Thread: Ice Ice baby Ice

DTC P1380 Misfire Detected - Rough Road Data Not Available
Circuit Description

The PCM receives rough road information from the EBCM / EBTCM on the ClassII serial data circuit. The PCM uses the rough road information to enhance the misfire diagnostic by distinguishing crankshaft speed variations caused by driving on rough road surfaces from variations caused by true misfires. The EBCM / EBTCM transmits rough road information based on inputs from the wheel speed sensors. If the EBCM / EBTCM detects a condition which will not allow it to properly identify rough road situations while a misfire condition is being detected by the PCM, DTC P1380 will be set.
Conditions for Running the DTC

•	Engine load is less than 87%.

•	Engine speed is less than 5000 RPM.

•	Vehicle speed is greater than 10 mph.

•	A misfire DTC is occurring and requesting the MIL to be illuminated.

Conditions for Setting the DTC

The PCM has detected a EBCM / EBTCM rough road sensing error.
Action Taken When the DTC Sets

•	The PCM will not illuminate the Malfunction Indicator Lamp (MIL).

•	The PCM will store conditions which were present when the DTC set as Fail Records data only. This information will not be stored as Freeze Frame data.

Conditions for Clearing the MIL/DTC

•	A history DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction.

•	DTC can be cleared by using the scan tool Clear Info function or by disconnecting the PCM battery feed.

Diagnostic Aids

DTC P1380 set indicates that the ABS / TCS system has detected a malfunction which will not allow the EBCM / EBTCM to transmit correct rough road data to the PCM. The ABS/TCS Functional Test in ABS/TCS Diagnosis should be used to diagnose this condition.
DTC P1380 - EBCM DTC Detected - Rough Road Data Unusable

Ok that kinda makes sense to explain the 1380 code. I am pretty sure my EBCM has been on its way out for a while now. So if I am reading this right it just says the other code was set because my EBCM is junk AND I have the P0300.... Still gotta figure out the P0300 though.

Found it... It seems I got hit hard enough to tweak my headers and cause the #4 plug wire to lay on the header.

Wow

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