OBD-II code · Chassis
C0740 Electric Power Steering Voltage Supply
The supply voltage to the EPS module is out of range, reducing or disabling power assist.
Is it safe to drive with C0740?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyBattery undervoltage during high steering load
- PossibleGround point corroded
Symptoms
- ABS warning light on
- ESC/stability control deactivated
- Possible reduced brake assist
- Speedometer may behave erratically
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–2 h
- Emissions test
- Usually unaffected
- Parts involved
- Eps Control Module, Power Supply Wiring, Battery
Related codes
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.