage is present, then check for existing ground at the MAP sensor connector. If it isn't present then repair open/short in the ground circuit.
If ground is present, then replace MAP sensor.
 

·
Registered
Joined
·
16 Posts
Discussion Starter #6
And I thought it would be just a simple change of sensor. Been having depollution system faulty coming up intermittent for about a month. But it use to clear on the forth start.

Well it does clear, i could sit at idle and rev a little, but ad soon as I drive about 50 yards depollution system faulty comes up
 

·
Registered
Joined
·
16 Posts
Discussion Starter #7
well I sorted the depollution issue by trading the car in.

Shame the Peugeot I bought must of been a Friday afternoon car
 

·
Registered
Joined
·
16 Posts
Discussion Starter #12
Why that response? They have a 5 year warranty, the previous model had hardly any issues. Mostly just a ABS tone ring would crack after about 60k £30 to fix. The dealer even told me this.

All I can say is I'm very please with my purchase, and it looks like I won't be visiting the garage as often now.

All I can say about peugeot is, they make great cars when they work.
 
1 - 12 of 12 Posts
Top