Uploaded June 2026 | Updated September 2026, 3 weeks ago

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This 2016 Honda CRV has a flashing overdrive light and a P0843 pressure sensor code. Factory data says it’s an electrical issue, yet tons of shops replace the entire transmission for this exact fault!

Today, we are throwing away the factory flowchart. When you master the core fundamentals, you don't need them. I'll show you how I approached this diagnosis doing only 3 quick checks, and the foundational knowledge that enabled me to move through this quickly. When you learn the fundamentals, the diagnostics become easy.

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⚠️ Disclaimer:
ScannerDanner LLC is not responsible for misuse, unauthorized changes, or incorrect application of any information provided. Always follow proper safety protocols when using tools, equipment, or procedures discussed in this video. Use this content at your own risk.

00:00 2016 Honda CR-V P0843 Code Overview
00:48 Driven Pulley Pressure Sensor Data
01:36 Why You Should Test Drive First
02:20 Three-Wire Pressure Sensor Fundamentals
04:45 Bias Voltage and Sensor Design Differences
05:48 Possible Causes of a Fixed 5V Signal
08:58 First Step: Backprobing the Sensor
11:13 Finding and Testing the Pressure Sensor
12:09 Unplugged Connector Voltage Checks
12:58 Test Light Signal Circuit Integrity Test
13:38 Why Use a Test Light Instead of a Jumper Wire
15:11 Sensor Condemned Without a Flowchart
15:58 New Sensor Voltage Checks
16:23 Why This Wasn’t a Hydraulic Problem
16:59 What Does This Pressure Sensor Actually Do?
18:02 Confirming the Repair in Scan Data
18:52 Test Drive Verification
19:46 Final Thoughts and Shop Update