Check engine soon light?

Did you reset the PCM after replacing the sensor
if you didn't you need to do so
disconnect the battery
if the light returned then need the codes

What do u have for code # (P0000)
after resetting

I would suspect bad wire and or ground
check the connector plug and wiring harness
this is the test steps for the code you provided

P0112 (IAT) indicates sensor signal is less than self-test minimum. Minimum signal for IAT and ECT sensor is 0.2 volt. Possible causes for this fault are:
* Circuit grounded in wiring harness.
* Faulty sensor.
* Faulty connection.
* Faulty PCM.

Turn ignition off.
Disconnect wiring harness connector from suspect sensor.
Check for damaged wiring, and repair as necessary.
With scan tester connected, turn ignition on. Using scan tester, access ECT V of IAT V PID. If PID is less than 4.2 volts, go to next step. If PID is 4.2 volts or more,
replace sensor and repeat QUICK TEST.

Check VREF Circuit Voltage At TP Sensor Turn ignition off.
Disconnect TP sensor wiring harness connector.
Turn ignition on. Measure voltage between VREF and SIG RTN at TP sensor wiring harness connector.
If voltage is 4-6 volts, connect TP sensor and go to next step. If voltage is not 4-6 volts,
test CIRCUIT.

Check Signal Circuit For Short To Ground Turn ignition off.
Disconnect suspect sensor.
Disconnect PCM 104-pin connector.
Check for damaged wiring, and repair as necessary.
Leaving PCM disconnected. Measure resistance between test pin No. 38 (ECT) or No. 39 (IAT) and test pins No. 24, 51 and 91. If any reading is less than 10,000 ohms, repair short circuit, and repeat QUICK TEST. If all readings are 10,000 ohms or more,
replace PCM and repeat QUICK TEST.

Lights is in the instrument panel
remove the instrument cluster

need manual CHECK IT @
https://www.2carpros.com/kpages/auto_repair_manuals.htm

Hi there,

This just may be a blown globe or if there has been a problem the previous owner has neglected to fix they may have removed the globe,

Mark (mhpautos)

At 70K I would say no to timing. If the light is on and blinking, I am guessing you have a cylender misfire. To confirm that, take the vehicle to a nationally recognized parts store and have them scan the computer. Most will do it for free. Once they get the code, it will identify what is causing the problem. You may have a bad coil, bad ignition wire, or may just need a basic tune up.

The natural inclination when getting O2 sensor faults is to immediately purchase a new O2 sensor and hope it remedies the fault.

However, there's a couple of issues to consider. If you got the aftermarket (universal) type, they work fine most of the time, just make sure the four O2 wires are hooked up correctly to the vehicle wire harness. There's a 12-volt suppy and ground pair for the heater element inside the O2, and there's a signal and ground pair that the O2 uses to send info to the Powertrain Control Module (PCM).

If you purchased Motorcraft (doubtful based on your 70-bucks statement), they just plug right in and you are more likely to have an "exhaust" related issue if the O2 code comes back.

OK, so now we have the aftermarket vs OEM discussed. Now, we need to know the actual PXXXX number of the fault code. One type leads towards a fault of the O2 internal heater, and the other fault deals with the actual exhast which the O2 is trying to decipher.

Now things get a little more complicated. If the O2 code is exhaust gas related (reading lean or rich), diagnostics and repairs go down different avenues.

Remember, a fully functioning O2 sensor simply reads the exhaust make-up and sends the corresponding signal to the PCM. If the signal is out of range based on PCM anticipated running parameters, the PCM may set an O2 fault code.

Some easy things you could try is to clean the Mass Airflow Sensor (MAF) with spray-brake cleaner to make sure the two little heating elements inside are clean. If they are dirty, it is common to receive an O2 "Lean" code, even though nothing is wrong with the O2 itself. Blow dry the MAF with shop air, being careful not with a full blast to ruin the wire elements.
Dirty MAF elements make the PCM think the engine has a light load, which leads to leaning out the air/fuel mixture, which leads to the O2's saying "Hey! The mixture is Lean!" Up Pops a ChkEngine Code.

Make sure the PCV Valve and hose don't have any cracks; look for various cracked vacuum lines around the engine.
If you want to get really technical, hook up a scan tool, and watch the O2 sensor output on a graph. Voltage should fluctuate rapidly (5+ per second) between.2 and.8 volts at steady high idle, keeping high idle at least one minute to fully warm up O2.

Finally, realize there are four O2 sensors hooked up to the vehicle. There's a B1S1, B1S2, B2S1, and a B2S2. Again, the PXXXX code is critical. Make sure the mechanic replaced the correct one. Bank 1 is the one nearest the firewall. S1 or S2 determines before (1) or after (2) the catalytic converter.

Variables are too lenghty to discuss at this point unless you can provide feedback on items I've touched on thus far.

IF no check engine light on
and if tried to get a state inspection and saying system not ready
keep all you paper work and contact the RMV state vehicle safety & emission division
as they should be able to help in getting to the bottom of it
have to try few to get tested 3 or so times
every time they should give you the print out
right on it the mileage so you can keep track of it
if you have all your paper in order showing you are trying to correct the problem they should not issue you a ticket (I think check with your local state vehicle safety and emission RMV division )

Need codes
scan system for codes and let us know what u have
most locale shops and part store can help u getting the codes

If you can I would drive it to a parts store that will check the codes for you. Many will do it for free, just call around. Just remember a code just points you in a direction it doesn't tell you which part to change. Did the transmission work before? Was it a new or rebuilt transmission? You might call who ever you bought the transmission from and ask them for some help.