Check Engine Light Illuminates
This won't be caused by the upgrade but is a handy check if you have a sensor failure. Follow the procedure detailed below:
Turn ignition OFF.
Connect black connectors under steering column.
Turn ignition ON (Engine OFF).
Engine Check lamp turns on.
Any codes are indicated by a flashing lamp.
If Code is OK then Turn ignition OFF & Disconnect Connectors.
Turn ignition OFF & Disconnect Connectors.
If there is a fault code check in the table below to see which sensor the code pertains to:
Reading the code: The long pulses (1.3 Seconds) indicate Tens and the short pulses (0.2 Seconds) indicate ones. Pulses are separated by Short Pauses (0.2 Seconds), multiple codes are separated by a Long Pause (1.8 Seconds). The codes are cycled.
11 Crankshaft position sensor
12 Starter switch
13 Camshaft position sensor
21 Engine coolant temperature sensor
22 Knock sensor
23 Mass air flow sensor
24 Idle air control solenoid
31 Throttle position sensor
32 Oxygen sensor
33 Vehicle speed sensor
35 Purge control solenoid valve
42 Idle switch
44 Wastegate control solenoid valve
45 Pressure sensor
51 Neutral position switch
Found this here. Frequently Asked Questions
Hope it helps you out.