C5 2litre Hpi 2001 80k

[coastline taxis]

car came in with owner saying it was running rough with engine light on and has been on for 3 months and only now decided to get it sorted. so plugged in and got the following

p 0301 cylinder 1 misfire detected

p1162 cant find any info on it

p0485 engine coolant blower power/earth circuit malfunction

p1457 cant find any data

p0131 heated oxygen sensor low voltage

 

Could this be a wiring issue or the domino effect if so any ideas as to where to start.funny thing though the car runs perfect and given good mpg just troublesome at junctions and tickover

[techbod]

P1457 Unable To Pull Vacuum In Tank good place to start

 

p1162 Exhaust gas recycling Coherence.

 

this bit copied from another site P0485

 

Hi Mark

Sounds feasible In my case, as it's Summer, the factor of the heater going cool wouldn't have been detected.

 

All the ramps are busy at the moment, so I only had a look whilst it was on the ground.

I followed heater hose diameter pipes disappearing under the battery tray, going over the top of the autobox. I can just about make out, that they are attached to a box bolted to the back of the gearbox (above N/S inner CV joint)

 

You say that you have found the heat exchangers were blocked. - How did you remedy the problem??

Hose pipe flush, or replacement??

 

If it has to be removed - how??

Remove battery and do it from the top??

 

Is it just piggy backed to the gearbox, or is there likely to be further complications - oil loss - gaskets required??.

 

P0131 sounds like a false reading and probably caused by the other faults ;)

[techbod]

funny thing though the car runs perfect and given good mpg just troublesome at junctions and tickover

 

just been thinking of this one and a picture is developing which seems to be happening to hdi/hpi engines and a common one, the fact there are many fault codes is a good thing because it points to one thing as in the domino effect and this is a perfect example and my theory is a sticking EGR valve purley because it effects fuel pressure while in low revs like at waiting at traffic lights?

[coastline taxis]

funny thing though the car runs perfect and given good mpg just troublesome at junctions and tickover

 

just been thinking of this one and a picture is developing which seems to be happening to hdi/hpi engines and a common one, the fact there are many fault codes is a good thing because it points to one thing as in the domino effect and this is a perfect example and my theory is a sticking EGR valve purley because it effects fuel pressure while in low revs like at waiting at traffic lights?

Would it be worth pulling the egr of and cleaning it out then as with all these faults its got to be just one thing causing it or am i going down the wrong path here and that there is more than one fault

[techbod]

yes pull the EGR valve and clean it and watch the results, the EGR valve is well known in the car sector for causing strange faults like this and only recently one came up on here about the fuel pump and I checked it out and results came up with the EGR valve but pointed to the fuel pump and when they cleaned the EGR valve out it sorted the problem ( that was a very big saving ) ;)