Why does the OBD 2 scan show no codes?
The starter cranked the engine over, I had plenty of gas,and the battery is almost new. After getting the car towed home, I hooked up an OBD II Autoscanner. The scanner showed no codes, and said the car passed the scan test. I was expecting a sensor code, a fuel pressure code or an ignition coil code.
Why does my car scan show no codes?
The scanner showed no codes, and said the car passed the scan test. I was expecting a sensor code, a fuel pressure code or an ignition coil code. The car had done this once before – but the code reader had correctly shown a faulty crank sensor.
What should the voltage be on the OBD II scanner?
With the ignition key ON and no bus activity, BUS + should read 0V BUS should read 5V With the ignition key ON and bus activity, the voltage should vary from 0 to 5V depending on the amount of bus activity! ADDITIONAL NOTES PCM receives battery voltage (B+) through a fuse or fusible link. Check for an open circuit.
How long does it take for check engine light to come back on?
Both methods clear all the Diagnostic Trouble Codes (DTCs) from the On-Board Diangntoic computer at least temporarily. This procedure also reset the various systems in the car to Not Ready state. Depending on the problem, the check engine light could come back right away or could take up to two weeks to turn on.
The starter cranked the engine over, I had plenty of gas,and the battery is almost new. After getting the car towed home, I hooked up an OBD II Autoscanner. The scanner showed no codes, and said the car passed the scan test. I was expecting a sensor code, a fuel pressure code or an ignition coil code.
What does on board diagnostic II ( OBDII ) mean?
Vehicles equipped with On Board Diagnostic II (OBDII), which includes most 1996 or newer gasoline-powered vehicles and most 1997 or newer diesel-powered vehicles that have a gross vehicle weight rating (GVWR) less than 8,501 pounds, self-test their emission systems utilizing various monitors.
The scanner showed no codes, and said the car passed the scan test. I was expecting a sensor code, a fuel pressure code or an ignition coil code. The car had done this once before – but the code reader had correctly shown a faulty crank sensor.
When do you need to do an engine diagnostic?
Conducting an engine diagnostic when your vehicle’s self-diagnostic system apparently isn’t detecting any problems can be difficult. But you still can diagnose engine performance and driveability problems like… …if you know what are the components or systems most likely to cause these common issues.
What should I do if my OBD monitor is not ready?
Drive the vehicle at a steady 55 mph for three more minutes. During this stage of the drive cycle, it’s crucial that you keep throttle angle changes to a minimum. 4. Bring the vehicle hack to the shop, hook up the scan tool and look at the status of the readiness monitors. Repeat the drive cycle, if necessary.
When to turn OBD 2 scanner for I / m readiness?
You should then turn the OBD 2 scanner again for I/M readiness. This is important because in the event that your car goes for an inspection at the DMV or an independent station, the technician will normally test for I/M readiness using their own scan tool. You certainly won’t get a sticker if your car fails to pass the test.
How do I hook up an OBD2 scanner to my car?
The end of the cable will normally have a 16-pin plug that should give a perfect fit into the cars outlet. Turn on the ignition key or run the car, whichever is in the manual, and give time for the scanner to initialize. Some scanner models will need you to press a power button for them to begin the initialization process.
What should I do if I Can’t Read my OBD code?
If you’re scanning your car’s computer for OBD (on-board diagnostic) codes and getting nothing in return, there are some things you should check before you give up and take your car to the shop.
Why do you need an OBD2 scanner instead of a reader?
The reason why it’s important that you purchase the OBD2 scanning tool instead of a reader is because the scanner can read both codes. There are certain types of faults in vehicles that will set a P0 code and not a P1 code or vice versa.
The end of the cable will normally have a 16-pin plug that should give a perfect fit into the cars outlet. Turn on the ignition key or run the car, whichever is in the manual, and give time for the scanner to initialize. Some scanner models will need you to press a power button for them to begin the initialization process.
What happens when no codes are set for OBD2?
This means that if no codes are set (translates to no trouble found) after all the monitors have been run, then your vehicle is running clean and will pass an OBDII plug-in emissions test or a tailpipe smog check.
When did the first OBD2 code come out?
With a code reader or scanner, you can access one or more OBD2 codes that indicate the issues. OBD system started in the early 1980s with a simple function to turn on the malfunction indicator light or “idiot light” when it detects a malfunction. The codes varied by manufacturers and make, which made it difficult for mechanics to diagnose …
Where to find OBD-II check engine light trouble codes?
Choose the section of codes based on the first three characters of the code (e.g. P0171 is on the P01xx or P0100 through P0199 page): If you’re unsure where to find code information, we highly recommend you just use the search feature instead to get help!
Where are OBD2 codes stored in a car?
Diagnostic trouble codes (or fault codes) are obd2 codes that are stored by the on-board computer diagnostic system. These are stored in response to a problem found in the car by the system. These OBD2 codes are stored when a sensor in the car reports a reading that is outside the normal/accepted range (Eg: fuel mixturetoo rich).
How to find an OBD code for a car?
Trouble code scanner showed me three codes: ECM-P200A84 Inta… Car idling too fast at times and not at others… It’s Audi A4 1.8 2012 model.this car start then shutdown immediately. Stabilisation Control (ESC) Fault! See owner’s manual. i try to use OBD2 scan tool so there is the code found. ( P0642 )s… Check engine light came on.
You should then turn the OBD 2 scanner again for I/M readiness. This is important because in the event that your car goes for an inspection at the DMV or an independent station, the technician will normally test for I/M readiness using their own scan tool. You certainly won’t get a sticker if your car fails to pass the test.
Why is my OBD2 not connecting to YouTube?
These issues include an incompatible obd2 scan tool, bad fuses, damage in the circuit board, ECU, and failed computer. OBD-II…. Non connecting data Port Issue. *FIXED* This might help you! – YouTube OBD-II…. Non connecting data Port Issue. *FIXED* This might help you! If playback doesn’t begin shortly, try restarting your device.