P1573

[Joe]

I have a weird issue. I put a new CV shaft in a week ago, then a day or two later I get a SES light. The only code is P1573, and the only thing I can find on this forum also involves the ABS/TCS lights being on, mine are both off and ABS/TCS work fine. I doubt the CV shaft had anything to do with it but it does seem to be weather related, around the time it started is when we had temps in the 80's. I notice that sometimes during colder weather, usually at night, the SES light will go off.

Car also kind of starts rough too, seems to drive OK after that. Any ideas? EBTCM going bad?

Thanks,
Joe

[FordMan77]

Pulled from another post. Maybe it'll help??

I know you got your answer but this is from alldata and is some interesting info -

The PCM uses the UART serial data line (CKT 800) to communicate with various other components and systems within the vehicle. If the PCM does not receive data from the Electronic Brake and Traction Control Module / Electronic Brake Control Module (EBTCM / EBCM) , the PCM will store DTC P1573 indicating loss of communication with the ABS/TCS system.

The PCM also receives rough road information from the EBTCM / EBCM on the Class 2 serial data circuit. The PCM uses the rough road information to enhance the misfire diagnostic by detecting crankshaft speed variations caused by driving on rough road surfaces. This allows false misfire information to be rejected. The EBTCM/ EBCM calculates rough road information by monitoring the ABS wheel speed sensors. If a malfunction occurs occurs which does not allow the EBTCM / EBCM to transmit correct rough road information to the PCM while a misfire DTC is requesting the MIL, DTC P1380 will set. If a loss of communications occurs which causes the PCM to not receive rough road information while a misfire DTC is requesting the MIL, DTC P1381 will set.

Under certain conditions, the PCM has the ability to request the EBTCM to shut OFF traction control via the serial data (CKT 800). The following DTCs will cause traction control to be disabled, an ABS/TCS DTC to be set, and the Traction OFF lamp to be illuminated:

• DTC P0101 - Mass Air Flow System Performance
• DTC P0102 - Mass Air Flow Sensor Circuit Low Frequency
• DTC P0103 - Mass Air Flow Sensor Circuit High Frequency
• DTC P0171 - Fuel Trim System Lean
• DTC P0172 - Fuel Trim System Rich
• DTC P0300 - Engine Misfire Detected
• DTC P0336 - 18x Reference Signal Circuit
• DTC P0341 - Camshaft Position Sensor Performance
• DTC P1200 - Injector Control Circuit
• DTC P1374 - 3X Reference Circuit

[Joe]

Thanks for the info.

Don't know if I truly fixed it but the SES light hasn't came back on yet, also hasn't been too hot/humid out either. But it seems the prong or whatever you call it on the connector at the EBCM(EBTCM?) was bent in too much, so I pried it out.