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DTC P0606
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Re-check your installation work. You likely have an air leak after the MAF.
After installing a SRI, you should disconnect the battery to clear the previously learned adaptive fuel strategy settings and let the car idle for a few minutes after restarting.

DTC Code details:

P0171 - System too Lean (Bank 1) The Adaptive Fuel Strategy continuously monitors fuel delivery hardware. The test fails when the adaptive fuel tables reach a rich calibrated limit. For lean and rich DTCs:

Fuel system:
Excessive fuel pressure.
Leaking/contaminated fuel injectors.
Leaking fuel pressure regulator.
Low fuel pressure or running out of fuel.
Vapor recovery system.

Induction system:
Air leaks after the MAF.
Vacuum Leaks.
PCV system.
Improperly seated engine oil dipstick.

EGR system:
Leaking gasket.
Stuck EGR valve.
Leaking diaphragm or EVR.

A SHRTFT-1,2 PID value between -25% to +35% and a LONGFT-1,2 PID value between -35% to +35% is acceptable. Reading beyond these values indicate a failure.
 
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