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Ultimate Guide to Troubleshooting and Fixing the P0128 Code

how to fix code p0128

Code P0128 is a diagnostic trouble code (DTC) that indicates a problem with the engine coolant temperature (ECT) sensor circuit. The ECT sensor is responsible for sending temperature data to the engine control module (ECM), which uses this information to adjust the air-fuel mixture and ignition timing. A faulty ECT …