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[Arfat Anis]

My CHECK ENGINE light is ON and I am getting the following error codes on my Ford Explorer 2013 please suggest how to fix them:

Powertrain Control Module:
(1) P0420:00-68 Catalyst System Efficiency Less Than Threshold – Bank #1
(2) P0430:00-EC Catalyst System Efficiency Less Than Threshold – Bank #2
(3) P2196:0028 O2 Sensor Signal Biased/Stuck Rich – Bank 1, Sensor 1
(4) P2198:0028 O2 Sensor Signal Biased/Stuck Rich – Bank 2, Sensor 1

HVAC:
(1) U0140:00-08 Missing Communication with BCM

RCM:
(1) U0557:82-08 Invalid Data Recieved From Front Control Interface Module A

I will be very thankful to you for your kind help and reply.

[Arfat Anis]

The engine is 2.5S and the head is aluminium according to the feeler in the image it looks like it is 0.15 mm but the technician tpld 1.5 mm. I want to cross check because i feel they are trying to cheat me.

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