Use the live data function on your scanner to monitor oxygen sensor data.You’ll want to refer back to this as you continue to troubleshoot the problem. Hook up your OBD-II scanner, here's a great one we use daily and record both trouble codes and freeze-frame data.
Ecm sensor code#
Take your time with this step because it’s easy to miss fraying/cracked insulation that may be the culprit causing code P0135. Begin by visually checking all electrical connections and all components of the wire harness to the bank 1 sensor 1 oxygen sensor.Here’s how we recommend you check it out for yourself:
Ecm sensor how to#
Diagnosisįiguring out how to fix code P0135 (heater circuit malfunction) isn’t an excessively complicated process, but you need to take things one step at a time. It’s also a good bet that if the rough idle or check engine light goes away as your vehicle warms up and idles for a while that there's an O2 sensor heater circuit malfunction. If your check engine light comes on and you notice a rough idle at startup, you probably have a code P0135 or similar oxygen sensor code. Since your ECM controls the fuel/air mixture using data from the O2 Heater Circuit Sensor, your vehicle is going to be idling rough until the sensor heater circuit heats up enough to start sending output voltage to the ECM. Given that these problems all indicate some type of wiring problem, more than likely you’re going to need to check the wiring on and around the O2 sensor heater circuit for wear or damage. You may also see this code pop up if the ECM detects those three problems during normal vehicle operation. In the normal condition, the throttle valve stop screw pushes throttle valves slightly, and the middle line will be indicated.Most of the time, a P0135 code (Bank 1 Sensor 1) indicates the ECM found one of three problems on startup: an excessive current draw, an open circuit or short circuit. If the indication is upper or lower line when engine rpm is 1 300 r/min, slightly turn the throttle position sensor and bring the line to the middle. In front of the three digits, a line appears in any of the three positions, upper, middle or lower line. The malfunction code is indicated in three digits. To get the proper signal from the throttle position sensor, the sensor basic position is indicated in the LCD (DISPLAY) panel. In the LCD (DISPLAY) panel, the malfunction code is indicated from small code to large code. Ignition switch signal (IG switch signal/immobi. Secondary throttle position sensor (STPS)įuel pump control system (FP control system) Side-stand/ignition inter-lock system is not working. The possible cause of this indication is as follows Įngine stop switch is in OFF position. It is necessary to check the wiring harness between ECM and speedometer couplers. If CHEC is indicated, the LCD does not indicate the trouble code. In this case, the speedometer does not receive any signal from ECM, and the panel indicates “CHEC”. The ignition switch is turned ON, and the engine stop switch is turned OFF. “CHEC”: The LCD panel indicates “CHEC” when no communication signal from the ECM is received for 5 seconds. In this case, “FI” is indicated in the LCD panel. Signal or ignition switch signal is not sent to Tip-over sensor signal, #1, #2, #3 and #4 ignition signals, P#1, #2, #3 and #4 injector signals, fuel pump relay The injection signal is stopped, when the camshaft position sensor signal, crankshaft position sensor signal, When one of the signals is not received by ECM, the fail-safe circuit works and injection is not stopped. This case, “FI” and coolant temperature are indicated in the CD panel Eand motorcycle can run. In this check, the special tool is necessary to read the code of the malfunction items. To check the function of the individual FI system devices, the dealer mode is provided. The user can only be notified by the LCD (DISPLAY) panel and LED (FI light). The function has two modes, “User mode” and “Dealer mode”. The self-diagnosis function is incorporated in the ECM.