WABCO Fault Codes
We’ve compiled a list of the most commonly found WABCO fault codes. Please feel free to share with anyone else you know who frequently services WABCO brakes.
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WABCO Fault Codes
Below is an in-depth list of some of the most commonly encountered WABCO Fault Codes. With this information you or your techs can quickly assess the problem and begin working on a solution. Looking for diagnostic software? We also supply Wabco Toolbox Plus
PID/SID | FMI | ABS136 | Description |
0 | 1 | LF wheel sensor | air gap exceeding normal limits, wheel bearing |
1 | 2 | LF tone ring | missing or incorrect number of teeth |
1 | 3 | LF wheel sensor | dc voltage detected, voltage shorted to battery |
1 | 4 | LF wheel sensor | circuit shorted to ground |
1 | 5 | LF wheel sensor | circuit open |
1 | 6 | LF wheel sensor | sensor wires shorted together |
1 | 7 | LF tone ring | missing or incorrect number of teeth |
1 | 8 | LF slip | 16 sec slip detected, check air gap and modulators |
1` | 9 | LF harness | mismatch of harness or sensor pars |
1 | 10 | LF wheel sensor | loss of wheel sensor signal |
1 | 11 | LF abnormal speed | check tone ring, air gap and sensor wiring |
1 | 12 | LF frequency too high | incorrect frequency to ecm from sensor |
2 | 1 | RF wheel sensor | air gap exceeding normal limits, wheel bearing |
2 | 2 | RF tone ring | missing or incorrect number of teeth |
2 | 3 | RF wheel sensor | dc voltage detected, voltage shorted to battery |
2 | 4 | RF wheel sensor | circuit shorted to ground |
2 | 5 | RF wheel sensor | circuit open |
2 | 6 | RF wheel sensor | sensor wires shorted together |
2 | 7 | RF tone ring | missing or incorrect number of teeth |
2 | 8 | RF slip | 16 sec slip detected, check air gap and modulators |
2 | 9 | RF harness | mismatch of harness or sensor pars |
2 | 10 | RF wheel sensor | loss of wheel sensor signal |
2 | 11 | RF abnormal speed | check tone ring, air gap and sensor wiring |
2 | 12 | RF frequency too high | incorrect frequency to ecm from sensor |
3 | 1 | LR wheel sensor | air gap exceeding normal limits, wheel bearing |
3 | 2 | LR tone ring | missing or incorrect number of teeth |
3 | 3 | LR wheel sensor | dc voltage detected, voltage shorted to battery |
3 | 4 | LR wheel sensor | circuit shorted to ground |
3 | 5 | LR wheel sensor | circuit open |
3 | 6 | LR wheel sensor | sensor wires shorted together |
3 | 7 | LR tone ring | missing or incorrect number of teeth |
3 | 8 | LR slip | 16 sec slip detected, check air gap and modulators |
3 | 9 | LR harness | mismatch of harness or sensor pars |
3 | 10 | LR wheel sensor | loss of wheel sensor signal |
3 | 11 | LR abnormal speed | check tone ring, air gap and sensor wiring |
3 | 12 | LR frequency too high | incorrect frequency to ecm from sensor |
4 | 1 | RR wheel sensor | air gap exceeding normal limits, wheel bearing |
4 | 2 | RR tone ring | missing or incorrect number of teeth |
4 | 3 | RR wheel sensor | dc voltage detected, voltage shorted to battery |
4 | 4 | RR wheel sensor | circuit shorted to ground |
4 | 5 | RR wheel sensor | circuit open |
4 | 6 | RR wheel sensor | sensor wires shorted together |
4 | 7 | RR tone ring | missing or incorrect number of teeth |
4 | 8 | RR slip | 16 sec slip detected, check air gap and modulators |
4 | 9 | RR harness | mismatch of harness or sensor pars |
4 | 10 | RR wheel sensor | loss of wheel sensor signal |
4 | 11 | RR abnormal speed | check tone ring, air gap and sensor wiring |
4 | 12 | RR frequency too high | incorrect frequency to ecm from sensor |
7 | 3 | LF modulator valve | inlet and outlet shorted or crcuit shorted to another modulator |
7 | 5 | LF modulator valve | inlet or outlet circuit is open |
7 | 6 | LF modulator valve | inlet or outlet circuit is shorted to ground |
8 | 3 | RF modulator valve | inlet and outlet shorted or crcuit shorted to another modulator |
8 | 5 | RF modulator valve | inlet or outlet circuit is open |
8 | 6 | RF modulator valve | inlet or outlet circuit is shorted to ground |
9 | 3 | LR modulator valve | inlet and outlet shorted or crcuit shorted to another modulator |
9 | 5 | LR modulator valve | inlet or outlet circuit is open |
9 | 6 | LR modulator valve | inlet or outlet circuit is shorted to ground |
10 | 3 | RR modulator valve | inlet and outlet shorted or crcuit shorted to another modulator |
10 | 5 | RR modulator valve | inlet or outlet circuit is open |
10 | 6 | RR modulator valve | inlet or outlet circuit is shorted to ground |
13 | 3 | DBR retarder | output is shorted to battery supply |
13 | 5 | DBR retarder | output is open |
13 | 6 | DBR retarder | output is shorted to ground |
14 | 4 | ECU | low or loss of supply voltage to ECU |
14 | 5 | ECU | Loss of ground to ECU |
14 | 7 | ECU | ECU internal failure |
231 | 2 | ECU | J1939 data invalid |
231 | 5 | ECU | J1939 circuit open |
231 | 6 | ECU | J1939 circuit open |
231 | 7 | ECU | incorrect message from driveline retarder |
231 | 8 | ECU | incorrect message from engine retarder |
231 | 9 | ECU | incorrect torque message from engine |
231 | 10 | ECU | incorrect message from exhaust retarder |
231 | 12 | ECU | internal J1939 failure |
251 | 3 | ECU | supply voltage to ecm too high |
253 | 2 | ecu | parameters are incorrect; internal ecu failure |
253 | 12 | ECU | parameters are incorrect; internal ecu failure |
254 | 5 | ECU | loss of modulator/sensor harness connections |
254 | 8 | sensors | slipping, check air gap, one axle faster than other |
254 | 12 | ECU | internal ecu failure |
254 | 13 | ECU | internal ecu failure |
254 | 14 | ECU | internal ecu failure |
WABCO Fault Codes
WABCO Fault Codes
WABCO Fault Codes
WABCO Fault Codes