check engine light

[Ski]

Ok, I took my bronco in to have the codes read and they said it was the ICM and O2 sensor.....now I have to get the dang thing inspected and it will fail!! I need this on the road asap. Now here is the thing, I have checked everything but the computer and everything checks good. TSP--checked good, timing--checks good, I have excellent compression, as good gas mileage as can be expected-- 11.9MPG, I swapped my O2 sensor--bank one sensor one, and I still have the check engine light, and I still have this weird surging that goes on at around 20-30 MPH. ***????????

Any thoughts?

 

[steechfinger]

this may sound crazy but have u checked ur fuel filter it could be clogged that could make it surge or maby the rollover valve on the gas tank. mine surges kinda like that when my rpm is over 3500 but surge i mean it ******* halls ass haha it s like a rocket u cant even tell it weighs 6000 pounds but i dont have a engine light on sorry if that dident help

 

[firelt90bronco]

I didn't even know mine had a check engine light. I figured it would have been on all the time from what I did to it.

 

[wtfdissux]

what year is your truck in NY the only way the light will fail is 96 and newer (when OBD II became mandatory)

 

[snowman74]

Have the fuel pressure checked. It's the shrader valve on the fuel line. If your fuel pressure is fluctuating, it could be the fuel pressure regulator which is close to the firewall on the fuel rail. It's a bitch to change out, because the three screws holding it on are allen head, and ***** in from underneath. Also...just maybe...the MAP sensor is bad.

Snowman74

 

[wtfdissux]

check anything before you replace it otherwise you are wasting time and money also you can verify the codes yourself and not waist allot of effort get a chiltons book and follow the steps to get the codes then search online for the trouble code flow chart for the codes you got and go through them step by step don't skip any no matter how dumb they may sound also the first code given is the first one you check and so on they come in order of importance and only after going through the charts and being told to do so do you replace parts

the chance of the "computer" being "bad" are low it can happen but they are usually the last thing to fail

 

[miesk5]

yo

What were the DTC's?

If they didn't give you them, go to AutoZone for a free OBD II DTC check and write the codes down and come back here for diagnosis tests.

for example P0351 Through P0360

P0351 Through P0360 - : Each ignition primary : * Open or short in :

: Ignition Coil A : circuit is : Ignition START/RUN :

: through J Primary/ : continuously : circuit :

: Secondary Circuit : monitored. The test : * Open coil driver :

: Malfunction : fails when the PCM : circuit in harness :

: : does not receive a : * Coil driver circuit :

: : valid IDM pulse signal : shorted to ground :

: : from the ignition : * Damaged coil :

: : module (integrated in : * Damaged PCM :

: : PCM). : * Coil driver :

circuit shorted to PWR

 

[Ski]

I actually did write the codes down, just cant find where I wrote them down at now. Ihad them checked twice, once at autozone, and again at the base auto skills center. Got two different sets of codes. I have checked my fuel flow and it seems good, I changed my fuel pump/sender. I am curious about the MAP but have no idea where it is. I have checked my Haynes manual but it sucks for some things on my truck. For example when I went to check my TSP the book didnt talk about it or where it was. I had to just figure it out. So if anyone has an idea where the MAP is on a 96 351W please let me know.

I love my Bronco but I am getting frustrated!!

 

[miesk5]

ok, get the doggies out to search for the codes.

No MAP sensor is used on our 96 MAF sensor equipped bronco 5.0 or 5.8

 

[snowman74]

ok, get the doggies out to search for the codes.

No MAP sensor is used on our 96 MAF sensor equipped bronco 5.0 or 5.8

Oops! My bad...I didn't even pay attention to the year |-)

Snowman74 >-

 

[Ski]

ok, get the doggies out to search for the codes.

No MAP sensor is used on our 96 MAF sensor equipped bronco 5.0 or 5.8

Ok I found my little post it that I THOUGHT I wrote the codes on BUT........I didnt write the codes I wrote down what the codes were for. I dont think it will be much help, it wasnt for me.....but then I am new to this idiot light stuff. I am used to just as long as it runs good, your good. So anyway here it is.

O2 Sensor-- which I think I replaced the correct one, and dont think it is causing the surging.

Ignition Coil-- didnt change it.

Spark Output Spout ICM

Ignition Control Module-- No friggen idea where this is!

and that is all I gots

 

[mbtech2003]

if u swaped the oxygensensor to another bank then that bank will most lickly keep the check engine light on... do what i did and clear the light by disconnecting the battery and then go directly to the inspection station and get it to pass. make sure the engine is fully warmed up before u pull the ground on the battery. it should work. well it worked when my 96 geo prizm had a bad egr valve and the check eng. light keeped coming back on. i pulled the battery cable and went and got a sticker and it passed then half a block up the road it came back on :^o

oh and replace all of the oxygen sensors if one goes bad then the others will soon follow. i just replaced the one on my 95 bronk and what a difference in how it runs. but then again it is speed density and doesn't have a way to read the air going in to the engine like yours does in a 96 with mass air flow sensor. good luck to u hope it passes :wacko:

 

[Ski]

if u swaped the oxygensensor to another bank then that bank will most lickly keep the check engine light on... do what i did and clear the light by disconnecting the battery and then go directly to the inspection station and get it to pass. make sure the engine is fully warmed up before u pull the ground on the battery. it should work. well it worked when my 96 geo prizm had a bad egr valve and the check eng. light keeped coming back on. i pulled the battery cable and went and got a sticker and it passed then half a block up the road it came back on :^o

oh and replace all of the oxygen sensors if one goes bad then the others will soon follow. i just replaced the one on my 95 bronk and what a difference in how it runs. but then again it is speed density and doesn't have a way to read the air going in to the engine like yours does in a 96 with mass air flow sensor. good luck to u hope it passes :wacko:

I bought a new one and swapped it out, disconnected my battery and the light stayed on. So I swapped the good one I had just put in with the one in bank 2, well........lets just say I will never be able to use that sensor again......the light stayed on. At 50 bucks a pop and I believe I have 4 of them, I cant afford to go buying all new ones right now. So that will have to wait a little bit. I dont think that would have anything to do with my engine surge problem however.

 

[wtfdissux]

for the surge try removing the IAC and cleaning it out with carb cleaner or similiar my idle was erratic to say the least and that brought it right back to 750 in nuetral

also try th seafoam idea (into the vacuum booster line for the brakes, put the hose into the can and let it **** it in until it stalls out or gets empty then let it sit for a good couple of hours the take it for a good ride but be warned it will send some of the worst smelling and looking exhaust fume cloudsimaginable have heard of people calling fire dept. when this happens so once it starts get out on the road and go by those people's houses you dont care for and lay on the pedal...lol)

also replace wires plugs and cap/rotor and air filter and fuel filter should do the trick for the surge and may be the o2 problem as well due to the crud in the egr and iac will affect how the computer thinks the o2 should be

 

[miesk5]

I bought a new one and swapped it out, disconnected my battery and the light stayed on. So I swapped the good one I had just put in with the one in bank 2, well........lets just say I will never be able to use that sensor again......the light stayed on. At 50 bucks a pop and I believe I have 4 of them, I cant afford to go buying all new ones right now. So that will have to wait a little bit. I dont think that would have anything to do with my engine surge problem however.

ok, go back & get the codes checked again and come back;

to save your hard-earned $ & time, there are different OBD II Codes for the diff. O2 sensors; such as:

P1128 - Upstream Oxygen Sensors BEFORE CAT CONVERTER, below headers

P1129 - Downstream Oxygen Sensors AFTER CAT CONVERTER between cat & muffler on one side, etc.

Ok, where are these *****'s? SEE FORD TSB 01-9-7

DRIVEABILITY - HO2S (HEATED OXYGEN SENSOR), CATALYST, AND FUEL SYSTEM MONITORS - SERVICE TIPS - OBD II VEHICLES ONLY

1996 BRONCO & many other types

http://v8sho.com/SHO/TSB0197HO2SServiceTips.htm

see figures in TSB for locations: http://v8sho.com/SHO/images/TSB/T10907usen...a.gifgenref.gif

-----------

Some codes NOT LIKELY but I figured, what the heck? & possible causes for you since we'll be away for awhile:

P1130 - Lack of HO2S-11 Switch

Short to VPWR in harness or HO2S

Water in harness connector

Open/Shorted HO2S circuit

Corrosion or poor mating terminals and wiring did you ck the connector contacts?

Damaged HO2S

P1129 - Downstream Oxygen Sensors Swapped from Bank to Bank (HO2S-12-22) The HEGO monitor checks and determines if the HO2S signal response for a fuel shift corresponds to the correct engine bank. The test fails when a response from the HO2S(s) being tested is not indicated. Crossed HO2S harness connectors (downstream).

Crossed HO2S wiring at the harness connectors (downstream).

Crossed HO2S wiring at the 104-pin harness connectors (downstream).

P1131 - Lack of HO2S-11 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 the fuel control system no longer detects switching for a calibrated amount of time. See Possible Causes for DTC P1130

P1132 - Lack of HO2S-11 Switch, Sensor Indicates Rich A HEGO sensor indicating rich at the end of a test is trying to correct for an over-lean condition. The test fails when the fuel control system no longer detects switching for a calibrated amount of time. See Possible Causes for DTC P1130

P1137 - Lack of HO2S-12 Switch, Sensor Indicates Lean The downstream HO2S sensors are forced rich and lean and monitored by the PCM. The test fails if the PCM does not detect the output of the HO2S in a calibrated amount of time. Pinched, shorted, and corroded wiring and pins

Crossed sensor wires NOT LIKELY

Exhaust leaks

Contaminated or damaged sensor

P1138 - Lack of HO2S-12 Switch, Sensor Indicates Rich See DTC P1137

P1150 - Lack of HO2S-21 Switch, Fuel Trim at Limit See DTC P1130

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 control system no longer detects switching for a calibrated amount of time. See Possible Causes for DTC P1130

P1152 - Lack of HO2S-21 Switch, Sensor Indicates Rich A HEGO sensor indicating rich at the end of a test is trying to correct for an over-lean condition. The test fails when the fuel control system no longer detects switching for a calibrated amount of time. See Possible Causes for DTC P1130

P1157 - Lack of HO2S-22 Switch, Sensor Indicates Lean See DTC P1137

P1158 - Lack of HO2S-22 Switch, Sensor Indicates Rich See DTC P1137

P0141 - HO2S Sensor Circuit Malfunction (HO2S-125) See DTC P0135

P0151 - HO2S Sensor Circuit Out of Range Low Voltage (HO2S-21) See DTC P0131

P0153 - HO2S Sensor Circuit Slow Response (HO2S-21) See DTC P0133.

P0155 - HO2S Sensor Circuit Malfunction (HO2S-21) See DTC P0135

P0156 - HO2S Sensor Circuit Malfunction (HO2S-22) See DTC P0136

P0161 - HO2S Sensor Circuit Malfunction (HO2S-22) See DTC P0135

P0171 - System to Lean (Bank 1) The Adaptive Fuel Strategy continuously monitors fuel delivery hardware. The test fails when the adaptive fuel tables reach a rich calibrated limit. For lean and rich DTCs:

etc

-----------

& some non-"bad parts" codes that has caused grief for many folks as well as non-informed (I'm being kind here) "technicians"

P1127 - Exhaust Not Warm Enough, Downstream Sensor Not Tested The HEGO monitor uses an exhaust temperature model to determine when the HO2S heaters are cycled ON. The test fails when the inferred exhaust temperature is below a minimum calibrated value. Engine not operating long enough prior to performing KOER self-test.

Exhaust system too cool.

 

[Ski]

ok, go back & get the codes checked again and come back;

to save your hard-earned $ & time, there are different OBD II Codes for the diff. O2 sensors; such as:

P1128 - Upstream Oxygen Sensors BEFORE CAT CONVERTER, below headers

P1129 - Downstream Oxygen Sensors AFTER CAT CONVERTER between cat & muffler on one side, etc.

Ok, where are these *****'s? SEE FORD TSB 01-9-7

DRIVEABILITY - HO2S (HEATED OXYGEN SENSOR), CATALYST, AND FUEL SYSTEM MONITORS - SERVICE TIPS - OBD II VEHICLES ONLY

1996 BRONCO & many other types

http://v8sho.com/SHO/TSB0197HO2SServiceTips.htm

see figures in TSB for locations: http://v8sho.com/SHO/images/TSB/T10907usen...a.gifgenref.gif

-----------

Some codes NOT LIKELY but I figured, what the heck? & possible causes for you since we'll be away for awhile:

P1130 - Lack of HO2S-11 Switch

Short to VPWR in harness or HO2S

Water in harness connector

Open/Shorted HO2S circuit

Corrosion or poor mating terminals and wiring did you ck the connector contacts?

Damaged HO2S

P1129 - Downstream Oxygen Sensors Swapped from Bank to Bank (HO2S-12-22) The HEGO monitor checks and determines if the HO2S signal response for a fuel shift corresponds to the correct engine bank. The test fails when a response from the HO2S(s) being tested is not indicated. Crossed HO2S harness connectors (downstream).

Crossed HO2S wiring at the harness connectors (downstream).

Crossed HO2S wiring at the 104-pin harness connectors (downstream).

P1131 - Lack of HO2S-11 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 the fuel control system no longer detects switching for a calibrated amount of time. See Possible Causes for DTC P1130

P1132 - Lack of HO2S-11 Switch, Sensor Indicates Rich A HEGO sensor indicating rich at the end of a test is trying to correct for an over-lean condition. The test fails when the fuel control system no longer detects switching for a calibrated amount of time. See Possible Causes for DTC P1130

P1137 - Lack of HO2S-12 Switch, Sensor Indicates Lean The downstream HO2S sensors are forced rich and lean and monitored by the PCM. The test fails if the PCM does not detect the output of the HO2S in a calibrated amount of time. Pinched, shorted, and corroded wiring and pins

Crossed sensor wires NOT LIKELY

Exhaust leaks

Contaminated or damaged sensor

P1138 - Lack of HO2S-12 Switch, Sensor Indicates Rich See DTC P1137

P1150 - Lack of HO2S-21 Switch, Fuel Trim at Limit See DTC P1130

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 control system no longer detects switching for a calibrated amount of time. See Possible Causes for DTC P1130

P1152 - Lack of HO2S-21 Switch, Sensor Indicates Rich A HEGO sensor indicating rich at the end of a test is trying to correct for an over-lean condition. The test fails when the fuel control system no longer detects switching for a calibrated amount of time. See Possible Causes for DTC P1130

P1157 - Lack of HO2S-22 Switch, Sensor Indicates Lean See DTC P1137

P1158 - Lack of HO2S-22 Switch, Sensor Indicates Rich See DTC P1137

P0141 - HO2S Sensor Circuit Malfunction (HO2S-125) See DTC P0135

P0151 - HO2S Sensor Circuit Out of Range Low Voltage (HO2S-21) See DTC P0131

P0153 - HO2S Sensor Circuit Slow Response (HO2S-21) See DTC P0133.

P0155 - HO2S Sensor Circuit Malfunction (HO2S-21) See DTC P0135

P0156 - HO2S Sensor Circuit Malfunction (HO2S-22) See DTC P0136

P0161 - HO2S Sensor Circuit Malfunction (HO2S-22) See DTC P0135

P0171 - System to Lean (Bank 1) The Adaptive Fuel Strategy continuously monitors fuel delivery hardware. The test fails when the adaptive fuel tables reach a rich calibrated limit. For lean and rich DTCs:

etc

-----------

& some non-"bad parts" codes that has caused grief for many folks as well as non-informed (I'm being kind here) "technicians"

P1127 - Exhaust Not Warm Enough, Downstream Sensor Not Tested The HEGO monitor uses an exhaust temperature model to determine when the HO2S heaters are cycled ON. The test fails when the inferred exhaust temperature is below a minimum calibrated value. Engine not operating long enough prior to performing KOER self-test.

Exhaust system too cool.

Thank you for this information. A world of info here. It actually helped me out cause now I remember that my original code for the O2 sensor was P0133. I am going to take it back to the base auto skills center and have them run the codes again.

 

[Ski]

Update, I went and had the codes read again and got new codes.

P1351 and P1359 From what I understand this is either the ignition module or the PCM. Can someone please help me out here. The P1359 is SPOUT sent by a digital signal from the PCM, so is that fault code part of the first and lead me to the PCM? Or can the SPOUT be control by the Ignition Module as well???

 

[steechfinger]

word of advice just put in a whole aftermarket ignition system cuz you gonna spend just as much trying to figure out just whats wrong . just say **** it and upgrade with the msd distributer and ignition module and wires and throw in some new plugs while ur at it then there cant be anyproblems haha. cuz ive wasted a shit load of time and money just because of a stupid pickup in my distributer when i could have just bought a whole new system that better and just tore my engine up once not 10 times

 

[Ski]

Ok I took a pic cause I have no clue where my PCM is, in the pic there are actually 4 "boxes" the one on the far right is the Ignition Control Module mounted on the left wheel well, so using that as a reference point can someone tell me what the next three components are??