![]() Technicians will also need an advanced scan tool that allows live data to be read and graphed will be required as well. A noid light set is used to monitor the pulse width and duration of the fuel injectors a factor that is important in fuel delivery. These are used to ensure accurate diagnosis and to avoid guesswork. Repair or replacement of a faulty wiring harnessĪdditional comments for consideration regarding the P0202 codeĪ professional will use specialty tools in the diagnostic process of P0202.Fuel injector replacement for cylinder 2.In either circumstance, it is advised to have professional help as soon as possible to get the vehicle back to its normal operation. This can be a result of the ECM enabling failsafe mode to protect the vehicle or a failed component, such as a fuel injector. P0202 can present serious issues if left unresolved, such as the vehicle dying and not being able to restart. The injector circuit must be fully tested before the fuel injector is replaced to make sure there are no other faults. Care should be taken when performing diagnosis to follow all steps in their entirety and in the correct order. Mistakes when repairing and diagnosing the vehicle can be costly and can waste valuable time and money. Common mistakes when diagnosing the P0202 code Lastly, the ECM will be tested if the vehicle passes all other checks. The technician will then use a noid light installed between the injector and the wiring to test the pulse of the fuel injector. After the visual inspection, the scan tool will be used to check for injector operation and voltage and resistance.Ī digital multimeter will then be used to check for voltage present at the cylinder 2 fuel injector. Next, a visual inspection will be performed for the injector circuit looking for any damaged wiring, loose or broken connectors, or components with damage. All codes will then be cleared and a road test of the vehicle will be done, preferably under conditions similar to when the fault was first detected. These codes will have freeze frame data associated with each code which tells the technician what the vehicle conditions were when the malfunction was detected. How does a mechanic diagnose the P0202 code?įirst, a technician will use a scanner to find out what codes are stored in the ECM. Vehicle may stutter or die while running and not restart.Rich or lean engine conditions causing poor gas mileage.Open or short in the wiring harness for the cylinder 2 injector circuit.Failing or failed cylinder 2 fuel injector.Failsafe is enabled until normal injector operation is found or the fault is repaired. This failsafe mode is to protect the vehicle from further damage. The malfunction causes the ECM to set a Check Engine Light and a failsafe mode. The code is set once the ECM detects out-of-range voltage or resistance. P0202 indicates that the ECM has detected a malfunction for the cylinder 2 injector circuit. P0202 may also be seen with misfire codes and lean or rich condition codes. The P0202 code is a general OBD-II diagnostic trouble code (DTC) associated with the injector circuit.
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