Check Engine Light - Code Description
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Member
Joined: Jan 2012
Posts: 122
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From: Houston
Year: 2001
Model: Cherokee
Engine: 6 cylinder
Check Engine Light - Code Description
I've been getting an engine light lately so I stopped by AutoZone for a read. Here's my printout.
"PO445"
EVAP, large leak detected.
The ECM has detected a large leak in the EVAP system during system monitor test.
Probable cause
1. Defective, loose or missing fuel cap.
2. EVAP canister broke, hose cracked or not connected.
3. Purge or vent solenoid defective.
4. Vacuum leak at engine.
Anyone been down this road before?
"PO445"
EVAP, large leak detected.
The ECM has detected a large leak in the EVAP system during system monitor test.
Probable cause
1. Defective, loose or missing fuel cap.
2. EVAP canister broke, hose cracked or not connected.
3. Purge or vent solenoid defective.
4. Vacuum leak at engine.
Anyone been down this road before?
CF Veteran
Joined: Nov 2010
Posts: 5,841
Likes: 117
From: In the middle of Minnesota!
Year: 1999
Model: Cherokee
Engine: 4.0
Pretty common emissions code. Definitely start with a new MOPAR gas cap. Gotta eliminate this first before moving onto other more complex possibilities.
Member
Joined: May 2009
Posts: 247
Likes: 2
From: Northern Illinois
Year: 1997
Model: Cherokee
Engine: 4.0L
I've been getting an engine light lately so I stopped by AutoZone for a read. Here's my printout.
"PO445"
EVAP, large leak detected.
The ECM has detected a large leak in the EVAP system during system monitor test.
Probable cause
1. Defective, loose or missing fuel cap.
2. EVAP canister broke, hose cracked or not connected.
3. Purge or vent solenoid defective.
4. Vacuum leak at engine.
Anyone been down this road before?
"PO445"
EVAP, large leak detected.
The ECM has detected a large leak in the EVAP system during system monitor test.
Probable cause
1. Defective, loose or missing fuel cap.
2. EVAP canister broke, hose cracked or not connected.
3. Purge or vent solenoid defective.
4. Vacuum leak at engine.
Anyone been down this road before?
You might be able to see the connection with a good light and mirror without lowering the tank (both of my J-bolts broke). It might be worth 5 minutes of your time to check it out.
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