Code P1494

Tiny
STEELERDYNASTY
  • MEMBER
  • 2002 JEEP GRAND CHEROKEE
  • 4.0L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 186,000 MILES
Giving code p1494, but there is no LDP under my driver side headlight. Where else could it be?
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Wednesday, March 14th, 2018 AT 2:52 AM

8 Replies

Tiny
MHPAUTOS
  • EXPERT
The DLP is under the plastic cover under the head light, you will see if if you remove the air filter.
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Wednesday, March 14th, 2018 AT 3:02 AM
Tiny
STEELERDYNASTY
  • MEMBER
There is nothing there. I can fit my whole hand in there and feel the metal frame and there is nothing.
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Wednesday, March 14th, 2018 AT 4:48 AM
Tiny
MHPAUTOS
  • EXPERT
That is very odd, I will look into it a bit further.
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Wednesday, March 14th, 2018 AT 5:23 AM
Tiny
PATENTED_REPAIR_PRO
  • EXPERT
Are you referring to a leak detection pump?
I show it located under the left quarter panel behind the left/rear wheel, shown here.
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Wednesday, March 14th, 2018 AT 7:27 AM
Tiny
STEELERDYNASTY
  • MEMBER
Well this makes me hopeful again. I will check there.

In the event that I need to replace it, what will I need to disassemble to get to it? Something tells me it will not be easy.
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Wednesday, March 14th, 2018 AT 7:47 AM
Tiny
PATENTED_REPAIR_PRO
  • EXPERT
I read that it is held on with plastic rivets.
Remove the vacuum hose from the top of the vent valve (Fig 1 ). Attach a hand vacuum pump to the vent valve and apply 20" Hg. Vacuum. Observe the vacuum for ten seconds. If the vacuum drops below 15.5" Hg. Obtain the appropriate LDP vent valve using the Mopar parts catalog.
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Wednesday, March 14th, 2018 AT 8:01 AM
Tiny
STEELERDYNASTY
  • MEMBER
You were SPOT ON! I replaced the whole assembly as the metal shields had rusted out. NO MORE CODE!

GOOD GUYS WIN! THANK YOU
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Sunday, March 25th, 2018 AT 10:07 AM
Tiny
PATENTED_REPAIR_PRO
  • EXPERT
Great
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Sunday, March 25th, 2018 AT 10:09 AM

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