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Diagnostic trouble code · Ford

C3239 on Ford vehicles

C3239 is named on 16 Ford model years (2018–2022): 81 manufacturer filings and 0 owner reports in NHTSA’s files, across Explorer, F-150, Transit, Expedition.

Chassis 16 model years 81 manufacturer filings

Which Ford model years name C3239

Source: NHTSA manufacturer communications and complaints
Model yearFiled underBulletinsOwner reports
2018 Ford ExplorerElectrical System10—
2019 Ford ExplorerElectrical System9—
2018 Ford F-150Electrical System6—
2018 Ford TransitElectrical System6—
2021 Ford ExplorerElectrical System5—
2020 Ford ExplorerElectrical System5—
2019 Ford F-150Electrical System5—
2019 Ford TransitElectrical System5—
2021 Ford ExpeditionElectrical System4—
2020 Ford ExpeditionElectrical System4—
2020 Ford F-150Power Train4—
2020 Ford TransitElectrical System4—
2019 Ford ExpeditionPower Train4—
2018 Ford ExpeditionElectrical System4—
2022 Ford ExpeditionElectrical System3—
2022 Ford TransitElectrical System3—

A model year is listed because the code is named in its own record — a bulletin filed against it, or an owner’s complaint about it — not because every one of these vehicles sets it. Counts are documents in NHTSA’s files, not failure rates.

Electrical System 60 Power Train 20 Fuel/Propulsion System 1
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Ford filings that name C3239

Source: NHTSA manufacturer communications

Bulletins and campaigns Ford filed with NHTSA whose summary names C3239. Quote the document number at the service desk — it is a diagnosis the maker has already written down.

What C3239 means

Source: SAE J2012 / OBD-II

C3239 is a manufacturer-specific code: the second character is a 3, which under the OBD-II standard hands the definition to whoever built the vehicle. The same code can mean one thing on a Ford and something unrelated on a Hyundai. Any site that prints a single definition for it is guessing.

A stored code names the test that failed, never the part that caused it. The record above is what Ford and its owners have filed about it; the code’s page across every make has the whole file.

From here

Common questions

Source: NHTSA files and the OBD-II standard

Is C3239 a known problem on Ford vehicles?

It is a documented one: NHTSA's files hold 81 manufacturer filings and 0 owner reports naming C3239 on 16 Ford model years (2018–2022). Whether it is a problem on one particular car is a diagnosis, not a count — but a bulletin that names the code on your model year is the place to start.

Which Ford models does C3239 appear on most?

2018 Explorer (10 documents), 2019 Explorer (9 documents), 2018 F-150 (6 documents).

Does C3239 on a Ford mean it is recalled?

No. Recalls are filed by campaign and matched by VIN; no recall is triggered by a scan tool. Check the VIN at nhtsa.gov/recalls, or open the model year's page here for the campaigns filed against it.