Ford Ranger / B-Series :: Engine Hesitates - Got 157 And 158 MAF Sensor Fault?
Feb 1, 2014
Problem: engine surging/hesitation, from idle to highway speeds. It will start and run fine, just hesitates/surges when gas is applied.
Before I pulled the codes, I tried seafoam in the gas tank, cleaned MAF sensor, cleaned throttle body, checked air filter, changed fuel filter, pulled/cleaned plugs, nothing worked.
Then today I finally used a scanner and pulled codes (my CEL doesn't work) and I got 157 and 158 MAF sensor fault, high and low voltage. I am reading about 6v on the C and D terminals of the MAF, I know that is much higher than normal, but what does that tell me? Why both high and low voltage readings? Just a bad sensor, or wherever that voltage comes from, ECM?
I also pulled 189 HEGO H02S sensor fault, unable to switch/lean during part throttle. What does that mean, just a bad O2 sensor?
Last I pulled a 542, fuel pump secondary circuit fault. Does that mean the fuel pump is bad or going bad?
More importantly, what should I troubleshoot first, would any of these codes cause my problem?
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I need to know what the wire colors are for a engine temperature sensor connector (2-wire) are and the correct wiring diagram to get the temperature gauge to work again
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Having a slight issue with my ranger. So I bought this truck out of a junkyard about a month ago, its a 94 4x4 with a 4.0 and a five speed. When I bought the truck the motor was blown so a few weeks ago i replaced it with a 4.0 from an aerostar van I had laying around. Right after I changed it the truck was running good with no issues, until a few days ago going to work the truck started hesitating going up a hill. Now the truck does it all the time, sitting at idle the truck runs smooth as silk, at half throttle it does it the worst but when you mash the peddle to the floor it clears up and runs good.
So far I've replaced the plugs, wires, coil pack, mass air sensor, throttle position sensor, and the fuel pressure regulator to try and fix it but nothing has worked. I've checked the fuel pressure it has 30 at idle and 40 with the vacuum hose pulled off of the regulator, I even taped the gauge to the windshield and went for a ride and there was no drop in pressure when it started acting up. a few other things i have done were plugged all the vacuum ports to rule out a leak, reset the computer and checked for codes. the only code that came up was 522. So I think my next step is going to be buy new oxygen sensors ? But my question is wouldn't the check engine light come on if it was an oxygen sensor ?
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I have a 1999 Ford Ranger and every morning when I go out to start it, it really hesitates and doesn't want to run for a few minutes. once it's going it's fine I can shut it right off and it starts fine, and I can leave it all day from 9am to 6pm and start it again at 6pm and it doesn't hesitate, it fires right up.. it seems like it only happens over night..
When I hooked the code reader up, I get codes P0171 (too lean bank one) & P0174 (too lean bank two)
I also get for the I/M readiness status, that the
EVAP - NOT RDY,
O2S - NOT RDY,
HO2S - NOT RDY
Just want to say also that the shop I had put 2 oxygen sensors in not long ago.=
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02 ranger 4.0 v6 auto has 110000 miles on it. at highway speeds 65-70mph feels like it strugles to shift, truck will shake and bounce some. when this happens rpm's jump from about 2200 to 3000-3200 after a little bouncing rpms drop to normal. issue seems to be the worst going up hill but will happen every time i hit 65-70. Also the truck will not bounce or shake with the OD turned off and seems to run fine this way.
tranny fluid/ filter just replaced with no change. new plugs and wires
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Mine has a strange issue. 1990 xlt 2.9L manual 4x4. When first start of the day, after start I push accelerator and it has a hesitation like not getting fuel. Where start?
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1999 Ranger 4x4 4.0 - P0135 O2 Sensor Heater Circuit (Bank 1 Sensor 1)
I have replaced the 02 Sensor, Passenger Side (Pre-Cat), with a Motorcraft DY831...
I reset the Check Engine fault codes, and took it out for a 50 mile journey... Check Engine light is back on, with the same exact code... What next?
I understand that it may be a fuse, and/or it may be a short in the wiring... Exactly how to test the wiring from the connector at the 02 Sensor all the way back to wherever I need to test?
I really need detailed directions, like wire colors, voltage required, or ohms, or whatever is included in this process...
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1997 2.3 5 Speed. My poor truck is having a hard time shifting into gears. I have bled the master off the truck with the correct method, bled it on the truck with the hose on the slave method while pushing the pedal and multiple times with no bubbles coming out at all, no leaks, etc.
Here's the breakdown -
- Clutch, slave cylinder and shifter bushings replaced about 3 years ago (everything has less than 7000 miles on it)
- While driving and pushing in the clutch, it clearly disengages, although quite a ways down.
- Only shifts hard while running. If I sit with it off with the clutch in, I can shift through all the gears with no effort whatsoever. At times while driving, it gets so hard to shift that it may become dangerous.
- Only things I haven't replaced are the master cylinder and the flywheel.
Should I just assume a bad master and just replace it? It's the original with 188,200 miles on it.
Forgot to mention there are times that when I am at a standstill trying to go into reverse, it grinds like the transmission is still engaged.
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I have 2008 mazda B2300 pickup with P1633 fault code. Is this a mazda code (battery overcharge) or ford code (KAM voltage low) since it's a re-badged ranger? Alternator output measured at battery is 14.4 vdc.
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My 2011 Ranger with a factory Sirius satellite receiver has started showing "SAT FAULT". Checked all the usual things like: Fuse, power, connections, & antenna.
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I recently picked up a 2000 jetta vr6 for a very good price its a glx I have owned a vr6 before and done timing chains myself on it this one is a glx , I am having 5 fault engine codes on my vagcom they are cam position sensor , knock sensor, secondary injection pump, and mass air flow it ran fine 100 miles yesterday this morning the epc came on then went off and ran bad can these codes all be related or do I have to replace each sensor individually..
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So here is what I got. Code 157 maf sensor below minimum voltage. Here is what the truck does. When the MAF is plugged in and I step on it, the truck surges and when it drops below 1k rpm it dies but I can start it back up. If I hold the throttle at 1k it stays alive. When I drive with the MAF unplugged it runs better no surging but it still dies. Here is what I have done. Reset codes no change, put new MAF in no change. I have traced all 4 MAF wires checked continuity from inside of plug to inside of plug.
All wires checked out good. No cuts breaks or anything. I have checked my battery, starter, and alternator ad all check out fine. I read that someone said if the corresponding transistor in the PCM took a dumb then it would cause not enough voltage to get to the plug because the transistor would dump the voltage from the battery leading to the MAF. I thought about running a direct power source from the battery to the voltage side of the MAF with a switch in the truck to just see if that would solve the issue but I don't know if that is possible or smart.
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I just bought a new truck. Its got some...well hacking done to it.
Previous owner did some "stuff" to the o2 sensor wiring.
Also installed a cat back new exhaust.
Should there be another O2 sensor after the final cat?
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Just checked SES code and read P0162 I think. Stated rich fuel mixture bank 1 & bank 2 (3.0) Is this an O2 sensor or MAP issue?
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Where the temp sensor for the rear view mirror is located. My truck is a 2011 Ranger with the 4.0 liter, AC, automatic and 4x4. I think it is somewhere by the headlights but not sure.
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My check engine light came on about a week ago and was unsure what the problem was. So I tested the codes and it said that the camshaft position sensor was bad. So I have tried finding this sensor but little to no luck. I was unsure if it was the 2 or 3 pin, but after looking at some pictures of the engine I'm thinking it is a 2 pin. I attached two pictures of what I think might be the sensor? But I am unsure. This was right next to the timing belt cover, which is where it said it was located. I have a 1996 Ford Ranger, 2.3L.
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I removed what I could, plastic cover and thermostat housing. Looks like I have to pull the intake to get the little bugger out of there. What's the procedure to remove and replace?
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I have a 2006 Ranger 2.3l 4 cylinder that is have emissions problems the code the tech gave me was P2195 an I bought the o2 sensor just where it is, and the auto stores didn't have a manual for the year of my truck.
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I have a 2009 Ranger 2.3 L manual with about 100000 miles. The engine was bogging down and I just found out that the MAF sensor is bad from testing it. In the process, I measured my fuel pressure to be 73 psi (manual says 60-65 psi). So I have two questions:
a.) Is there any chance of just cleaning the MAF sensor. The sensor has zero volts when running and warm (or .02 v) and barely changes when reving the throttle.
b.) Perhaps then the high fuel pressure is an unrelated issue. Is this so high that I must change the regulator as I have to change the pump as well? Might it be some other issue than the regulator which is what the Hayness manual says?
One theory I had for the high fuel pressure is that the bad MAF was leading to bogging and lean conditions and the computer was running the pump more to compensate but I think the computer might run the pump based on fuel pressure not the o2 sensor.
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acts like abs sensors could be bad. but the brake pedal goes almost to the floor, after it does it's pulsating. But the abs light does not come on. I already changed brake booster, no change!
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2001 3.0 XLT Ranger 2wd 4 door
Okay getting ready to trade in my Truck. So I removed all the extra things I put on there while I was in college, the amp, fog-lights, and analog oil pressure sensor along with their wiring. It was pretty easy minus removing the oil pressure sending unit part.
I had to unplug the MAF to move the intake out of the way while I was repairing a loose vacuum tank. But I forgot to plug it back in when i closed everything up. I started the truck and drive it about a half mile before I was able to pull over and plug it back in. Truck ran and shifted fine after that, but the CEL came on. P0119 Coolant Temp Signal Intermittent. Guy at Autozone said it was Intake Air Temp Sensor intermittent and I could just replace the part, but they were showing a separate part even though it is built into our MAFs.
So now the CEL is on, can get it to go away. Truck is a little jerky every once in a while, like a misfire, when between 50 and 60. Before all this the CEL was off. Now after I cleaned it up and removed some of the superfluous accessories, I get a CEL. I wanted to trade it in this coming weekend without having to take a loss because of the CEL or spend more money to fix it.
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