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P0356AcuraAcura RDX HubAll Acura P0356Critical Severity

P0356 on Acura RDX

Ignition Coil F Primary/Secondary Circuit Malfunction

Factory diagnostic protocol and troubleshooting wire for fault code P0356 specifically for the Acura RDX (2020–2026, 2.0L VTEC Turbo (272HP / 280 lb-ft / SH-AWD)).

Verified OEM Telemetry & Field Repair Tree
Acura RDX2020–2026
Acura RDX
SUV2.0L VTEC Turbo (272HP / 280 lb-ft / SH-AWD)
Reliability
Sensor Voltage Ref
0.1V – 5.0V Ref
RDX SAE Mode $01
ECU Network Bus
500 kbps CAN-FD
ISO 15765-4 Compliant
Drivability Status
Not Recommended
Critical urgency level
Est. Repair Cost
$100 - $350
Parts & Labor DIY
Check P0356 On Another Acura Model:
Diagnose P0356 on Specific RDX Model Year:

1. Symptoms of P0356 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 P0356, drivers commonly observe:

Flashing CEL on Acura RDX (2.0L VTEC Turbo (272HP / 280 lb-ft / SH-AWD))
Severe misfire on Acura RDX (2.0L VTEC Turbo (272HP / 280 lb-ft / SH-AWD))
P0306 code on Acura RDX (2.0L VTEC Turbo (272HP / 280 lb-ft / SH-AWD))
Acura RDX OBD-II Port Location
The 16-pin diagnostic connector is located Under driver lower dash trim near hood release. Plug in your scan tool to verify freeze-frame sensor values.

2. Most Likely Causes on Acura RDX

Historical warranty claims and technical repair bulletins for Acura RDX point to the following failure distribution:

55%
Dead Cylinder 6 ignition coil (Acura OEM Part)
25%
Wiring fault (Acura OEM Part)
12%
Corroded connector (Acura OEM Part)
* Source: Synthesized from NHTSA ODI field repair telemetry and verified OEM Technical Service Bulletin (TSB) repair tree frequency percentiles for Acura RDX.

3. Step-by-Step DIY Repair Guide for Acura RDX

01
Scan and Record Freeze Frame Telemetry

Connect an OBD-II scan tool and record freeze frame sensor telemetry for code P0356 to note engine RPM, load, and voltage when the fault triggered. on the Acura RDX equipped with 2.0L VTEC Turbo (272HP / 280 lb-ft / SH-AWD).

Required Tool: OBD-II Scanner
02
Inspect Related Wiring Harness & Connectors

Inspect the electrical connector and wiring harness related to P0356 for chafing, corrosion, moisture, or pin push-out. on the Acura RDX equipped with 2.0L VTEC Turbo (272HP / 280 lb-ft / SH-AWD).

Required Tool: Flashlight, Multimeter
03
Test Component Resistance & Voltage Supply

Measure circuit voltage supply (12V B+ or 5V reference) and sensor/actuator resistance according to factory repair manual specifications. on the Acura RDX equipped with 2.0L VTEC Turbo (272HP / 280 lb-ft / SH-AWD).

Required Tool: Digital Multimeter
04
Replace Defective Component

Install a new OEM-grade replacement part, torque fasteners to factory spec, and ensure electrical locking tabs click firmly. on the Acura RDX equipped with 2.0L VTEC Turbo (272HP / 280 lb-ft / SH-AWD).

Required Tool: Hand Tool Socket Set, Torque Wrench
05
Clear Trouble Codes & Complete Drive Cycle

Clear all stored DTCs from vehicle memory and perform an OBD-II drive cycle to confirm the diagnostic monitor resets to 'Ready'. on the Acura RDX equipped with 2.0L VTEC Turbo (272HP / 280 lb-ft / SH-AWD).

Required Tool: OBD-II Scanner
Recommended Parts & Testing Tools

Equipment for Diagnosing Acura RDX (P0356)

Prime Fast Delivery & Verified Fitment
OEM Ignition Component

Direct-Fit Laser Iridium Spark Plugs (Set of 4/6)

4.8 / 5.0 (Top Rated)

Pre-gapped iridium spark plugs engineered to restore smooth combustion on Acura RDX.

$36 – $68 Prime
Check Price on Amazon
Ignition Service Tool

Magnetic Swivel Spark Plug Socket Set

4.8 / 5.0 (Amazon Choice)

360-degree magnetic swivel socket prevents ceramic plug cracks inside deep engine spark wells.

$16.99 Prime
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Top Mobile OBD-II Scanner

BlueDriver Bluetooth Pro OBDII Scan Tool

4.7 / 5.0 (50,000+ Reviews)

Reads and clears enhanced codes (ABS, Airbag, Transmission, Engine) & live freeze-frame telemetry on phone.

Compare OEM & Aftermarket Replacement Sensors for Acura RDXVerified direct-fit pricing from Denso, Bosch, Motorcraft, and ACDelco on Amazon.
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Other Common Fault Codes on Acura RDX

Frequently diagnosed powertrain, emissions, and sensor trouble codes logged on the Acura RDX:

4. Acura RDX P0356 FAQs

What causes code P0356 to trigger on a Acura RDX?

On the Acura RDX (2.0L VTEC Turbo (272HP / 280 lb-ft / SH-AWD)), P0356 is most frequently caused by Dead Cylinder 6 ignition coil or Wiring fault.

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 P0356?

No. Cylinder 6 ignition coil dead. Given that P0356 carries a Critical severity rating, we advise avoiding heavy towing or aggressive throttle inputs until sensor readings are verified.