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#1 (permalink) Old 09-01-2012, 06:20 PM
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can any one her help me with my car problem im getting a 1890 and1891 code my symptoms are ill drive it a few miles and the dynamic drive inactivated message will come on then the tranmission safe mode comes on than a couple of miles the road my whole dash will blink on and off is there any fix soultion to this nightmare
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#2 (permalink) Old 09-02-2012, 01:22 PM
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What year is your car? and model?

Their are numerous people who have reported this problem. However, some solutions vary. Numerous people have stated that the problem was caused by their alternator.

P1890 Throttle Position Signal Input
P1891 Throttle Position Sensor PWM Signal Low

These codes could be a result of a bad TPS, or bad electrical signal from the alternator.

Other people have reported that is is the wheel speed sensors that have failed, or become too dirty. See below. Part # 22 is the wheel speed sensor but it is called "pulse generator".

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