OBD/I Code 139 For Azlk Moskvitch

The following is some common obd code description for easy troubleshooting, there are others also you can check.
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Other Symptoms Of OBD Code 139 For Azlk Moskvitch

Before troubleshooting the code-139, please view other descriptions of it.

(M) Oxygen sensor not switching Left or Front HO2S - Fuel control


Error Code :139 Loss of comm usually means a connector is to blame, first step would be to pull and inspect the connectors (in this case, the headlight switch and the cluster module) for damage, or a pin that has been shoved back, then reseat them. If that doesnt fix it, then the PITA job of looking over the whole harness for pinch points.

Track the voltage curve of accelerator pedal position sensor 1 and 2 in the engine data stream by GDS2 diagnostic tool.(show in below pic).According to the voltage curve,we found voltage signal of APP1 and APP2 difference value are not expressed in multiple relation

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