Powertrain
generic / SAE
P2523
A/C Request B Circuit Low
The A/C request input B reads stuck low — short to ground or permanently asserted request. Same effect as input A stuck low, applied to the second HVAC channel.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number5 / 23
Possible causes
- Request wire shorted to ground high
- Connector pins corroded - high contact resistance low
- Harness chafing through insulation low
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 80–500 €
- Estimated time: 0.4–2 h
- Component: ac request input b
- MIL / check engine light
Sources
References
sae:J2012