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DTC codes / Volkswagen codes / P1134
P1134 on Volkswagen vehicles indicates that the engine control module has detected a short to battery positive voltage in the oxygen sensor heating circuit for bank 1 and bank 2 sensor 2. This means the heater element inside the post-catalytic converter oxygen sensors is receiving constant power, which can prevent the sensor from reaching operating temperature and disrupt fuel trim calculations.
Guidance is general and written for Volkswagen vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.
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