Hi guys, I haven’t posted on here for a while but I’m hoping one of you guru’s may be able to assist.
I have a 2004 100 series diesel (5speed box) and for the first time in the 10 years I’ve owned it the engine check light came on whilst towing our caravan, lost power but pulled in and switched off, no light when restarted and drove normally, happened twice on the outward journey then nothing on the return trip. Only happened once since then when solo going up a reasonably steep hill on the motorway but apart from that it drove normally.
Next trip with the tin tent and the same again, light tended to come on when pulling up a hill and again ok on the return trip but by then I’d learnt to drive round it by keeping the throttle as light as poss on the hills, it’s since happened twice when solo on a 100 mile trip on the motorway.
The code is the same each time, P1416 suction control valve, no obvious faults to wiring or connectors so I fitted a new valve and road tested on a suitable motorway hill and the light came back on!
So after more googling I found an old post from 2015 on another group from a guy in Africa with a similar problem, one reply was inevitably to change the valve but the op came back to say he cleaned the maf sensor and it solved the problem!
That got me thinking so I pulled the sensor out (non oe) and compared the resistance readings to a genuine spare that I have, temp readings were similar but the non oe air flow reading was way out so I fitted the oe sensor and road tested again - no check light this time despite two runs up the same hill!
The oe maf sensor resistance readings were 3.88ohms (air flow) and 1.56 (temp) so, what I would appreciate is if anyone can tell me are these readings ok and could a faulty maf sensor throw up a rogue code for a suction control valve?
The next test is the same hill but this time with the tin tent on the back!
I have a 2004 100 series diesel (5speed box) and for the first time in the 10 years I’ve owned it the engine check light came on whilst towing our caravan, lost power but pulled in and switched off, no light when restarted and drove normally, happened twice on the outward journey then nothing on the return trip. Only happened once since then when solo going up a reasonably steep hill on the motorway but apart from that it drove normally.
Next trip with the tin tent and the same again, light tended to come on when pulling up a hill and again ok on the return trip but by then I’d learnt to drive round it by keeping the throttle as light as poss on the hills, it’s since happened twice when solo on a 100 mile trip on the motorway.
The code is the same each time, P1416 suction control valve, no obvious faults to wiring or connectors so I fitted a new valve and road tested on a suitable motorway hill and the light came back on!
So after more googling I found an old post from 2015 on another group from a guy in Africa with a similar problem, one reply was inevitably to change the valve but the op came back to say he cleaned the maf sensor and it solved the problem!
That got me thinking so I pulled the sensor out (non oe) and compared the resistance readings to a genuine spare that I have, temp readings were similar but the non oe air flow reading was way out so I fitted the oe sensor and road tested again - no check light this time despite two runs up the same hill!
The oe maf sensor resistance readings were 3.88ohms (air flow) and 1.56 (temp) so, what I would appreciate is if anyone can tell me are these readings ok and could a faulty maf sensor throw up a rogue code for a suction control valve?
The next test is the same hill but this time with the tin tent on the back!
