P0842
0 owner reports and 157 manufacturer filings across 33 model years from Ford, Mazda, Subaru.
Where P0842 shows up
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports | Parts |
|---|---|---|---|---|
| 2016 Mazda CX-5 | Power Train | 15 | — | |
| 2016 Mazda Mazda3 | Equipment | 15 | — | |
| 2016 Mazda Mazda6 | Equipment | 15 | — | |
| 2016 Mazda CX-3 | Engine | 8 | — | |
| 2018 Mazda CX-3 | Power Train | 5 | — | |
| 2017 Mazda CX-3 | Power Train | 5 | — | |
| 2018 Mazda CX-5 | Power Train | 5 | — | |
| 2017 Mazda CX-5 | Power Train | 5 | — | |
| 2018 Mazda CX-9 | Power Train | 5 | — | |
| 2017 Mazda CX-9 | Power Train | 5 | — | |
| 2016 Mazda CX-9 | Power Train | 5 | — | |
| 2018 Mazda Mazda3 | Power Train | 5 | — | |
| 2017 Mazda Mazda3 | Power Train | 5 | — | |
| 2018 Mazda Mazda6 | Power Train | 5 | — | |
| 2017 Mazda Mazda6 | Power Train | 5 | — | |
| 2019 Subaru Ascent | Power Train | 5 | — | |
| 2019 Mazda CX-3 | Power Train | 4 | — | |
| 2019 Mazda CX-5 | Power Train | 4 | — | |
| 2019 Mazda CX-9 | Power Train | 4 | — | |
| 2019 Mazda Mazda6 | Power Train | 4 | — | |
| 2020 Subaru Ascent | Power Train | 4 | — | |
| 2020 Subaru Legacy | Power Train | 3 | — | |
| 2020 Subaru Outback | Power Train | 3 | — | |
| 2021 Ford Escape | Steering | 2 | — | |
| 2021 Mazda CX-5 | Power Train | 2 | — |
Showing the 25 model years where P0842 appears most; it is on file for 33 in total.
A model year appears here because the code is named in its record, not because every one of these vehicles sets it. Counts are mentions in the federal files, not failure rates — nobody publishes the denominator.
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P0842 by make
The same record, one make at a time: the model years, bulletins and owner reports that name P0842 on that maker’s vehicles.
What it gets filed under
157 manufacturer filings name P0842. Start with what the maker wrote down.
A code names the test that failed, not the part. A bulletin that names it is often a diagnosis someone has already written down — quote its number at the service desk.
Manufacturer filings that name it
Source: NHTSA manufacturer communicationsService bulletins and campaigns whose filed summary names P0842.
- 05-002-23 Service bulletin2023-05-17 · Power Train — Automatic Transmission — Control Module (Tcm/Pcm/Tecm)
- Some vehicles may experience the check engine light and automatic transaxle warning light ON with one or more of these DTCs stored in the TCM memory (P0842, P0847, P0872, P0877, P0780, P1738).
- 16-128-20R Service bulletin2023-03-15 · Power Train
- This bulletin announces availability of a new transmission harness for use when diagnosis of DTC P0842 -TRANSMISSION FLUID PRESSURE SENSOR / SWITCH “A” CIRCUIT LOW determines the sensor itself is OK but the transmission wiring harness is NG.
- SSM 50245 Service bulletin2021-10-29 · Electrical System
- Some 2020-2021 Escape vehicles may exhibit various symptoms due to a loss of voltage reference (VREF) from the 14290 harness above the steering shaft u-joint. Possible symptoms may include an illuminated malfunction indicator lamp (MIL),runs rough, fuse 44 open and may or may not set DTCs P06A7, P0840, P0842, P0845, P0847, P2122, P2127, P0522, P008A, P06A6, P2196, P0192, P0369, P0212, P0340, P0344
- SSM 50116 Service bulletin2021-09-14 · Steering
- Some 2020-2021 Escape vehicles may exhibit a loss of voltage reference (VREF) or runs rough, blow fuse 44 and may or may not set DTC's P06A7,P0840,P0842,P0845,P0847,P2122,P2127,P0522,P008A,P06A6,P2196,P0192, P0212,P0340,P0344,P0365,P0532,P06E9,P0369,C175E,C175B,C2302,P0369. The 14290 harness directly above the steering shaft u-joint near the upper brake pedal mount may come in contact with the ste
- 05-001-21-3826 Service bulletin2021-09-03 · Power Train
- Some vehicles may experience the check engine light and automatic transaxle warning light ON with one or more of these DTCs stored in the TCM memory (P0842, P0847, P0872, P0877, P0780, P1738). P0842:00 - Oil pressure switch No. 1 (oil pressure switch B) stuck on, P0847:00 - Oil pressure switch No. 2 (oil pressure switch A) stuck on, P0872:00 - Oil pressure switch No. 3 (oil pressure switch A) stuc
- 16-128-20R Service bulletin2021-01-26 · Electrical System
- This bulletin announces availability of a new transmission harness for use when diagnosis of DTC P0842 -TRANSMISSION FLUID PRESSURE SENSOR / SWITCH “A” CIRCUIT LOW determines the sensor itself is OK but the transmission wiring harness is NG.
What P0842 means
Source: SAE J2012 / OBD-IIP0842 sits in the generic range of the OBD-II standard, so it means the same thing on every vehicle sold in the United States — but WhichTrim does not carry a definition for it and will not invent one. What is on this page is the record: who named it and on what.
A stored code names the test that failed, never the part that caused it. It is the starting point of a diagnosis, not its conclusion — the same code has several possible causes and the cheap one is not always right.
Common questions about P0842
Source: NHTSA files and the OBD-II standardCan I keep driving with P0842 stored?
Nobody can answer that from the code alone, and a site that does is guessing. A steady light means a fault was logged and the car should be checked soon; a flashing light means a severe misfire — slow down and get it seen as soon as possible, because severe misfire can quickly damage the catalytic converter. The safe read of this page is the mileage and the components, not permission.
Does a code mean the car is recalled?
No. Recalls are filed by campaign and matched by VIN, and none of them are triggered by a scan tool. If you want to know whether an open recall applies to one specific vehicle, check the VIN at nhtsa.gov/recalls — that is the only source that settles it.
Why do the counts here differ from other sites?
Because these are not estimates. Every number on this page is a count of documents in NHTSA's own files: manufacturer communications that name the code in their filed summary, and owner complaints that name it in the narrative. We do not model, weight or extrapolate them.
Will clearing the code fix it?
Clearing turns the light off and erases the freeze-frame data a technician would have used to work out what happened. If the condition is still there the code returns, usually within a few drive cycles, and the diagnosis now starts from less information than before.