CTA4AVANT

01 - Engine:

#17537 - Fuel Trim Bank 2 (mult.) - System Too Rich - P1129-35-10 - Intermittent

#17535 - Fuel Trim Bank 1 (mult.) - System Too Rich - P1127-35-10 - Intermittent

#17549 - Load Calculation Cross Check - Implausible Value - P1141-55-10 - Intermittent


08 - Auto HVAC:

#00787 - Temperature Sensor in Fresh Air Intake Duct (G89) 30-00 - Open or Short to Plus

#01274 - - Air Flow Flap Position Sensor (V71) 41-10 - Blocked or No Voltage - Intermittent

#01206 - Signal for Duration of Ignition Off Time - 27-10 - Implausible Signal - Intermittent


Any insight on what's going on and if anything needs repair/replacing?

TIA

diagnosticator1

All of the DTCs indicate that the effected components or systems require repair. The fuel mixture "too rich" means that there is excess fuel for the amount of air flowing into the engine, and that the engine load measurement values derived from two separate means, is inconsistent with the other, and may be directly related to the fuel mixture error, depending on the specific faults causing the DTCs. For example, the MAF measurement value is one of at least two measurements used to evaluate engine load, and is also key for determining how much fuel is needed at any instant.

The DTCs in the A/C controller, are common and are often caused by glitches in the servo motor/air flap position feedback potentiometers, sending incorrect or missing position feedback information to the A/C controller. Updated servo motors have been introduced to remedy this cause. If the flaps can be heard squeaking and groaning as they move, then determine and correct the reason the flaps are sticking and not moving smoothly.