Transmission Failsafe Relay Fault
1999-2000 BMW 323i E46 2.5L I6
Description
The DME or EGS (Electronic Gearbox Control) detected a fault in the transmission failsafe relay circuit. This relay controls power to the transmission solenoids and its failure can leave the transmission in a default safe mode.
Symptoms
- Transmission stuck in one gear
- Transmission failsafe mode activated
- Check Engine Light
- Harsh or no shifting
- Transmission warning light
Common Causes
- Faulty transmission failsafe relay
- Relay connector corrosion
- Wiring fault to relay
- EGS module failure
- Blown relay fuse
Diagnostic Steps
- Test relay operation with multimeter
- Check relay fuse
- Inspect relay connector for corrosion
- Test power supply to relay
- Swap relay with known-good unit
Repair Notes
Replace the transmission failsafe relay and inspect associated wiring.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P1747 on Other Vehicles
Common Questions
What does code P1747 mean on a 1999-2000 BMW 323i E46?
P1747 stands for "Transmission Failsafe Relay Fault". The DME or EGS (Electronic Gearbox Control) detected a fault in the transmission failsafe relay circuit. This relay controls power to the transmission solenoids and its failure can leave the transmission in a default safe mode.
What are the symptoms of P1747 on a BMW 323i E46?
Common symptoms of P1747 include: Transmission stuck in one gear, Transmission failsafe mode activated, Check Engine Light, Harsh or no shifting, Transmission warning light.
What causes P1747 on a 1999-2000 BMW 323i E46?
Common causes of P1747 include: Faulty transmission failsafe relay, Relay connector corrosion, Wiring fault to relay, EGS module failure, Blown relay fuse.