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ABS and hand brake lites coming on

8635 Views 8 Replies 2 Participants Last post by  kcrawf
I don't have a manual for my 96 f-150 to look this up. Brakes seem fine, maybe a bit mushy, but my ABS light comes on in non-slick conditions. Also my parking brake light will come on without deploying the parking brake. Have not had time to check this out as it is currently raining on my truck.

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Normally the ABS light comes on when the PCM detects an issue with the ABS and the system is diasabled. The other light may also indicate an issue with the system like low fluid.
I checked the fluid when it stopped raining. The rubber "boot" inside was missing and sitting by the air cleaner. I had the truck in for clutch pedal issues and I think his mechanic checked the wrong fluid resevoir and forgot to put back the "boot". I don't know. The fluid was low; I topped it off and replaceed the "boot" but the lights remain on. Brakes seem to work. I guess I'll need to "reset" these lites as resetting the PCM has no effect. Where?
Before resetting anything you need to know what codes are there first so you can address that/those issue(s) first.
The only code was 0401. Resetting did nothing for these lights. Check engine no longer comes on after the new fuel pump. I scrunched up the "rubber boot" and now the lights are out. FYI Thanks
Very glad to hear your rubber boot was the issue! May be time to find a new mechanic.

Just an FYI, the 0401 is for insufficient flow at the EGR

DTC Code: P0401 Description: Exhaust Gas Recirculation Flow Insufficient Detected Probable Causes:
  1. Sensor or solenoid faulty
  2. Connector terminal contact is damaged or corroded
  3. Wire harness - Check harness for correct voltage, open, short to ground or short to voltage
  4. Update control unit software - Check for the latest control unit update
  5. Powertrain or Engine Control Module faulty
  6. Exhaust leaks or restrictions
  7. EGR components clogged, dirty or leaky
  8. EGR valve damaged/defective
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Lights ABS Brake came back on. Boot is distended again. But most concerning; had no pedal when pressed first time this morning until I pumped it. (Ran a stop sign). Sat all day and pedal is still good? No signs of fluid at any wheels? Pedal is somewhat mushy but dies not slowly sink to floor when pressed hard. Really worried about the total loss of pedal. Ideas??
Sounds like the brakes need to be bled of the air in the system. This is a job that if you're not comfortable with is best left to the professionals with the right tools.

I've bled many brake systems soI'll illicit my daughters "foot" services. All weekend I've had pedal. Still a little soft I think. Can not get it to sink even with heavy pressure. Driving it with lots of room between cars and always pre-pump pedal. No lights and no problem so far. Was thinking of replacing the Master anyway I found the boot was not seated properly and I had had a difficult time replacing the cap last time. Saturday I corrected these issues and think perhaps that contributed to the problem. Still don't know about the one time total loss of brake pedal.
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