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Did you verify the sensors were faulty before you replaced them ? Code 1345 means the signal from each sensor is not in sync with the other. That means one sensor signal is out of sync, or there is a problem with the timing chain.
Codes 171 and 174 deal with the issue of the fuel system being too lean on both banks or heads. You could have compression or fuel problems that would cause those codes.
A mechanic would use a scanner to monitor data from the sensors and try to figure out whats going on.
error code p1345 ( gm and chevy) = camshaft and crankshaft position error code. a tooth or timing chain has excessive wears. BMW error code P1345 = cylinder 2 misfires, fuel cut off. all of it, cause the engine lose power.
P1345 is "Crankshaft position sensor / Camshaft position sensor correlation"
Code P1345 determines if the distributor is installed incorrectly, or
if a mechanical malfunction is present in the engine. The light will
trigger when the engine is running and the camshaft sensor reference
pulse is not detected at a correct relative position with the crankshaft
pulse. Most likely causes for this Chevy check engine light code
include a faulty crankshaft position sensor, a wiring concern or an
improperly installed distributor. A quick check on the crankshaft sensor
is to monitor the RPM value with a scan tool while revving up the
engine. If the reading is close to twice the expected RPM, then the
sensor is likely faulty. There are other less likely concerns possible,
such as base engine or computer related issues, but these involve more
in depth testing. I hope this information is useful.
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