What you are looking for is what cylinder is what number. The firing order of the engine. I'd have to look it up to tell you, but #1 cylinder is in the front of the cylinder head, the head being the farthest head forward. Here is some information on your codes........P0201 DODGE - Fuel Injector 1 Circuit Open... Possible causes; Faulty fuel injector 1, Fuel Injector 1 harness is open or shorted, Fuel injector 1 circuit poor electrical connection....... P0141 DODGE - O2 Sensor 1/2 Heater Performance.... Possible causes, Faulty Heated Oxygen Sensor (H2OS) Bank 1, Sensor 2 Heated Oxygen Sensor (H2OS), Bank 1 Sensor 2 circuit fuse Heated Oxygen Sensor (H2OS), Bank 1 Sensor 2 circuit open shorted to ground, Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 circuit poor electrical connection, Faulty Engine Control Module (ECM).... The code means that there is a problem with the heater element circuit of the heated oxygen sensor. The control module monitors how long it take the sensor to warm up and start sending an adequate signal. The code is triggered when the sensor is taking too long to warm up. Water getting inside the heated oxygen sensor connector can caused the heated oxygen sensor fuse to blow. Before replacing the sensor, check for the condition of the heated oxygen sensor fuse and connectors. If the sensor and connector are OK, replacing the O2 Sensor 1 usually takes care of the problem....But I think you may have this info.... Bank 1 is the Bank on the drivers side. I would replace the fuel injector on #1, check the wiring for broke wires, check continuity to be sure, the problem usually is at the plugin at the injector. This could cause the po141 code, so after replacing the injector, clear the codes and drive it for awhile. Check engine light comes back on, po141 code, check out the O2 sensors as described.
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