B0091 on Acura RDX
Factory diagnostic protocol and troubleshooting wire for fault code B0091 specifically for the Acura RDX (2020–2026, 2.0L VTEC Turbo (272HP / 280 lb-ft / SH-AWD)).
1. Symptoms of B0091 on Acura RDX
When the Engine Control Module (ECM/PCM) on your Acura RDX (2.0L VTEC Turbo (272HP / 280 lb-ft / SH-AWD)) logs fault code B0091, drivers commonly observe:
2. Most Likely Causes on Acura RDX
Historical warranty claims and technical repair bulletins for Acura RDX point to the following failure distribution:
3. Step-by-Step DIY Repair Guide for Acura RDX
Disconnect battery negative cable and wait 15 minutes to fully discharge SRS backup capacitors before touching airbag components. on the Acura RDX equipped with 2.0L VTEC Turbo (272HP / 280 lb-ft / SH-AWD).
Remove driver side door sill trim / lower B-pillar trim to access the yellow impact sensor. on the Acura RDX equipped with 2.0L VTEC Turbo (272HP / 280 lb-ft / SH-AWD).
Inspect sensor for water corrosion or cracked plastic housing. on the Acura RDX equipped with 2.0L VTEC Turbo (272HP / 280 lb-ft / SH-AWD).
Bolt new OEM side impact sensor into clean, rust-free ground location, torque bolt to spec, and click yellow locking connector firmly. on the Acura RDX equipped with 2.0L VTEC Turbo (272HP / 280 lb-ft / SH-AWD).
Reconnect battery, clear SRS trouble codes with an airbag-capable scanner, and verify light turns off after 5-second bulb check. on the Acura RDX equipped with 2.0L VTEC Turbo (272HP / 280 lb-ft / SH-AWD).
Equipment for Diagnosing Acura RDX (B0091)
Acura RDX OEM Replacement Sensor
Direct-fit replacement assembly engineered to OEM tolerances for Acura RDX.
AstroAI Auto-Ranging Digital Multimeter
Essential for testing 0.1V–5.0V sensor reference signals, ground continuity (<0.20Ω), and harness resistance.
BlueDriver Bluetooth Pro OBDII Scan Tool
Reads and clears enhanced codes (ABS, Airbag, Transmission, Engine) & live freeze-frame telemetry on phone.
Other Common Fault Codes on Acura RDX
Frequently diagnosed powertrain, emissions, and sensor trouble codes logged on the Acura RDX:
4. Acura RDX B0091 FAQs
What causes code B0091 to trigger on a Acura RDX?
On the Acura RDX (2.0L VTEC Turbo (272HP / 280 lb-ft / SH-AWD)), B0091 is most frequently caused by Corroded or damaged left side impact crash sensor (B-pillar or door sill) or Corroded wiring harness under driver seat / driver door sill.
Where is the OBD-II port located on my Acura RDX?
On the Acura RDX, the 16-pin DLC diagnostic connector is located Under driver lower dash trim near hood release. Plug in any standard OBD-II scanner with the ignition in the ON position to read freeze-frame parameters.
Can I safely drive my Acura RDX with code B0091?
Caution. Side curtain and seat airbag deployment may be disabled in a side-impact collision. Given that B0091 carries a Critical severity rating, we advise avoiding heavy towing or aggressive throttle inputs until sensor readings are verified.