Question about 1998 Ford F150 Regular Cab

3 Answers

I have a 98 f-150 5.4 triton showing coads p1131,p1151,p0170,p0174,p0136&p0156 goes on highway ok but idles rough and stalls

Posted by on

  • Anonymous Mar 25, 2014

    5.4 triton, 3v, rough idle, stalls, no power



3 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert whose answer got voted for 500 times.

  • Master
  • 984 Answers

I would start with the Rubber elbow on the back of the intake, next to the IAC.

This has a habit of cracking, and causing unmetered air after the MAFS to get into the system. The closed loop control is not counting it, and the O2 sensors are reporting the lean condition on the back side.

Ignore the IAC notation in this picture ( only 1 I had ) You are going to want to remove the plastic cover on the throttle body, and take a look at the rubber vac line that is shown in this picture.
I have a 98 f-150 5.4 triton showing coads - d7c4687.jpg

The other item could be the intake manifold is loose, but start with the vac lines, clear the code with a scanner, a battery disconnect for 5 min, or 2 driver cycles to see if at least the P0170 & P0174 codes are gone.
The P0136 & P0156 could be a melted wire as mcneb posted about, this is usually by the exhaust manifold. After checking and repairing the vac lines ( if required ) follow the harness from the 2nd set of O2 sensor ( think that is HO2S-12 & -22 if I recall correctly ) to the engine compartment.

Posted on Nov 17, 2009

Testimonial: "That was the problem fixed it and truck runs great! Thank You!"

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

I had the same problem a few years ago. Codes said lean left and right banks. The enbow was the problem. The code can be reset by disconnecting the battery. Codes came back 50miles later. The crack I had was in the inside joint of th elbow. Had to bend it to see it. Easy fix, but $200 at the dealership because I gave up on it too early.

Posted on Dec 30, 2009

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Master
  • 2,418 Answers

The important codes here are the P136 and P0156 these codes have to do with Ox sensors on the left and right exhaust after the catalytic converters. Look for burnt or broken wires, or wires pulled loose from hitting something in the road.

Posted on Nov 17, 2009

1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Good luck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Idling rough after replacing alternator

sounds like you got a smaller amped alt then what was there.

Feb 14, 2013 | 1996 Ford Bronco

2 Answers

2000 Lincoln Navigator - few days ago started idling very rough when truck is at a stop or in park. Service Engine Light came right around time I noticed that it was idling rough when stopped. Following...

P1131 Lack of HO2S-11 Switch ,Sensor Lean
P1151-Lack of HO2S-21 Switch ,Sensor Lean
PO171- System to Lean (Bank 1)
PO174-Systen to Lean (Bank 2)

Fuel Filter -Plugged
Low Fuel Pressure
Evap System -Leaks
Leaks - in ducting,air filter to throttle
PCV -Leaks
Exhaust System -Leaks
O2 Sensors-worn out

Apr 06, 2011 | 2003 Lincoln Navigator

2 Answers

P0136, P1131, and P1151 codes on Ford Expedition 2000 4.6L

Your auto has four O2 sensors. Two upstream and two downstream; With two banks. Bank 1, sensor 1...and bank 2, sensor 1 are the two upstream (exhaust manifold before the catalytic). Bank 1, sensor 2 and bank 2, sensor 2 (other side of catalytic)

Code 1131= upstream; bank 1..sensor 1
Code 1151= upstream; bank 2..sensor 1
Code P0136 (generic code) bank 1..sensor 2 (questionable)

I wouldn't spend the money to purchase 3 sensors. Highly unlikely all three are bad; Cost is about $40/ ea.
Since there isn't a code for the cat's themselves, I would suspect the O2 circuit is malfunctioning. The rough idle is another clue.

Take an ohmmeter set it on X10 scale and measure the resistance from engine to body and body to negative post on battery terminal. You should read zero ohms (full needle deflection). If you do go buy two upstream O2 sensors. If you read
open or a high resistance run two straps from eng. to body...and body to neg.batt. post.


Dec 10, 2009 | 2000 Ford Expedition

1 Answer

Poor idle dtc P1151, P1131,P0174, P0171. runs ok

Change plugs, and Mass Air Flow sensor. This should do the trick

Nov 29, 2009 | 2003 Ford Taurus

2 Answers

2000 Lincoln Navigator with rough idling and service engine light

i had the same trouble, there is a rubber boot under the cover on the top of the motor, it is coming from the egr valve, takes about 5 mins to repair and less than 5 dollars.

Jul 21, 2009 | 2003 Lincoln Navigator

1 Answer

99 f-150 error codes

Try to pin point, (if not already) what the other codes are for. How does the truck run while idling and driving. Also, if the code for one sensor is showing then it's best to go ahead and replace it - it may be bad due to another issue (or code that has shown up as well) and chances are, you'll need to replace the second (if equipped) O2 sensor.

Mar 31, 2009 | 1999 Ford F150 Regular Cab

2 Answers

98 E-250 Rough Idle; codes p0156,p1131,p1151,p0301,p0171,p0174+

po301 thru po306 all misfire codes cylinder 1-6 remove plugs and replace them..... set the plug gap first
i suggest u replace the wires also if they never been replaced all these misfire codes can set the others and one is for the oxygen sensor ( 02s or HO2S) CIRCUT MALFUNCTION do u know how to check wireing systems
do the tune up plugs (set gap) .052-.056 change the fuel filter also. clear the codes hows it run
this info is for 98 E-250 4.2Litre
what engine do u have 4.2L or 4.6L i know it is a v-6 by the codes

Dec 15, 2008 | 2003 Ford E250

Not finding what you are looking for?
1998 Ford F150 Regular Cab Logo

1,131 people viewed this question

Ask a Question

Usually answered in minutes!

Top Ford Experts


Level 3 Expert

78257 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22326 Answers


Level 3 Expert

5653 Answers

Are you a Ford Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides