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Chris (aka- Moose)
Chris (aka- Moose), Technician
Category: Ford
Satisfied Customers: 43873
Experience:  16 years experience
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Po108 code on my 2005 freestar, Check engine light on, Yes,

Customer Question

Po108 code on my 2005 freestar
JA: Tell me a bit more about what's going on so he can help you best.
Customer: Check engine light on
JA: Are you hoping to fix this yourself?
Customer: Yes
JA: Great! What have you tried so far?
Customer: Just the code po108. Map sensor
JA: Is there anything else the Ford Mechanic should be aware of about your Ford?
Customer: No. Runs fine
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Submitted: 7 months ago.
Category: Ford
Expert:  Chris (aka- Moose) replied 7 months ago.

Welcome, I'm Chris (aka Moose). Experts aren't employees / agents of Just Answer. We are independent service providers using the Site to sell their Expert knowledge to Customers. I strive to provide EXCELLENT 5 STAR service, let me know what's needed from me so your pleased.

This code normally ends up being the EGR systems module faulty. This part is on the intake manifold, transaxle side, radiator side.

  1. Verify 5 volts on the Brown/White wire with the key on.
  2. Check for ground on the Gray/Red wire.
  3. Check the Manifold Absolute Pressure (MAP) output on the White/Orange wire. This will vary in voltage from about 4.0 volts Key On Engine Off (KOEO) and about 1-1.4 volts at idle.
  4. If the voltage is not in spec, check the White/Orange wire for a short or break between the EGR and pin 9 of the PCM.
  5. If the wire is OK, replace the EGR system module.

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