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You are still getting high or low voltage at tps? What is the voltage and do you have a unstable idle? Put you + lead on terminal 3 and - lead on terminal 1 turn ignition on and check voltage to be at approximately 5 volts. You can also back probe with it connected at center wire and ground probe to a good ground at engine. Turn ignition on it should read between 0.20 - 0.90 slowly manually open throttle it should rise all the way to 4.5 voltd at full open. If its bad change tps if no 5.0 volts from pcm on first test check connections at pcm. The center tps connector supply wire comes from pin 22 and connection 3 ( which is 5 volt supply ) comes from pin 6. You should be able to back probe pin 6 turn ignition on and have 5 volts. If not 5 v brain has problem.
DTC21: SAFING SENSOR NOT MOUNTED TO VEHICLE PROPERLY
It's the airbag diagnostic monitor. May just be a grounding issue with the sensor - came loose or has some dirt in it. Check the kick panel underneath the driver's side and see if anything came loose (might have inadvertently kicked something),
I read on another site that if the indicator on the dash is malfunctioning and there's a fault code in the system, the beeping is a secondary indication that there's a need for service. I've had my air bag light blinking for some time now. Yesterday my gauges went out, Oil Pressure, Gas Level, Temp Level, and the Battery Charging Meter, all went dead. After starting the vehicle, it beeps 5 sets of 5 beeps. Since the dash obviously has problems, (Including the Air Bag blinking thing not working), the beeps I now hear are what you are experiencing. However, if you still see the air bag light blinking, maybe your situation is a bit different than mine.
Answer: The engine noise, it is impossible for us to help you here without listening to the engine ourselves. As for your idling problem, check all the vacuum hoses and intake manifold gaskets as you might have a slight vacuum leak somewhere. In addition, check the idle speed control motor to make sure it is operating properly. If all checks out okay, scan the computer for fault codes. Scan the computer for fault codes. Also, check the oxygen sensor and coolant sensors and also Check your EGR (exhaust gas recirculation) valve it sounds like it is stuck open and needs replacing