2000 Ford Ranger check engine light

Tiny
WHEELCHAIRDUDE49
  • MEMBER
  • 2000 FORD RANGER
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 58,000 MILES
Check engine light came on when it was 90 and humid
today
Did the same thing 3 years ago and replaced both oxygen sensors. Will the heat and humidity make the
CE light come on?
Do you
have the same problem?
Yes
No
Friday, July 23rd, 2010 AT 6:17 PM

18 Replies

Tiny
SATURNTECH9
  • EXPERT
First of all thank you so much for your donation. The best thing to do is go to a auto parts store like auto zone and see what codes you have and let me know what the number's are. The heat and humidity in itself can maybe make problems show up that wouldn't show up other wise. We will know more once we know the code's.
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Friday, July 23rd, 2010 AT 6:46 PM
Tiny
WHEELCHAIRDUDE49
  • MEMBER
I will check the code tomorrow. Raining heavy this evening. I do have an OBD II
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Friday, July 23rd, 2010 AT 6:52 PM
Tiny
SATURNTECH9
  • EXPERT
Sounds good try to stay dry talk to you soon.
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Friday, July 23rd, 2010 AT 7:06 PM
Tiny
WHEELCHAIRDUDE49
  • MEMBER
Code # is P0171 System too lean bank 1.
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Saturday, July 24th, 2010 AT 2:14 PM
Tiny
SATURNTECH9
  • EXPERT
That mean's for some reason that your engine sense's it's running too lean. Most likely you have a vacuum leak which can be difficult to find.A low fuel pressure issue which you would have to get a fuel pressure gauge and see what your fuel pressure was. Or you could have a dirty mass air flow sensor or it could just be bad. The mass airflow sensor is right by your air filter box it's on the tube going into the throttle body. You would remove that and see if there is any oil or residue on the sensor inside the tube. To clean it you would need some cleaner they make to clean them they sell at the auto part's store. To check for a vacuum leak you would need to inspect all the vacuum line's make sure they didn't have hole's crack's split's or not connected. Also you would have to get some carb spray and let the engine idle while you sprayed around the intake manifold vacuum hose's and if the engine stumble's rpm's go up or it die's you have a vacuum leak there. It can be a real pain in the butt to find and fix the p0171 code.
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Saturday, July 24th, 2010 AT 6:10 PM
Tiny
WHEELCHAIRDUDE49
  • MEMBER
Trucks running too good for a vacuum leak. So I will clean the MAF
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Saturday, July 24th, 2010 AT 6:14 PM
Tiny
SATURNTECH9
  • EXPERT
You can give that a try it just best before you replace thing's to rule out the other thing's first. But no harm in trying that.
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Saturday, July 24th, 2010 AT 6:45 PM
Tiny
WHEELCHAIRDUDE49
  • MEMBER
Ok Thanks
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Saturday, July 24th, 2010 AT 7:48 PM
Tiny
WHEELCHAIRDUDE49
  • MEMBER
What's thew procedure for testing maf sensor with
A digital multitester
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+1
Friday, July 30th, 2010 AT 4:08 PM
Tiny
SATURNTECH9
  • EXPERT


http://www.2carpros.com/forum/automotive_pictures/416332_2000_ford_ranger_testing_mass_air_flow_sensor_part1_1.jpg



http://www.2carpros.com/forum/automotive_pictures/416332_2000_ford_ranger_testing_mass_air_flow_sensor_part2_1.jpg



http://www.2carpros.com/forum/automotive_pictures/416332_2000_ford_ranger_testing_mass_air_flow_sensor_part3_1.jpg



http://www.2carpros.com/forum/automotive_pictures/416332_2000_ford_ranger_testing_mass_air_flow_sensor_part4_1.jpg



http://www.2carpros.com/forum/automotive_pictures/416332_2000_ford_ranger_testing_mass_air_flow_sensor_part5_1.jpg



http://www.2carpros.com/forum/automotive_pictures/416332_2000_ford_ranger_testing_mass_air_flow_sensor_part6_1.jpg



http://www.2carpros.com/forum/automotive_pictures/416332_2000_ford_ranger_testing_mass_air_flow_sensor_part7_1.jpg


There you go i would still be looking for a vacuum leak and checking fuel pressure and all that.
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Friday, July 30th, 2010 AT 5:36 PM
Tiny
WHEELCHAIRDUDE49
  • MEMBER
No vacuum leaks, MAF readings are right. Checked fuel
pressure readings. 65 PSI. Still have code number
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Saturday, August 7th, 2010 AT 2:19 PM
Tiny
SATURNTECH9
  • EXPERT
Have you tried clearing the code?If so how fast does the code come back?Also how did you check for a vacuum leak?It's most likely a mass airflow sensor or vacuum leak.
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Sunday, August 8th, 2010 AT 12:29 AM
Tiny
WHEELCHAIRDUDE49
  • MEMBER
I cleared the code and it came back the next day.
Used carb cleaner to check for vacuum leak. Used a voltmeter for the readings on the MAF.
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Sunday, August 8th, 2010 AT 8:50 AM
Tiny
SATURNTECH9
  • EXPERT
The best way to check maf sensor reading is with a scan tool that way you can see what the computer see's. That way you can see if the wiring from maf to the computer is good. Also vacuum leak's can be very hard to find they can be there one min and gone the next. They can very small and very hidden like the brake booster hose or a hard plastic line that only leak's when the engine torque's a certain way. Carb spray is a good way to check for vacuum leak's but some time's they can be so small you need to smoke the engine and watch for the smoke to be sucked into the leak. The maf sensor can read good one min and bad reading's the next. That is a difficult code to fix some time's you have. Just to give you a example the last person I helped with the same code had a 1989 tempo 4cyl and he even replaced the maf sensor he checked for vacuum leak's like 10 time's checked fuel pressure all that. You know what it turned out to be a bad maf sensor the new one he put on was bad. With the ford's stuff like that happens some the aftermarket sensor are bad out of the box.
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Sunday, August 8th, 2010 AT 10:16 AM
Tiny
WHEELCHAIRDUDE49
  • MEMBER
Ok I will have to take it to someone who can scan it and smoke test it.
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Sunday, August 8th, 2010 AT 10:44 AM
Tiny
SATURNTECH9
  • EXPERT
That's probably for the better let me know what they find.
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Sunday, August 8th, 2010 AT 4:50 PM
Tiny
WHEELCHAIRDUDE49
  • MEMBER
Found Problem! Crankcase Hose was Just about melted.
Put on a new hose and cleared the code and it hasn't Come back on!
Thanks for the Help!
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Friday, August 13th, 2010 AT 9:50 PM
Tiny
SATURNTECH9
  • EXPERT
Glad to hear you got it all figured out that's what we like to hear. Thanks for using 2carpros.
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Friday, August 13th, 2010 AT 10:10 PM

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