Hyundai Repair Questions? Ask a Mechanic for Answers ASAP
Hi Im David. thanks for visiting thee site. please allow m a few minutes to look up some information for you....thanks
well first off you can change the tps a thousand times and its not going to fix the issue. neither is the maf.
please allow me a few minutes so i can tell you what to do next. thank you.
P0121 Hyundai Description The throttle position sensor (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 (ECM). In addition, the sensor detects the opening and closing speed of the throttle valve and feeds the voltage signal to the ECM. Idle position of the throttle valve is determined by the ECM receiving the signal from the throttle position sensor. This sensor controls engine operation such as fuel cut. 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.
you will need to do a continuity check of the wiring between the tps and the acceleration sensor and then between each of those sensors and the ECM. not only check for continuity, but for high resistance shorts to ground and shorts to each other.
as long as the crimps were done correctly, it wouldnt have mattered. you really should have used a new oem sensor, but that just my opinion. you never know what you''re getting from a pic n pull when it comes to electronics. anyway. the above continuity procedure must be done to insure the integrity of the wiring unless you can physically find a damaged or pinched harness or wire.
I will be on throughout the day, but will be leaving for an appointment shortly.
reverse has a higher pressure than all the other forward gears
take your meter, select ohms. put one lead in the connector to the sensor you are checking(sensor disconnected) on the wire you are checking. put the other lead in the position of the ecm connector (disconnect connector)that correlates to the sensor wire you are checking. if the wire is good, the meter should read between 0.00-0.3
does the tach move when trying to start? if not then the crank sensor is bad.
ill be gone fro about an hour. but will look for your answer
yes it can be, but to be sure you need to have a scan tool put on it and see if the computer is seeing rpms
if the computer isnt seeing rpms, then the cranks sensor will be the culprit. i dont want to tell you that just because the tach isnt working at all.
do you still need assistance?