Electronic Power Steering Control Module Voltage Low
What does C0153 mean?
The C0153 code means the vehicle's onboard diagnostic system has detected: Electronic Power Steering Control Module Voltage Low. This is a moderate severity code.
Common Symptoms
- EPS warning light on
- Intermittent power steering loss
- Steering heavier during engine start
- Multiple electrical system warnings
- Battery or charging system warning
Probable Causes (Ranked by Likelihood)
- Weak or failing vehicle battery Very High
- Faulty alternator not providing sufficient voltage High
- Corroded battery cables or terminals Moderate
- High resistance in EPS power supply circuit Low
Step-by-Step Diagnostic Procedure
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Test battery voltage and perform load test
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Check alternator output voltage
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Inspect battery terminals and cables for corrosion
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Measure voltage at EPS module connector
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Check for excessive parasitic battery drain
Frequently Asked Questions
Why does low voltage affect power steering?
Electric power steering motors require significant electrical current to operate. When system voltage drops, the EPS module may not have enough power to drive the motor, resulting in reduced or no assist.
Can a bad battery cause steering issues?
Yes. A weak battery can cause voltage drops when the EPS motor draws high current during parking maneuvers, leading to momentary steering assist loss.
Will fixing the battery resolve this code?
If the code was caused by low voltage from a weak battery or charging system, fixing the root cause should resolve the EPS code. Clear the code and monitor for recurrence.