No CEL, but I pulled codes today (airbag light was on after wife adjusted seat...I can deal with that)

17748 - Camshaft Position Sensor (G40) / Engine Speed Sensor (G28): Incor. Correlation
P1340 - 35-10 - - - Intermittent

17536 - Fuel Trim; Bank 1 (Mult): System too Lean
P1128 - 35-10 - - - Intermittent

I cleared codes to see what comes back...I'll run tests on 17536
About 2 months ago, I had a CEL and 17536/P1128 code - replaced MAF, showed normal readings and CEL never came back.

Any thoughts on 17748?

17748/P1340/004928 - Camshaft Position Sensor (G40) / Engine Speed Sensor

(G28): Incor. Correlation
Possible Causes
Timing Belt/Chain incorrectly installed
Timing Chain probably lengthened
Camshaft Position Sensor (G40) faulty
Engine Speed Sensor (G28) faulty
Possible Solutions
Check Timing Belt/Chain installation
Use Measuring Value Blocks (MVB) to Check Timing Chain
Check/Replace Camshaft Position Sensor (G40)
Check/Replace Engine Speed Sensor (G28)

Timing belt was done @2 years ago...how do I use MVB to check timing belt?