Date Model Control unit address (e.g. 01) Diagnostic procedure
4.3.2026 Passat B8 (MQB/PQ48) 18 - Auxiliary heater Auxiliary heater: blocking - reason
4.3.2026 A3 (8V) (MQB/PQ37) 2013 -2019 18 - Auxiliary heater Basic setting of the circulation pump
4.3.2026 Octavia 3 (NE) (MQB/PQ37) 2013 - 2020 18 - Auxiliary heater Basic setting of the circulation pump
4.3.2026 Golf/Jetta 7 (MQB/PQ37) 2013 - 2020 18 - Auxiliary heater Basic setting of the circulation pump
4.3.2026 Superb 3 (NP) (MLB/PQ48) 2015 -> 18 - Auxiliary heater Basic setting of the circulation pump
4.3.2026 Kodiaq (NS) (MQB) 2017 -> 18 - Auxiliary heater Basic setting of the circulation pump
4.3.2026 Passat B8 (MQB/PQ48) 18 - Auxiliary heater Basic setting of the circulation pump
4.3.2026 A3 (8V) (MQB/PQ37) 2013 -2019 18 - Auxiliary heater Remote control learning
4.3.2026 Octavia 3 (NE) (MQB/PQ37) 2013 - 2020 18 - Auxiliary heater Remote control learning
4.3.2026 Golf/Jetta 7 (MQB/PQ37) 2013 - 2020 18 - Auxiliary heater Remote control learning
4.3.2026 Superb 3 (NP) (MLB/PQ48) 2015 -> 18 - Auxiliary heater Remote control learning
4.3.2026 Kodiaq (NS) (MQB) 2017 -> 18 - Auxiliary heater Remote control learning
4.3.2026 Passat B8 (MQB/PQ48) 18 - Auxiliary heater Remote control learning
4.3.2026 A3 (8V) (MQB/PQ37) 2013 -2019 18 - Auxiliary heater Unblocking of heater
4.3.2026 Octavia 3 (NE) (MQB/PQ37) 2013 - 2020 18 - Auxiliary heater Unblocking of heater
4.3.2026 Golf/Jetta 7 (MQB/PQ37) 2013 - 2020 18 - Auxiliary heater Unblocking of heater
4.3.2026 Superb 3 (NP) (MLB/PQ48) 2015 -> 18 - Auxiliary heater Unblocking of heater
4.3.2026 Kodiaq (NS) (MQB) 2017 -> 18 - Auxiliary heater Unblocking of heater
4.3.2026 Passat B8 (MQB/PQ48) 18 - Auxiliary heater Unblocking of heater
4.3.2026 A3 (8V) (MQB/PQ37) 2013 -2019 18 - Auxiliary heater Remote control check
 
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