What are troubleshooting codes P1684 and P0456?

Chrysler, Dodge, and Jeep Computer Error Codes - Allpar

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A code P1684 shows that the memory has been cleared recently and is not ... P0122Throttle Position Sensor Circuit Low Voltage; P0123 Throttle Position Sensor ... 2Circuit High Voltage; P0189 Fuel Temperature Sensor 2 Circuit Intermittent ...

Running rough, lots o' codes - The Chrysler Minivan Fan Club Forums

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Jun 4, 2010 - 10 posts - ‎4 authors
Sent lots of codes: P1684, P0122, P0118, P0106, P206, P1478, P1598. Can't find anything on the last two, but looks like an electrical prob ...

Dodge Caravan 2003 P1684 P0442 P0455 P0456 - OBD-Codes.com

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Jun 10, 2012 - Your OBD-II Trouble Codes Repair Site. Menu. Home · Trouble Codes... At first it was just the battery code P1684 and the small evap code P0442. Now the other two codes are showing as well. What are the chances that this ...

10127316 WHAT DOES P0122 CODE MEAN? - Download

yes. the rubber gaskets do wear out. on most vehicles the gas cap
should be tightened 'til it"clicks". you probably can't tell from the
"appearance" but if you tighten 'til it clicks then drive for awshile and still
get the same code, the next step is a NEW gas cap/

P1684 The battery has been disconnected within the last 50 starts. P0456 very slight evaporator leak

Hi the p1684 means the battery has been disconnected within the last 50 starts, the P0135 is Oxygen O2 Sensor Heater Circuit Malfunction (Bank1, Sensor1), you may have notived an increase in fuel consumption. and the P0456 code means evaporated emissions system -small leak detected the causes could be either A small leak in any of the EVAP hoses or fuel tank hoses, a small leak in the purge valve or vent valve or the EVAP Canister may be leaking
Hope this helps
Steve

302 is misfire on cylinder 2. Please see my tip at http://www.fixya.com/cars/r6715318-causes_gasoline_engine_misfires .
1684 is battery disconnected, which you caused when you disconnected it--you can ignore that. You probably have an intermittent misfire. Please follow my troubleshooting steps and let me know if you have questions.

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P0700: EATX Controller DTC present
P1684: Battery was desconnected
P0442: EVAP leak monitor medium (.040). Leak detected.
P0455: EVAP leak monitor large. Leak detected.
P0456: EVAP leak monitor small (.020). Leak detected.

I suggest check the lines and flow it down to the ldp (leak detection pump) that is just behind the steering gear under the van It has a wire connector and 2 large EVAP hoses. look for any split or crack then follow the lines back to the tank. Even a small crack is a leak.

Hope helped with this. Remember rated this help. Good luck.

call auto zone they have the code.

P1684 You might have a voltage drop for a second, then the system will pick that up and say that you took off the battery connector. The battery may be going out or the alternator. P0456 may come up if you put gas in the car with the car running. The gas cap my not be working or be put on right. Good luck. ps Check to see if all the wires that have to do with the charging system are tight. everything!

P0442, P0455 AND P0456 are all evaporative leak monitor test failures (small, medium and large leaks). These codes appear anytime the integrity of the air space above the fuel or the lines to/from the vapor canister or purge valve. If there is no damage to the canister, check the lines that run under the van from the fuel tank and canister to the purge valve (under the hood). Also, check to make sure that the hoses are not split or disconnected where they connect to the purge valve. The P1684 is abit more confusing. This is not a valid DTC for your vehicle. It's possible the scanner the shop you went to is an OTC scanner that is reporting a false code. It's also possible they wrote it down incorrectly. The closest thing that makes any sense is a P1486 which would indicate a pinched hose in the same monitor system as the other 3 codes. Best of luck!