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1999 jeep grand throwing code p1781. P1781 it won't reset.

1999 jeep grand throwing...

1999 jeep grand throwing code p1781

Mechanic's Assistant: Just to clarify, what's the exact code? And have you tried to reset it?

P1781 it won't reset

Mechanic's Assistant: What is the model of your '99 Jeep?

Grand cherokee limited

Mechanic's Assistant: Are you fixing your Grand Cherokee yourself? What have you tried so far?

No . I need a estimate and i need some where to take it

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

1 thing at a time for me right now. See how much this cost

Mechanic's Assistant: It can cost anywhere from $10 to $100, depending on the type of issue and how much of the Chrysler Mechanic's time your question is expected to take (how complex and lengthy an answer you require).

Can you tell me where i can take it near me

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Answered in 18 minutes by:
3/13/2018
roybelding
roybelding, ASE Certified Technician
Category: Jeep
Satisfied Customers: 7,728
Experience: My knowledge of Jeeps from the early 60's till present. Love to help people with there issues.
Verified

hello, my name is ***** ***** I will be glad to assist you. please allow me a couple of minutes to gather some basic info.

Roy

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What motor is in your jeep??

Roy

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Customer reply replied 4 months ago
It's the 4.7

Ok, I found it under the 4.7 motor.

This is a electrical issue with the overdrive solenoid circuit. I listed possible causes below.

As far as an estimate, you need to perform the flow chart to determine the failure. it could be as simple as a sensor or solenoid which would relate to about 200 or so.

worse case scenario is wire harness issue which would be time and material in determining where the fault lies.

Roy

SYMPTOM:
P1781-OD PRESSURE SWITCH SENSE CIRCUIT

WHEN MONITORED AND SET CONDITION:
P1781-OD PRESSURE SWITCH SENSE CIRCUIT

When Monitored:
Whenever the engine is running.

Set Condition:
The appropriate code is set if one of the pressure switches are open or closed at the wrong time in a given gear.

POSSIBLE CAUSES
RELATED RELAY DTC'S PRESENT
TRANSMISSION RELAY OUTPUT CIRCUIT OPEN
PRESSURE SWITCH INOPERATIVE
INTERMITTENT WIRING & CONNECTORS CONDITIONS
OD PRESSURE SWITCH SENSE CIRCUIT OPEN
OD PRESSURE SWITCH SENSE CIRCUIT SHORT TO GROUND
OD PRESSURE SWITCH SENSE CIRCUIT SHORT TO VOLTAGE
TCM DEFECTIVE
TRANSMISSION RELAY OUTPUT CIRCUIT OPEN

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Customer reply replied 4 months ago
Okay I'm pretty much aware of that I looked it all up online but I'm wondering if there's someone you can recommend me to that's out in my area Antelope Valley California

I am from central Pa. I have no connections out there.

I suggest you use someone like AAMCO or Cottman as they have nationwide warranties on all there repairs. Get bids before you commit to anything. Using private shops can be risky if they are not familiar with these types of repairs.

Roy

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Customer reply replied 4 months ago
Thank you very much for your time greatly appreciate it sucks not having transportation

I understand

your welcome

Roy

Ask Your Own Jeep Question

Please take a moment and rate my service 3 stars or better. that is the only way the site will pay me for my efforts.

Roy

roybelding
roybelding, ASE Certified Technician
Category: Jeep
Satisfied Customers: 7,728
Experience: My knowledge of Jeeps from the early 60's till present. Love to help people with there issues.
Verified
roybelding and 87 other Jeep Specialists are ready to help you
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thank you

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