OBD-II code · Powertrain (generic)
P041F Secondary Air Injection System Switching Valve A Circuit Low
AIR switching valve A drive line stuck low — short to ground. 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 P041F?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyShort to ground
- Less likelyConnector pins corroded - high contact resistance
- Less likelyHarness chafing through insulation
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–2.5 h
- Emissions test
- Likely to fail
- Parts involved
- Secondary Air Injection Valve
Related codes
- P0412Secondary Air Injection System Switching Valve A Circuit
- P041CEGR Temperature Sensor B Circuit Low
- P041DEGR Temperature Sensor B Circuit High
- P041EEGR Temperature Sensor B Circuit Intermittent/Erratic
- P0420Catalyst System Efficiency Below Threshold (Bank 1)
- P0421Warm Up Catalyst Efficiency Below Threshold (Bank 1)
- P0422Main Catalyst Efficiency Below Threshold (Bank 1)
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.