OBD-II code · Powertrain (generic)
P0658 Actuator Supply Voltage A Circuit Low
Same as P0657 with the supply voltage below the plausible range. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
Is it safe to drive with P0658?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySupply voltage low
- Less likelyConnector pins corroded - high contact resistance
- Less likelyHarness chafing through insulation
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
- 0.5–2 h
- Emissions test
- Likely to fail
- Parts involved
- Actuator Supply Voltage A
Related codes
- P2670Actuator Supply Voltage B Circuit Low
- P2685Actuator Supply Voltage C Circuit Low
- P26E8Actuator Supply Voltage D Circuit Low
- P0655Engine Hot Lamp Output Control Circuit
- P0656Fuel Level Output Circuit
- P0657Actuator Supply Voltage A Circuit Open
- P0659Actuator Supply Voltage A Circuit High
- P065AGenerator System Performance
- P065BGenerator A Control Circuit Range or Performance
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.