Question about 2002 Jeep Grand Cherokee

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P0445 Po445

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Just one word.
ok all pretend a question
what is that, its a DTC.
what does it mean, it means the EVAP vents are failing. or the gas cap is loose.
put the cap on tight, and reset the codes, with any scan tool
then drive see if it comes back.
if yes, a new cap
if still bad, the FSM has the lost weekend of test to find it.
its NON trival if you dont have shop air , and or shop vacuum tests tools. the tank vent system is breached, why ,is obvious.
crackes. in hoses etc.
or the PCM evap testing parts are bad, all this and every single
test is fully covered in any cars FSM, not just jeeps.
get the FSM, and read it.
or login to and read the EVAP chapter.

Posted on Mar 26, 2014


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What is the code po442 and po445 mean on the car

P0442 code means that the control module has detected a small leak in the Evaporative Emission (EVAP). The loose fuel tank filler cap is the most common cause that triggers the P0442 code.

Code P0445 indicates that there is improper purge flow in the EVAP system caused by a shorted purge valve.

Make sure Fuel tank cap is tightened well, then have it tested at Autozone, etc... If ok, then go back to inspection station.

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P0445 - Evaporative Emission Control System Purge Control Valve Circuit Shorted is located in the engine compartment and is most likely the root of the problem.Would check the plug and wiring going to this to verify that no plug or wiring damaged has occurred.It is quite possible the part has gone bad.

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P0411- Means Secondary Air Injection System Incorrect Flow Detected!
Possible causes - Vacuum hoses damaged.
- Air Pump inoperative.
- Air bypass solenoid circuit open.
- Air bypass solenoid leaking/blocked or stuck open/closed.
- Air diverter valve leaking/blocked or stuck open/closed.
- Air air hoses r Possible solution - Visually inspect vacuum lines for disconnects in the AIR systems and visually inspect for proper vacuum line routing. Repair if necessary.
- Disconnect the air pump hose at the solenoid valve, start the engine and see if there is air being pumped P0445- Means Evaporative Emission Control System Purge Control Valve Circuit Shorted! Possible causes - Damage harness or connectors to the Purge Control Valve
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- EVAP canister purge volume control solenoid valve may be faulty
P0445 Description The EVAP canister purge volume control solenoid valve uses a ON/OFF duty to control the flow rate of fuel vapor from the EVAP canister. The EVAP canister purge volume control solenoid valve is moved by ON/OFF pulses from the ECM. The longer the ON pulse, the greater the amount of fuel vapor that will flow through the valve. When is the code detected? - An excessively high voltage signal is sent to ECM through the valve

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Check engine lit on code po442,po445

I have a dodge stratus and the engine light is on and it drives and its as though someone stopped it with a grabbing sensation but its not the brakes they are not involved. i thought the pause and cut off was caused by the transmission but it not that either

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I have a 2004 Jaguar evap control system leak, codes P0445 nd Po447. I have replaced the Gas cap, but light keeps coming on. my Actron tester can send a command to test the evap system,but I don't know...

If your wanting to know what to check. po445 is the purge solenoid control circuit, po447is the evap vent solenoid control circuit.Check the connections, and the wiring for shorts, or replace solenoid. Could also be a failed pcm.

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1 Answer

I have a check engine light on my 2003 chevy truck it reads PO445

P0445 Evaporative Emission Control System Purge Control Valve Circuit Shorted
The Evaporative Emissions System (EVAP) allows fumes from the gas tank to enter the engine to be burned, rather than vented into the atmosphere as an emission. The purge valve solenoid is supplied switched battery voltage. The ECM controls the valve by operating the ground circuit, opening the purge valve at specific times allowing these gasses to enter the engine. The ECM monitors the ground circuit as well, watching for faults. When the purge solenoid isn't activated, the ECM should see a high voltage on the ground circuit. When the solenoid is activated, the ECM should see the ground voltage pulled low, close to zero. If the ECM doesn't see these expected voltages, or senses an open in the circuit, this code is set.
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Emission code po445 on a 2001 dodge stratus

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