Your question: "Look at the sequence -31, -28, -25, -22 .....................92 a) determine the n th term Tn b) Determine the position of the final term in the number pattern"

A P0122 code means that the the vehicle's computer has detected that the TPS (throttle position sensor) "A" is reporting too low a voltage. On some vehicles that lower limit is 0.17 - 0.20 volts (V). In simple terms, the throttle position sensor is used to determine what position the throttle is at.

Read more at: https://www.obd-codes.com/p0122
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Visit the site posted for more information on possible fixes for your TPS sensor.

The role of the crankshaft position sensor is to determine the position of the crankshaft, the crankshaft angle. It is usually with a camshaft position sensor work together - to determine the basic ignition timing. Car Diagnostic Tool

This maps the position of the cranskshaft to enable th ECU to determine the correct ignition and fuel corrolation.

Hi there:

The camshaft position sensor is an integral part of the distributor and not serviceable.


The crankshaft position sensor reads the rotation of the crankshaft which the computer translates to determine engine timing sequences. The computer uses this reading, in conjunction with the camshaft position sensor, to determine proper fuel injection and ignition timing.



Fig. 3: Exploded view of the crankshaft position sensor mounting


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Hi Patrick:
The Crankshaft Position Sensor (CKP) is mounted into the engine block above the starter motor. Engine speed and crankshaft position are provided through the crankshaft position sensor. The sensor generates pulses that are the input sent to the powertrain control module (PCM). The PCM interprets the sensor input to determine the crankshaft position. The PCM then uses this position, along with other inputs, to determine injector sequence and ignition timing. The sensor is a Hall effect device combined with an internal magnet. It is also sensitive to steel within a certain distance from it.

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Locate can be found in numerous places .
My personal favorite is the dictionary.


lo·cate verb lo·cat·edlo·cat·ing Definition of LOCATE intransitive verb : to establish oneself or one's business : settle transitive verb 1 : to determine or indicate the place, site, or limits of 2 : to set or establish in a particular spot : station 3 : to seek out and determine the location of 4 : to find or fix the place of especially in a sequence :

4.0L
The Crankshaft Position Sensor (CKP) is mounted to the transmission bellhousing at the left/rear side of the engine block. Engine speed and crankshaft position are provided through the crankshaft position sensor. The sensor generates pulses that are the input sent to the powertrain control module (PCM). The PCM interprets the sensor input to determine the crankshaft position. The PCM then uses this position, along with other inputs, to determine injector sequence and ignition timing. The sensor is a Hall effect device combined with an internal magnet. It is also sensitive to steel within a certain distance from it.
On 4.0L 6-cylinder engines, the flywheel/drive plate has 3 sets of four notches at its outer edge. The notches cause a pulse to be generated when they pass under the sensor. The pulses are the input to the PCM. For each engine revolution there are 3 sets of four pulses generated.
The trailing edge of the fourth notch, which causes the pulse, is four degrees before top dead center (TDC) of the corresponding piston. The engine will not operate if the PCM does not receive a crankshaft position sensor input.

This is a photo of the bell housing on the transmission:

Its not unusual for the crankshaft sensor to intermittanly fail. The crank sensors are not real expensive and are not extremely hard to change.
The Crankshaft Position Sensor (CKP) is mounted into the engine block above the starter motor. Engine speed and crankshaft position are provided through the crankshaft position sensor. The sensor generates pulses that are the input sent to the powertrain control module (PCM). The PCM interprets the sensor input to determine the crankshaft position. The PCM then uses this position, along with other inputs, to determine injector sequence and ignition timing. The sensor is a Hall effect device combined with an internal magnet. It is also sensitive to steel within a certain distance from it.
Below is a pic of the sensor location.
Good luck.
Regards,

This is a normal problem and you need to replace it asap. The camshaft position determines when top dead center compression of the #1 cylinder occurs and the convertsit into a pulse signal that is sent to the pcm , then the pcm uses it to determine the correct injection sequence.

Actually, On 2006 vehicles the camshaft position sensor senses the TDC point of the number one cylinder, on its compression stroke. Its signal is relayed to the ECM to be used to determine the sequence of fuel injection. The Crank sensor is used to determine RPM ranges The crankshaft position sensor consists of a magnet and coil. The voltage signal from the sensor is relayed to the ECM to indicate engine rpm and the position of the crankshaft. This sensor wouldn't affect your performance but, the Cam sensor will if its damaged. To answer you question correctly, it would be the cam sensor i would check. it actually controls the injection system. if damaged, it will cause performance issues. On 2006 vehicles the crankshaft position sensor is located next to the radiator hose inlet and outlet assembly. On 2006 vehicles, the camshaft position sensor is located on top of the engine, on the engine head cover.