2001 Jeep Grand Cherokee Diagnostic codes

2001 JEEP GRAND CHEROKEE
Avatar
MICHELLEMCKERCHIE
  • MEMBER
  • 1 POST
P1494 is the diagnostic code. How do I fix this? I know it's the leak detection pump or sw or mechanical fault. What do I need to do to fix this? We have a 2001 jeep grand cherokee laredo. The check engine light come on and we took it to auto zone they said it was P1494 the leak detection pump.
Jun 29, 2013 at 12:39 PM
Advertisement
Avatar
ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
autozone are parts salesman not techs. Codes never identify bad part, just failed systems. I will give you the flow chart for this code.

SYMPTOM
P1494-LEAK DETECTION PUMP SW OR MECHANICAL FAULT

WHEN MONITORED
Immediately after a cold start, with battery/ambient temperature between 40 deg. F and 90 deg. F and coolant temperature within 10 deg. F of battery/ambient.

SET CONDITION
The state of the switch does not change when the solenoid is energized.

POSSIBLE CAUSES
Vehicle History and Service Bulletin Investigation
LDP Switch Sense Circuit Shorted to Ground
Wiring Harness Intermittent
LDP Vacuum Supply
Faulty Leak Detection Pump
LDP Switch Sense Circuit Open
Powertrain Control Module
Jun 30, 2013 at 12:06 AM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Ask a new question

Frequently Asked Problems for This Vehicle