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Re: how to determine obd codes without a scanner?
There are some checks you can do on the sensors, but that won't tell you where to begin. You really should have your codes read so that you know what your car is telling you is wrong. This is one of the best diagnosing tools you have, and it's right there on your car. What kind of problems are you having? There is no way to erase the codes without the scanner though.
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Jumper pin 3 and 4. Take a paper clip and insert to bridge pin 3 and 4. And count flashes then cross reference flashes with google. Well thats how obd 1 and 2 works to pull do codes wthout scanner. Youl need key turned to acc. Not started mind u.
My source says code 2196 means the signal coming from the O2 sensor is stuck on rich.
The sensor is supposed to switch back and forth from lean to rich to lean as the computer controls injector "on" time. If the sensor signal stays rich, in most cases there is a leaking injector, or the sensor is faulty. I doubt a short to anything would be involved.
The sensor generates a small ac voltage between zero and one volt. Less than 1/2 volt is lean and more than 1/2 volt is rich. There is a heater in the sensor that could short to the signal wire, but then you should have a code for the heater circuit too.
You can remove the sensor and check for excessive carbon buildup from a rich fuel mixture, or go ahead and replace it and see what happens. A repair shop would be able to check exhaust gas output to find out if its the sensor or a leaking injector.
A scan tool allows for the OBD II (On Board Diagnostics) codes to be read from the engine computer in a car. These are common electronic diagnostics tools used by automotive technicians. They are usually used when a check engine light comes on to determine the error codes associated with the check engine light.
They almost always connect via a standard plug on the divers side under the dash.
Most automotive parts supplier will check a car with complementary service to determine the codes stored in a customers automobile.
a bit more info would be nice.. like what you are trying to diagnose .. take it to one of the aftermarket auto stores and have them put a tester on the info port-if it runs. that will offer you info in error code format and point to the problem area. if it is simply a wire lose or grounding or broken, in todays electronically dominated world..... Lucy we got a problem... get a multimeter and a case of miller light.
What I would do: get a fault code reader on you truck. Autozone will put one on it for Free. Record the codes and use a Haynes manual and on-line research to assist in diagnosis. You probably have several simultaneous issues that are affecting one another. Usually an ABS warning light comes on, when the vehicle isn't moving, when a wheel sensor or sensors is bad and/or the ABS computer module is bad. Rebuilt modules can be had for $100 or so. Sensors are easy to replace once you determine either with a specific fault code or with a multimeter which ones are faulty. If the vehicle is moving and the ABS light comes on when you are pressing the brake... this is normal when the ABS is activated and the vibration is felt through the brake pedal.
Without the year, make, model of the vehicle in question it makes it hard to determine what might be the issue. Assuming your car has an error code of E7 it has a computer and you have pulled the code. Try a google search and match to the vehicle as many car companies could use the same code number but for different faults. Many of these aren't cut and dry with one failing component causing the issue or tripping the code. It is a process of elimination at that point. Some of these can be tested simply using a multimeter. If you suspect one device, google how to test it to determine if it is indeed good or bad. Go down the line from there. Good luck
If the tailpipe is sooty this is a tell tale sign of running too rich. (Not enough oxygen for the fuel). This could be due to a clogged vaccum line along with a failing throttle position sensor. These can be removed from vehicle and checked with a multimeter to determine if the unit is failing/failed. A diagnostics scanner may shed some light on this if a sensor has failed as it may have a code tripped in the ECU