Error Code on Paragon

[Jfuller]

Anyone have this code come up recently and have a quick fix? It’s in a 2020 Paragon with the z8 motor…:does not operate and differently, just annoying having to do a hard shut down every time it goes off. Will only go 6mph if I don’t. Thanks in advance!

[Scooter G]

Jfuller, not sure if this previous thread points you in a direction...
https://www.planetnautique.com/vb5/f...line-bank1-low

[mlange]

From the PCM Service Manual...

Heated Exhaust Gas Oxygen Sensor (Bank 1-Sensor 1/Bank 1-Before Catalyst)
• Check Condition - Engine Running
• Fault Condition - Bank 1 adaptive fuel multiplier lower than -30%
• Corrective Action(s) - Illuminate MIL and/or sound audible warning or illuminate secondary warning lamp,
disable adaptive learn fueling correction for key-cycle, and possibly disable closed-loop fueling correction
during active fault .
• Emissions related fault
The HEGO sensor is a switching-type sensor around stoichiometry that measures the oxygen content
present in the exhaust to determine if the fuel fl ow to the engine is correct. If there is a deviation between
the expected reading and the actual reading, fuel fl ow is precisely adjusted for each bank using the Closed
Loop multiplier and then “learned” with the Adaptive multiplier. The multipliers only update when the system
is in either “CL Active” or “CL + Adapt” control modes. The purpose of the Adaptive Learn fuel multiplier is
to adjust fuel fl ow due to variations in fuel composition, engine wear, engine-to-engine build variances, and
component degradation.
This fault sets if the Adaptive multiplier is lower than -30%, indicating that the engine is operating rich
(excess fuel) and requires less fuel than allowed by corrections. Often high negative fueling corrections are
a function of one or more of the following conditions: 1) high fuel supply pressure to the fuel injection system,
2) a non-responsive HEGO sensor, and/or 3) an injector that is stuck open. This fault should be confi gured
to disable adaptive learn for the remainder of the key-cycle to avoid improperly learning the adaptive learn
table and may be confi gured to disable closed loop.

Diagnostic Aids

NOTE: If any other DTCs are present, diagnose those first.
□ Oxygen Sensor Wire - Sensor may be mispositioned contacting the exhaust. Check for short to
ground between harness and sensor and on sensor harness
□ Injectors - System will be rich if an injector driver or driver circuit fails shorted-to-ground. The
system will also be rich if an injector fails in an open.
□ Fuel Pressure - System will be rich if fuel pressure is too high. Check fuel pressure in the fuel rail
during key-on, engine off and during normal operating conditions.
□ System Grounding - ECM and engine must be grounded to the battery with very little resistance
allowing for proper current fl ow. Faulty grounds can cause current supply issues resulting in many
undesired problems.
□ If all tests are OK, replace the HEGO sensor with a known good part and retest