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[maverick]

Hi all, hope someone can help. just changed the head gasket on my 2.2 auto cd. changed all the valve stem oil seals too, rebuilt and car now running. got 4 error codes though some of which might have been there previously. the engine overall is running well. pretty smoky now over certain revs but it still ( just ) manages to get through the emissions check come mot time 
the tickover is a wee bit lumpy too, the codes I've got are as follows.
 
p0100
p0170
p1781
p1700

any pointers on how to fix whatever's causing these errors ?, at least one of them is bringing on the engine management light. tried clearing the codes but the light comes back on a few seconds later

Brett

[grain.ben]

P0100   Mass Air Flow Sensor Circuit High Input 
P0100   Mass Air Flow Sensor Circuit Low Input
P0170   Rich Exhaust 
P0170   Lean Exhaust 


Cant find the bottom two codes.

Have you plugged in the MAF properly?

P1781 is something to do with the gearbox I think, relating back to the cam sensor, ive had this before

[maverick]

thanks for your reply. I'll recheck the connection to the maf sensor. although the engine does run not too badly apart from the slightly lumpy idle. re-cam sensor. I replaced that quite recently so I would like to think ( hopefully ) that that's not a problem. especially as the sensor for the 2.2 cost me nearly £60, far more than for the 2 litre which unfortunately doesn't fit. different plug.

Brett