2015 chrysler T&C po175 po172
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First, the total trims on both banks in this capture aren't negative enough to set fault codes. That means your lean condition is intermittent and not happening during this capture.
Second, I have a concern with the EVAP purge valve. From your report:
Actual purge current - 0mA
Fuel tank pressure - -.1 PSI
ESIM switch - Closed
The actual purge current indicates that the PCM is not energizing the purge valve. But the fuel tank pressure and the ESIM switch both indicate vacuum in the tank. The PCM could be doing an intrusive EVAP system test. Or, the purge valve could be stuck open and leaking.
A leaking purge could cause intermittent rich fuel trims, especially right after refueling. Are the P0172/P0175 still present? If so, pull the Freeze Frame data and see what the fuel tank level was when the fault codes set.
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So my current scanner will not read a freeze frame.
It actually can, just not under the OEM menu. Under Diagnostics, with all the vehicle manufacturers, there'll be EOBD. Auto Scan, hit OK, then DTC/FFD. If the fault codes are still there, there should be a snowflake shown with one of the fault codes. That's your Freeze Frame.
Unfortunately, the TopScan won't let you save the whole Freeze Frame like the data report. We're mostly just interested in the fuel level for now.
No matter what it always shows a negative amount. What does that mean bad purge valve and is that the whole purge canister.
Never mind it will not post the video it's too large. But basically the value never gets above -.08209. As I drove it around and watched it it never got above the negative value.
That may be another indicator of a failed purge valve? It's tough to say without knowing what the commanded purge current was at the time.
Your Town & Country uses an ESIM system for evaporative system monitoring. There's too much that goes into it for one post, but there's an excellent article here if you want to know more:
www.vehicleservicepros.com/industry-news...084355/chrysler-esim
Is this an indication of something that the purge valve is stuck open and is there another way for me to test that theory.
There's a couple different ways to confirm a bad purge. The easier way would be to:
1. Beginning with the engine off, remove and reinstall the gas cap. This is to vent any pressure/vacuum prior to the test.
2. Turn the ignition on but don't start the engine.
3. Connect the scan tool and monitor the ESIM switch, actual purge current and the fuel tank pressure. Switch should be open, tank pressure should be close to zero.
4. Start the engine and watch the data for 15-20 seconds. If the ESIM closes, that would indicate that the purge is stuck open.
The other way would be to access the purge directly. Getting to it isn't hard, but getting the connector and vapor lines off can sometimes be a hassle. We can keep it non-intrusive for now.
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Do you recall what the actual purge current was when the switch closed? I ask because it's possible after a minute of run time that the PCM will command the purge open. The ESIM switch will close as a result.It ran for about a minute and then the switch says closed instead of open initially when I started it it said open.
I did check the purge valve earlier and it appeared to be closed as there was no vacuum coming from the purge valve to the charcoal line. The charcoal line obviously had vacuum.
So to be clear, the port on the purge valve going to the canister DID have vacuum on it? You'll want to unplug the purge valve electrical connector to make sure the valve isn't being commanded open during the test. You can also use a vacuum gauge if you have any doubts on if you're feeling vacuum.
I was able to grab some pictures of the freeze frame from a different OBD2
Awesome, thank you! The fuel level is high but not exactly a full tank. Which scan tool did you use to retrieve this Freeze Frame?
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Sorry I wanted to be clear.
No worries! I genuinely appreciate it.
I grabbed a picture of the valve for reference:
The one going to the canister is the one with the quick connect fitting. The one that's a pain to get off. The one to the engine is the normal rubber hose.
Unfortunately, testing at the rubber hose won't tell you if the purge valve is leaking. You'll need to get the quick connect end disconnected. Sliding the valve off the bracket might help. Leave the rubber hose connected to the valve and start the engine. Check for vacuum at the canister port.
Sorry I didn't see that ,I got the freeze frame with my Bluetooth zulrich
If/when you get time, let me know what you think of the the Zurich compared to the TopScan. Always interested in new scan tools.
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