P0685 on Dodge: How to Diagnose & Fix
ECM/PCM Power Relay Control Circuit/Open
1 Dodge model · 1 documented issue · 1 critical · $600-$1,500 repair
P0685 on Dodge by model: symptoms, diagnosis and fix
The under-hood TIPM (a fuse/relay/computer combo) is a known failure point on early Journeys, causing a wide array of erratic electrical behavior. Owners report random horn honking, no-start or hard-start conditions, windows and door locks operating on their own, premature battery drain, and the engine stalling while driving. A 2014 defect petition to NHTSA (DP14-004) also alleged TIPM-related under-hood fires.
Common Symptoms
- Random horn honking
- No-start / hard-start
- Windows or door locks operating by themselves
- Premature/repeated dead battery
- Engine stalling while driving
- Dashboard lights flickering
How to Fix
Diagnose via dealer or shop; the typical fix is replacing the TIPM module (commonly the integrated fuel-pump relay). Some shops repair just the failed relay circuit at lower cost, but full module replacement is the lasting fix. Average replacement runs around $1,160.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- 04692305 TIPM rebuild/replacement service
Exact-label early-module option after external circuit diagnosis Fitment: Only when the installed TIPM number/options match Live direct US service/product page when checked
- 68143317 TIPM rebuild/replacement service
Exact-label 2.4L branch after diagnosis Fitment: Match installed label, engine and options Live direct US service/product page when checked
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Sources for this issue (3)
P0685 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P0685 mean on a Dodge?
P0685 stands for "ECM/PCM Power Relay Control Circuit/Open." An open or general fault in the control circuit for the ECM/PCM main power relay. The module cannot properly control the relay that supplies its own switched power. On Dodge it is documented across 1 model: Journey.
What are the most common causes of P0685?
The most common causes of P0685 are: Faulty ECM/PCM power relay, Open in the relay control circuit, Corroded/damaged connectors, Blown fuse, Internal PCM driver fault. The specific cause varies by vehicle.
How much does it cost to fix P0685 on a Dodge?
Published repair estimates on Dodge range from $600 to $1,500 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
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Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.