Ballenger Motorsports AFR500v2 Manual Rev 1.4a - 15 -
Error Code
Description
SEn 1
Heater open (wire open or sensing element cracked)
or no sensor connected
SEn 2
Heater shorted (wiring problem, H+ wire connected
to GND)
SEn 3
Supply voltage out of range (28V)
SEn 4
Vs voltage > 1.7V (sensor too cold/not ready for
measurement or Vs+ electrode cracked or Vs+ wire
open)
SEn 6
Ip+ voltage out of range ( sensing element cracked
or IP+ wire open )
SEn 8
Sensor failure or internal component damage.
Usually caused by improper grounding.
BAT_
The supply voltage is too low (<11 VDC)
BAT
ˉˉ
The supply voltage is too high
Top causes for an error:
1.
Bad Sensor due to rich misfiring or backfiring (tuning far too
rich and/or raw fuel hitting the sensor possibly leading to a
cracked ceramic or contaminated ceramic element).
2.
Bad Sensor due to having the sensor in the exhaust stream
with no control and no heating which almost immediately foul
a sensor.
3.
Bad Sensor due to bad manufacturing or damage in transit or
improper installation (sensor is at the bottom of the pipe, etc).
4.
Bad Sensor due to mechanical damage (dropped or hit).
5.
Sensor not reading within range due to being too hot or cold
(ie right next to the port or far down the exhaust stream).
6.
Wiring in harness is loose; pull each wire individually on each
connector to validate fully seated terminals.
Ballenger Motorsports AFR500v2 Manual Rev 1.4a - 16 -
7.
Wiring is improperly populated (crossed), send customer
images and make sure to tell them to validate direction using
keyways.
8.
Bad ground connection to the controller or bad power
connection. The voltage should be a DC supply voltage
between 11 and 28 volts. If the voltage drops below 11 it will
reset itself (sometimes this happens during cranking). We have
seen bad wiring contribute to sensor problems often. Try
connecting your power and ground directly to a good battery
and see if your issue remains. Poor wiring & ground problems
comprise the overwhelming bulk of the unit & premature
sensor failures we see. Dynos must be properly grounded (see
section 6a).
9.
Damage from improper grounding of Dynos, loggers, ECUs or
tuning devices.
17. How to maximize sensor life
1.
Get a baseline tune before installing a sensor. You don’t need
the sensor in most cases to get your baseline timing and fuel
settings.
2.
NEVER leave a sensor in an exhaust unheated (disconnected).
3.
Don’t leave the sensor in continuously, only use for tuning and
specific monitoring periods.
4.
Limit your use of the sensor with leaded, race, or oil mixed
fuels. NTK sensors are significantly more durable than Bosch
sensors in such environments.
5.
Limit time in water cooled exhausts and avoid this where
possible.
6.
Handle the sensor with extreme care. The sensing element is a
delicate ceramic. Rough handling or drops may destroy the
sensor.
7.
Never exceed 1700F (930C) EGT at the sensor. In high EGT
environments, extended bungs such as SNSR-01064/SNSR-
01054 or Heat Sink Bung Extenders such as SNSR-01065 are
strongly recommended.
