OBD-II code · Powertrain (generic)
P063C Generator Voltage Sense Circuit A Low
Same as P063A with the sense voltage below the plausible range.
Is it safe to drive with P063C?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySense line shorted to ground
- Less likelyPack cell imbalance approaching service threshold
- Less likelyGround point with elevated resistance
Symptoms
- Check engine light on
- Possible limp mode or no-start
- Multiple follow-up faults across modules
- Reset/relearn may be needed after repair
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–1.8 h
- Emissions test
- Usually unaffected
- Parts involved
- Alternator Voltage Sense A
Related codes
- P2CC3Generator Voltage Sense Circuit B Low
- P0639Throttle Actuator Control Range or Performance Bank 2
- P063AGenerator Voltage Sense Circuit A
- P063BGenerator Voltage Sense Circuit A Range or Performance
- P063DGenerator Voltage Sense Circuit A High
- P063EAuto Configuration Throttle Input Not Present Bank 1
- P063FAuto Configuration Engine Coolant Temperature Input Not Present
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.