Question about 1999 Ford F350 Regular Cab
P1212 -ICP voltage not at expected level
P01238 is not a code, too many numbers, if it is p1283 then it is an IPR circuit failure.
The IPR is probably your problem, even with a non working backpressure sensor your truck should run fine. I isn't needed except for the EBPV to operate during warm-ups.
Replace your IPR (injection pressure regulator)
Posted on Oct 01, 2009
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Posted on Jan 02, 2017
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