Hey guys---I have a 98 I30 that has been trouble free for years and has just started to act up. I got a maf cel last week and got a used one from the yard and put it in and reset the code. Everything was fine for a week until it the light came on. This time it is for the TPS. I checked the sensor and the plug is secure---is there a way to check this with a DVM to see if it is really bad or not? If not, does anyone know the procedure to install a new one/used one---do they need to be set or taught closed and open position?

Thanks guys!

Mark

 

0403
Diagnostic Trouble Code 0403 points to a problem with the Throttle Position Sensor. The TPS responds to the accelerator pedal movement. This sensor is a kind of potentiometer which transforms the throttle position into output voltage, and emits the voltage signal to the Engine Control Module. In addition, the sensor detects the opening and closing speed of the throttle valve and feeds the voltage signal to the ECM.
This malfunction may be detected in three different circumstances.
A) An excessively low or high voltage from the sensor is sent to the ECM. In this situation the ECM enters fail-safe mode (acceleration will be poor) and turns on the Malfunction Indicator Lamp.
Possible causes include ...
- Harness or connectors (the throttle position sensor is open or shorted.)
- faulty Throttle Position Sensor
B) A high voltage from the sensor is sent to the ECM under light load driving conditions.
Possible causes include ...
- Harness or connectors (the throttle position sensor is open or shorted.)
- faulty Throttle Position Sensor
- fuel injector(s)
- Camshaft Position Sensor
- Mass Air Flow Sensor
C) A low voltage from the sensor is sent to the ECM under heavy load driving conditions.
Possible causes include ...
- Harness or connectors (the throttle position sensor is open or shorted.)
- intake air leaks
- faulty Throttle Position Sensor




More information in the 4th gen howtos

 

sorry about that kevlo---I forgot all about the howtos! Usually I am much better about reading first. Thanks for the info and not getting ****y like most do.

Mark