P0843 on Acura
Transmission Fluid Pressure Sensor/Switch 'A' Circuit High
P0843 on Acura vehicles indicates transmission fluid pressure sensor/switch 'a' circuit high. Au7o has documented this code across 1 Acura model — most commonly on RDX. The transmission fluid pressure sensor/switch 'A' circuit voltage is above the expected range (too high / open or shorted to power). Typical repair costs on Acura range from $150 to $500, depending on the specific model and root cause.
Common Causes of P0843
- •Sensor circuit open or shorted to voltage
- •Faulty pressure sensor/switch A
- •Corroded/damaged connector
- •Internal TCM fault
P0843 on Acura by Model
Acura RDX(1 issue)
- 5-Speed Automatic 2nd/3rd Clutch Transmission Fluid Pressure Switch Failure (P0847/P0848/P0700)2007-2012
The 2007-2012 RDX's 5-speed automatic uses clutch pressure switches to confirm hydraulic apply of the 2nd and 3rd clutch packs. These switches are a recurring failure point on the first-generation car — the 3rd clutch switch most often. When one fails or its circuit shorts, the TCM sets P0847/P0848 and flags P0700 at the PCM, illuminating the check engine light and frequently the D light. The car may drop into a fail-safe gear pattern with harsh or limited shifting. This is an electrical/sensor failure, not internal clutch damage, and is regularly misquoted by shops as a transmission rebuild.
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View P0843 across all makes →Frequently Asked Questions
What does P0843 mean on Acura?▼
P0843 stands for "Transmission Fluid Pressure Sensor/Switch 'A' Circuit High." The transmission fluid pressure sensor/switch 'A' circuit voltage is above the expected range (too high / open or shorted to power). On Acura specifically, this code is documented across 1 model.
What causes P0843 on Acura vehicles?▼
Common causes on Acura: Sensor circuit open or shorted to voltage, Faulty pressure sensor/switch A, Corroded/damaged connector, Internal TCM fault. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0843 on a Acura?▼
Repair costs on Acura range from $150 to $500, depending on the specific model and root cause.
Which Acura models have P0843 documented?▼
Au7o has documented P0843 on 1 Acura model: RDX.