The test engine burnished on a One thousand nine hundred ninety four Ford Explorer is an comment that a doable puzzle exists within the engine government personal computer. The research engine glowing refers to all purely electrical or electro-mechanical systems. It does not give forth any purely mechanical problems. When the engine state machine senses an abnormal, out-of-range word from a sensor, or abnormality in the assistance of a electro-mechanical Slogan such as a fuel injector, it Testament allot a rule in its mind. It Testament be a sequence of five digits (a dispatch followed by four numbers.) A code scanner is binding to extract the codes. A code phase comes with the scanner so you can decipher the decree(s). The onliest pathway to light a test engine luminous is to prerrogative the enigma aboriginal.
Instructions
1. Allot the OBD (on board diagnostics) Harbour below the sprint to the left of the steering line.4. Once you have completed the necessary repairs, turn the ignition key to the "On" position without starting the engine. Press the key marked "Erase" to erase the codes in the computer and extinguish the light until a future problem presents its ugly head.
2. Press the explanation blatant "Read" on the scanner. Record the code or codes displayed. Turn the key off. Cross-reference the code with the code sheet that accompanies the scanner.
3. Repair the associated problem. Of all the codes, the O2 (oxygen sensor) is the most difficult to diagnose. The Ford Explorer has two sensors - one in the exhaust system in front of the converter identified as S1 (sensor-1) and one behind the converter identified as S2 (sensor-2). If either sensor displays a code stating "heater inoperative" it is most likely the sensor or a wire connector to it. If sensor-1 states that the stoic fuel ratio of 14.1 has been exceeded, it is an ambiguous code more commonly referred to as a soft code. It is possible that the sensor has failed; however, in all probability, the mixture is indeed out of parameters. This can be caused by any of the engine electrical components or the engine itself. These possibilities must be explored first. The sensor behind the converter checks the operation of the converter. The signal should be higher than the one in front of the converter indicating that there is less free oxygen coming out than going in. If the signal is the same as the number-1 sensor, the converter has failed.
Plug the decree scanner into the OBD Harbour. Turn the ignition vital to the "On" position without starting the engine. The warning lights on the sprint Testament decorate.
