95 lincoln town car

[nickfromboston]

I have a 1995 lincoln town car that is not moving when i step on the gas! I have had some codes pop up and they were p0131 p0133 p01409 p0102 p0401 p1151 p1150 p0122 i believe this one was from me forgetting to reconnect it. How can one get to the EGR without a problem on this year model?

[Bec-961]

Have you been driving the car much? How about driving it a little different. Try lots of feul injector cleaner and a full tank of premium gas. Drive it a little hard not like you usually do. That may clean things up and your EGR valve won't be sticking. It may run and accelerate a little smoother for you.

[Kitt1993]

[quote=nickfromboston;5988982]I have a 1995 lincoln town car that is not moving when i step on the gas! I have had some codes pop up and they were

p0131 The sensor produces a voltage based on oxygen content in the exhaust. The voltage varies between .1 and .9 Volts, .1 indicating lean and .9 indicating rich. The ECM constantly monitors this voltage while in closed loop to determine how much fuel to inject. If the ECM determines that the O2 sensor voltage was too low (less than .4 Volts) for too long (for more than 20 seconds (time varies with model)), this code is set.

Possible Solutions, Replace O2 Sensor. Or reconnect wires check for break.

p0133 This involves the front oxygen sensor on bank one. This code indicates the engine air fuel ratio is not being adjusted by the oxygen sensor signal or the ECM as expected to do so, or not adjusted as often as expected to do so once the engine is warmed or under normal engine use.
Possible Solutions

The simplest thing to do is to reset the code and see if it comes back.
If the code comes back, the problem is more than likely the front bank 1 oxygen sensor. You will likely wind up replacing it but you should also consider these possible solutions:

• Check and fix any exhaust leaks
• Check for wiring problems (shorted, frayed wires)
• Check the frequency and amplitude of the oxygen sensor (advanced)
• Check for a deteriorating / contaminated oxygen sensor, replace if necessary
• Check for inlet air leaks
• Check the sensor for proper operation

p01409 EVR Control Circuit Malfunction,
Component or System Description
This test checks the electrical function of the EGRVR solenoid. The test fails when the EGRVR circuit voltage is either too high or too low when compared to the expected voltage range. The EGR system must be enabled for the test to be completed.

Possible CausesEGRVR circuit open.
VPWR open to EGRVR solenoid.
EGRVR circuit short to VPWR or GND.
Damaged EGRVR solenoid.
Damaged PCM.


Possible Solution
The EGR vacuum regulator solenoid resistance is between 26 and 40 ohms.


p0102 Basically this means that there is a problem with the Mass Air Flow (MAF) sensor or circuit. The PCM detects that the actual sensor frequency signal is not within a predetermined range of the calculated MAF value for more than 4.0 seconds.

• Inspect for the following conditions:
  An incorrectly routed harness--Inspect the harness of the MAF sensor in order to verify that it is not routed too close to the following components:
  - The secondary ignition wires or coils
  - Any solenoids
  - Any relays
  - Any motors
• A low minimum air rate through the sensor bore may cause this DTC to set at idle or during deceleration. Inspect for any vacuum leaks downstream of the MAF sensor.
• A wide open throttle (WOT) acceleration from a stop should cause the MAF sensor g/s display on the scan tool to increase rapidly. This increase should be from 6-12 g/s at idle to 230 g/s or more at the time of the 1-2 shift. If the increase is not observed, inspect for a restriction in the induction system or the exhaust system.
• The barometric pressure (BARO) that is used in order to calculate the predicted MAF value is initially based on the MAP sensor at key ON.
• When the engine is running the MAP sensor value is continually updated near WOT. A skewed MAP sensor will cause the calculated MAF value to be inaccurate. The value shown for the MAP sensor display varies with the altitude. With the ignition ON and the engine OFF, 103 kPa is the approximate value near sea level. This value will decrease by approximately 3 kPa for every 305 meters (1,000 feet) of altitude.
• A high resistance on the ground circuit of the MAP sensor can cause this DTC to set.
• Any loss of vacuum to the MAP sensor can cause this DTC to set.

p0401 EGR stands for Exhaust Gas Recirculation. It is part of the vehicle emissions system, and is used to reduce combustion temperature and pressure to control Oxides of Nitrogen. There are generally three parts to the EGR system: the EGR Valve, an actuator solenoid, and a pressure sensor EGR (DPFE). These things work together to deliver the correct amount of recirculation based on engine temperature, load, etc. The P0401 code means that OBD detected an insufficient amount of EGR.
A code P0401 most likely means one or more of the following has happened:

• The DPFE (differential pressure feedback EGR) sensor is faulty and needs to be replaced
• There is a blockage in the EGR (tube), most likely carbon buildup
• The EGR valve is faulty
• The EGR valve may not be opening due to a lack of vaccuum

p1151
Lack of HO2S-21 Switch, Sensor Indicates Lean
A HEGO sensor indicating lean at the end of a test is trying to correct for an over-rich condition. The test fails when fuel system no longer detects switching for a calibrated amount of time.
H40 DTCs P1131, P1132, P1151 AND P1152: UPSTREAM HO2S NOT SWITCHING. DTCs P1130 and P1150: FUEL SYSTEM NOT SWITCHING AT FUEL TRIM (RICH OR LEAN)

• Note: It is necessary to address all Continuous Memory Ignition and Misfire DTCs, if received during Continuous Memory testing, before addressing any KOER HO2S DTCs.
  DTC/HO2S Reference List
  • HO2S-11 = DTCs P1131, P1132 and P1130
  • HO2S-21 = DTCs P1151, P1152 and P1150
• Check intake air system for leaks, obstructions and damage.
• Check air cleaner for dirt
  element, air cleaner housing for blockage.
• Verify integrity of the PCV system.
• Check for vacuum leaks.

This code is for the drivers side upstream O2. You first need to check for any intake leaks. You can spray carb cleaner around the intake to check for vacuum leaks. If the engine revs you have found a leak. Also check all PCV and vacuum hoses for leaks. You will then need to monitor the MAF for correct BARO readings.There are a lot of needed tests to determine why you are getting the lean code. Lean codes do not always mean a bad O2.

p1150 - look above
p0122 What does that mean?

A P0122 code means that the the car's computer has detected that the TPS (throttle position sensor) is reporting too low a voltage. On some vehicles that lower limit is 0.17 - 0.20 volts (V).

Did you adjust it when you installed it? If the signal value is less than .17V then the PCM sets this code. Could be an open or a short to ground in the signal circuit. Or you may have lost the 5Volt reference voltage.


Symptoms
Symptoms may include:

* Rough or low idle
* Stalling
* Surging
* No/little acceleration
* other symptoms may also be present

Causes

A code P0122 may mean that one or more of the following has happened:

* TPS not mounted securely
* TPS circuit short to ground or another wire
* Faulty TPS
* Damaged computer (PCM)

Possible Solutions

Some recommended troubleshooting and repair steps are:

* Carefully check the throttle position sensor (TPS), wiring connector, and wiring for breaks, etc. Repair or replace as necessary
* Check the voltage at the TPS (refer to a service manual for your vehicle for specific information). If the voltage is too low that is indicative of a problem. Replace if necessary.
* If recently replaced the TPS may need to be adjusted. On some vehicles the installation instructions call for the TPS to be properly aligned or adjusted, consult a repair manual for specifics.
* If there are no symptoms at all, the problem may be intermittent and clearing the code may resolve the issue temporarily. If this is the case then you should definitely check the wiring to be sure it's not rubbing on anything, grounding, etc. The code may come back.




DID I MISS ANYTHING???

[Kitt1993]

To replace the EGR valve on a 95 LTC with the Cast Intake, there are two ways, Get ahold of a 11mm Gear Wrench and do it from the top. Or If you have a lift, you can drop the exhaust from the bottom and get it that way.

Bryan

[[email protected]]

Originally Posted by nickfromboston

I have a 1995 lincoln town car that is not moving when i step on the gas! I have had some codes pop up and they were p0131 p0133 p01409 p0102 p0401 p1151 p1150 p0122 i believe this one was from me forgetting to reconnect it. How can one get to the EGR without a problem on this year model?

Nick,
On my 95 TC I went thru 2 months of swapping parts to cure code P-0401. First was new plugs and fuel filter, then 4 new o2 sensors, then a new EGR valve and the plastic box dohicky just above it that apparently controls it, which lead me to find a broken pipe from the EGR down to the right bank exhaust pipe, which I replaced. This was all done in the driveway on a set of 12" drive up ramps and a creeper. Finnaly I read a post from 03 that said you need to clean the horse shoe cavity under the cast aluminium elbow just behind the throttle body. Four 10mm bolts and it is off and LORD WHAT A MESS,. The passage, which is horse shoe shaped around the back half of the manifold was LEVEL FULL of carbon and the three little releafs that let the exhaust gas get into the manifold were pluged, as was the access from the EGR. A little digging with a screwdiver and some brake cleaner spray, cleaned it like new. Zero the code by touching THE NEGATIVE BATTERY CABLE TO THE POSITIVE FOR 15 SECONDS, and be on your way with no code....
F.Y.I.
Mike

[[email protected]]

Originally Posted by [email protected]

Nick,
On my 95 TC I went thru 2 months of swapping parts to cure code P-0401. First was new plugs and fuel filter, then 4 new o2 sensors, then a new EGR valve and the plastic box dohicky just above it that apparently controls it, which lead me to find a broken pipe from the EGR down to the right bank exhaust pipe, which I replaced. This was all done in the driveway on a set of 12" drive up ramps and a creeper. Finnaly I read a post from 03 that said you need to clean the horse shoe cavity under the cast aluminium elbow just behind the throttle body. Four 10mm bolts and it is off and LORD WHAT A MESS,. The passage, which is horse shoe shaped around the back half of the manifold was LEVEL FULL of carbon and the three little releafs that let the exhaust gas get into the manifold were pluged, as was the access from the EGR. A little digging with a screwdiver and some brake cleaner spray, cleaned it like new. Zero the code by touching THE NEGATIVE BATTERY CABLE TO THE POSITIVE FOR 15 SECONDS, and be on your way with no code....
F.Y.I.
Mike

Well I just got back from a 500+ mile trip with 1/2 highway and 1/2 city driving, and WA-LA NO CHECK ENG LITE ! What a relief. After swapping out a whole bunch of parts, some of which truly needed to be replaced, the cleaning of the intake passage did the trick. So the rest of you don't go thru what I did, PLEASE do this first !! It may be your only problem, and if you do it first, at least you will know it's clean.
Happy Motoring
mike