P0172 on Honda Ridgeline: Fix & DLC Location
Factory diagnostic troubleshooting wire for fault code P0172 (System Too Rich (Bank 1) - Symptoms, Causes & Step-by-Step Fix) specifically on the Honda Ridgeline (2020–2026, 3.5L V6 SOHC VTEC (280HP / 262 lb-ft / AWD)).
1. Symptoms of P0172 on Honda Ridgeline
When the Engine Control Module (ECM/PCM) on your Honda Ridgeline (3.5L V6 SOHC VTEC (280HP / 262 lb-ft / AWD)) logs fault code P0172, drivers commonly observe:
2. Most Likely Causes on Honda Ridgeline
Historical warranty claims and technical repair bulletins for Honda Ridgeline point to the following failure distribution:
3. Step-by-Step DIY Repair Guide for Honda Ridgeline
Use dedicated MAF cleaner to remove carbon buildup from sensor wires. on the Honda Ridgeline equipped with 3.5L V6 SOHC VTEC (280HP / 262 lb-ft / AWD).
Use live OBD-II scanner data; negative trims beyond -10% indicate the ECU is cutting fuel. on the Honda Ridgeline equipped with 3.5L V6 SOHC VTEC (280HP / 262 lb-ft / AWD).
Perform a fuel pressure leak-down test to identify injectors leaking raw gasoline into cylinders while parked. on the Honda Ridgeline equipped with 3.5L V6 SOHC VTEC (280HP / 262 lb-ft / AWD).
Other Common Fault Codes on Honda Ridgeline
Frequently diagnosed powertrain, emissions, and sensor trouble codes logged on the Honda Ridgeline:
4. Honda Ridgeline P0172 FAQs
What causes code P0172 to trigger on a Honda Ridgeline?
On the Honda Ridgeline (3.5L V6 SOHC VTEC (280HP / 262 lb-ft / AWD)), P0172 is most frequently caused by Faulty or leaking fuel injector or Contaminated Mass Air Flow (MAF) sensor.
Where is the OBD-II port located on my Honda Ridgeline?
On the Honda Ridgeline, the 16-pin DLC diagnostic connector is located Under driver dash above driver left knee area. Plug in any standard OBD-II scanner with the ignition in the ON position to read freeze-frame parameters.
Can I safely drive my Honda Ridgeline with code P0172?
Driveable short distances, but unburnt fuel can damage catalytic converters. Given that P0172 carries a Medium severity rating, we advise avoiding heavy towing or aggressive throttle inputs until sensor readings are verified.