In order to shift gears at the appropriate time, the engine control unit needs to be able to communicate with the transmission control module at all times. This is done via the transmission control system circuit through a series of voltage signals. If there is an issue along this circuit, a P0898 DTC will be saved.
What Transmission Do I Have?
How Serious is the Code?
If the ECU can’t talk to the transmission to find out what is going on, a number of drivability issues can occur. Like slipping, complete failure to change gears and engine stalling. So a P0898 diagnostic trouble code is quite serious indeed.
Symptoms
Symptoms of a P0898 include:
- Slipping
- Unusually harsh gear changes
- Failure to change gears
- Transmission overheating
- Engine stalling
Causes
- Damaged wiring or connectors
- TCM failure
- ECU programming issues
- ECU failure
How to Diagnose the Code?
Since the P0898 OBDII is usually caused by electrical or software related issues, the manufacturer’s TSB database should be checked first for known solutions and ECU software updates. The wiring and connectors along the circuit should also be checked for signs of damage wires and corroded connectors. The CAN BUS system should also be checked.
What Transmission Do I Have?
What Repairs Will Fix P0898?
- Repair or replace damaged wiring/connectors
- Replace transmission control module
- Reprogram or replace ECU
Related Codes
N/A
