Most WBO errors is related to some kind of wiring issue.
1.Wiring issue, see Lambda sensor wiring or CAN Lambda Module wiring.
2.MTune configuration error.
3.Bad WBO sensor, replace and test with a new one.
4.ECU WBO driver is faulty, contact your dealer.
Most common issues and how to fix them
1. LSU wiring - Check!
MaxxECU GEN1 lambda wirings
PIN |
Function (LSU 4.2) |
1 |
VS |
2 |
RCAL |
3 |
+12V (H+) |
4 |
H- |
5 |
VREF |
6 |
IP |
Note: All MaxxECUs after revision 9 has support for the LSU 4.9 WBO sensor.
PIN |
Function (LSU 4.9) |
1 |
IP |
2 |
VREF |
3 |
H- |
4 |
+12V (H+) |
5 |
RCAL |
6 |
VS |
MaxxECU GEN2 lambda wirings
PIN |
Function (LSU 5.2) |
1 |
IP |
2 |
VREF |
3 |
H- |
4 |
+12V (H+) |
5 |
RCAL |
6 |
VS |
Note: ONLY GEN2 MaxxECUs have support for the LSU 5.2 lambda sensor.
2. Lambda heater output properly configured?
Make sure Internal lambda sensor heater is activated as output function, wired to the sensor you are using.
Please contact support if problem persist.
