P0645 on Ford vehicles A fault in the air conditioning clutch relay circuit
P0645 is named on 5 Ford model years (2016–2018): 11 manufacturer filings and 0 owner reports in NHTSA’s files, across Escape, Fiesta, Mustang, Taurus.
Which Ford model years name P0645
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2018 Ford Escape | Electrical System | 4 | — |
| 2017 Ford Escape | Electrical System | 4 | — |
| 2016 Ford Fiesta | Equipment | 1 | — |
| 2016 Ford Mustang | Power Train | 1 | — |
| 2016 Ford Taurus | Power Train | 1 | — |
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.
Ford filings that name P0645
Source: NHTSA manufacturer communicationsBulletins and campaigns Ford filed with NHTSA whose summary names P0645. Quote the document number at the service desk — it is a diagnosis the maker has already written down.
- SSM 47086 Service bulletin2018-02-16 · Electrical System — Wiring
- Some 2017-2018 Escape vehicles equipped with a 1.5L or 2.0L engine and built on or before 24-Jan-2018 may exhibit fuse F34 open, an illuminated MIL with diagnostic trouble codes (DTCs) P0034, P023A, P0245, P0480, P0481, P0645, P06A0, P06DB, P188D, P02602, and/or P2681 in the powertrain control module (PCM). May also exhibit an all-wheel drive (AWD) fault warning and/or traction control (TC) light
- SSM 47467 Service bulletin2018-08-15 · Electrical System
- Some 2017-2018 Escape vehicles equipped with a 1.5L or 2.0L engine may exhibit fuse F34 open, an illuminated MIL with diagnostic trouble codes (DTCs) P0034, P023A, P0245, P0480, P0481, P0645, P06A0, P06DB, P188D, P02602, and/or P2681 in the powertrain control module (PCM). May also exhibit an all-wheel drive (AWD) fault warning and/or traction control (TC) light on. Inspect the 14290 wiring harnes
- SSM 47575 Service bulletin2018-10-10 · Equipment
- Some 2017-2018 Escape vehicles equipped with a 1.5L or 2.0L engine may exhibit fuse F34 open, an illuminated MIL with diagnostic trouble codes (DTCs) P0034, P023A, P0245, P0480, P0481, P0645, P06A0, P06DB, P188D, P02602, and/or P2681 in the powertrain control module (PCM). The vehicle may also exhibit an all-wheel drive (AWD) fault warning and/or traction control (TC) light on. Inspect the 12A690
- SSM-45815 Service bulletin2016-05-11 · Equipment — Appliance — Air Conditioner
- AIR CONDITIONING (A/C) INOPERATIVE - DIAGNOSTIC TROUBLE CODE (DTC) P0645
What P0645 means
Source: SAE J2012 / OBD-IIA fault in the air conditioning clutch relay circuit.
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.
Common questions
Source: NHTSA files and the OBD-II standardIs P0645 a known problem on Ford vehicles?
It is a documented one: NHTSA's files hold 11 manufacturer filings and 0 owner reports naming P0645 on 5 Ford model years (2016–2018). 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 P0645 appear on most?
2018 Escape (4 documents), 2017 Escape (4 documents), 2016 Fiesta (1 document).
Does P0645 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.