Can anyone point me to a listing of the check engine codes and their descriptions for a 91 Thanks for the help. If they dont then it was a faulty clock-spring all along. When you have the codes post them here. This sensor controls engine operation such as fuel cut. Maybe this should be a sticky.
Marcus greg This up your alley. Look up the other , please use the search box. Any help will be appreciated. Typically, the sensor should read around 4. It means either a it is not grounded or that a wire has broken or something has come unplugged. The code indicates the throttle position sensor circuit high voltage. I did the key trick and it displayed P0457 and then switched to 0456 after about a second.
G Generator Lamp Illuminated within 5 seconds. I checked fuel pressure and its 49psi but that doesnt mean i have enough flow. It could also be that the connector is deformed from heat and you may need to replace it with one from the junkyard. I think there is a second fault affecting the car and not just the throttle pedal. Idle position of the throttle valve is determined by the receiving the signal from the throttle position sensor.
If not, you have a problem with the sensor power supply. Possible Solutions If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back. I have gone through the engine bay and tightened all the ground wires I could find. I have a faulty clock spring but its been bad for two years so im not contributing it to this problem. On the other hand, the Wide open and closed throttle position switch, which is built into the throttle position sensor unit, is not used for engine control. How do you troubleshoot code P0123? On ScannerDanner Premium I will bring you right into my classroom at Rosedale Technical College. The computer notices the canister is empty when it detects a leaner condition all the vapors are used up and it resumes normal fuel delivery.
In addition, the sensor detects the opening and closing speed of the throttle valve and feeds the voltage signal to the. Do you know several reasons why the light will turn on Thanks Vivica B Malfunction CamRotorInjector P0257 Injection Pump Fuel Metering Control B RangePerformance Injector P0258 Injection Pump Fuel Metering Control B Low CamR P0259 Injection Pump Fuel Metering Control B High CamR P0260 Injection Pump Fuel Metering Control B Intermittent Injector P0261 Cylinder I Injector Circuit Low P0262 Cylinder I Injector Circuit High P0263 Cylinder I ContributionBalance fault B Malfunction CamRotorInjector P0257 Injection Pump Fuel Metering Control B RangePerformance Injector P0258 Injection Pump Fuel Metering Control B Low CamR P0259 Injection Pump Fuel Metering Control B High CamR P0260 Injection Pump Fuel Metering Control B Intermittent Injector P0261 Cylinder I Injector Circuit Low P0262 Cylinder I Injector Circuit High P0263 Cylinder I ContributionBalance fault. P0123 Code Description: The catalytic converter has an oxygen sensor in front and behind it. If the voltage spikes or is too high over 4. Or you may have lost the 5Volt reference voltage. You might have to clear the code with a scanner.
If your vehicle is an older model with a non-electronic Fuel And Air Metering, you can check the distributor cap to see whether the spark is getting from there to the coil and on to the spark plugs. I did the wiggle test at the pcm and it stumbles so I think I may be on Quote Originally Posted by ta3834bbl Its still there but the dying is getting worse and 2 times now it was really hard to start. Symptoms consistent with a faulty throttle position sensor include: hesitation or stumbling upon acceleration, unstable idle, and an illuminated check engine light. Most throttle position sensors are simple and easy to troubleshoot. I hope Im in the right forum.
If there it and i still have my original codes but now a coolant temp sensor popped up so i changed that too. This could be used by lots of other forums as well. These sensors provide the much needed input from the foot of the driver in terms of how much power the engine needs, and how soon it is needed. Thanks Funny thing is I had read a post in this forum just prior to all this that mentioned the clock spring and I blew it off regret that now I figured how would a clock spring make the engine stumble on itself. I guess sometimes you cant fight cityhall aka. I had this problem and I changed the sensor and it stayed then cleaned every thing up and havent had a problem ever since also throw in a seafoam bottle clean our engine. Typically, the signal value at idle will be about.
How serious is the P0123 code? I just unhooked the battery. These are the codes that are required for basic emissions fault diagnosis. I checked my work and discovered that the air filter container lid wasnt properly Funny thing is that after I checked the voltage on the sensor the car started running really bad and stalling and over revving and doing all sorts of crazy stuff. Its still there but the dying is getting worse and 2 times now it was really hard to start. The P 1299 is a manifold pressure error. The on-board diagnostics system and engine control unit are in charge of monitoring a bunch of different, and if they get a reading that's a little out of whack, up pops the check engine light.
The return voltage depends on throttle positon. When the vehicle is warm and running in closed loop mode, the upstream oxygen sensor waveform reading should fluctuate. Ok from what you are saying. Idle position of the throttle valve is determined by the receiving the signal from the throttle position sensor. While switching it out I had the negative side of the battery disconnected.
If either sensor isn't working correctly, the car will run rough and the engine will be less efficient. When the gas pedal is depressed, the control module commands the throttle to open. This enables you to spot any fleeting problems. Engine Code Search Search engine trouble codes. I have tried to check this as well as I can against several sources and I believe it is correct. P1492 M -- AmbientBatt Temp Sensor Volts Too High -- Battery temperature sensor input voltage above an acceptable range.