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A/C cooling is weak and gradually loses performance

Q: How to fix A/C cooling is weak and gradually loses performance in Honda Pilot?

Conducting a workshop 'felt pad test' (removing the felt pad from the compressor and assessing on paper whether it saturates the paper with oil within 10 seconds). The repair involves surgically replacing the shaft seal on the vehicle using a dedicated '6CVC Seal Replacement Kit' (includes seal, C-ring, O-ring and felt washer). If the shaft is scratched or the repair fails again, the entire compressor is replaced. Honda has extended the warranty on this part to 10 years with no mileage limit.

in Honda Pilot (2016-2022)

Symptoms

Slow loss of refrigerant

DTC error codes

Low pressure fault

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Technical diagnosis (Premium)

Recognized technical fault:

Auxiliary controller voltage instability detected

Technical analysis

Detailed analysis of HVAC controller operation parameters, CAN bus data readings, and diagnostic signal waveforms. Purchase PRO access or log in to read the full fault analysis.

Confirmed solution

Complete step-by-step repair procedure including module non-volatile memory reset, sensor calibration, and correct wiring routing. Unlock the full report to see the instruction.

Parts needed

Filters ferrite anti-interference / noise suppressor
Auxiliary starting battery (depending on cell status)

Workshop hacks

Important workshop tips for mechanics regarding bypasses without expensive control module replacement and manufacturer software service bulletins.

TSB / TPI service bulletins

TSB-24-HVAC-01TPI-2068943/2

A/C Technical Specifications

~ (Starsza generacja)

Refrigerant: R134a Amount (g): 650g Oil: - Oil (ml): - ml

See full specification

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A/C cooling is weak and gradually loses performance

Symptoms

DTC error codes

A/C Technical Specifications

Other problems in Pilot

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