Pull the codes from the computer, match the code to the troubleshooting procedure, follow the procedure to find the source. Repair the source, light will go out if that was the only problem. There are "monitors" or self test the computer runs the car through, if a problem occurs, it may not run all of the self tests until that problem is taken care. Therefore, another problem may exist. It is emission related.
you replaced speedo, so try replacing speed sensor
Have the code read. Autozone will do this for free. Even though the light is not on now. It will be stored as a recent code. It has to cleared to be erased completely. Good luck. i had the same problem with mine it turned out to be the knock sensor i replaced it and the problem went away give that a try
When this happened to me on my seven year old 2.2 DCi laguna I had to hae taken in to the Renault dealers. It turned out to be the a problem with both the cam sensor and the fuel injection sensor. Both had to be replaced at a cost 0f £300 in all. It did cure it though! May also be TDC / crank sensor. Worth removing it and giving it a clean.
Depending on the year it could be in the distributor or by the crank's pulley. On 93-98 Honda passports with the 3.2l engine the crankshaft position sensor in located on the passenger side of the engine near the engine mount. 93-95s did not have the camshaft sensor though. that was added in 96 and is located on the d/s valve cover in the outside upper corner
You need to reset the light by using diagnostic equipment even though the part was replaced the fault code will still be stored in the ECU memory.
On our '92 the light comes on when the water level in the resovor is low. If you have the correct level of coolent possibly your sensor could be bad. Try filling the plastic resevior if it is low. There is a sensor on top of it that makes the light come on even though the temp is not hi.
The O2 sensor is located on the rear exhaust- driver's side. Easiest to get to if you rotate the engine forward and away from the firewall. I have used regular wrenches even though they sell O2 sensor wrenches.
Unscrew the bolt through the centre of the sensor & unplug the wiring connector. Re-fitting is the reverse of removal. More often than not the knock sensor is not faulty though, the engine is knocking due to low oil level.
Sounds like head gasket is leaking allowing coolant into combustion chamber
I dont know what codes you were getting. double check the connections. And get the code cleared. retry it. If it still comes on reread the code to see what it says. You didnt get anything on tips of the o2 sensor did you? Another thing the rear one refers to the one after the Cat converter. Is that the one that was replaced? People sometimes forget this. If there is still a probplem the circuit has a prblem. The code would be saying this though. Hope this helps.
It wouldn't make much of a vacuum leak to cause the engine to idle at high RPM. First check for vacuum leaks even though you may still have good manifold vacuum.
Which sensors have you replaced, these cars have 2 of them. One located on the thermostat housing, and one located on the rear of the block under the exhaust manifold.