OBD-II code · Powertrain (generic, extended)
P2DD4 Control Pilot Charging Switch B Stuck On
The control pilot charging switch B reports a stuck on condition. SAE J1772 charging signal handshake may be compromised.
Is it safe to drive with P2DD4?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyContacts welded closed
- PossibleDriver stuck on
- Less likelyCarbon or debris buildup preventing free movement
Symptoms
- Charge status indicator shows fault
- Charging may not start or interrupts
- Slower-than-expected charge rate
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.5–3 h
- Emissions test
- Usually unaffected
- Parts involved
- Control Pilot Switch B, Wiring Harness, Bms
Related codes
- P0CFEControl Pilot Charging Switch A Stuck On
- P2DD1Control Pilot Charging Switch B Circuit High
- P2DD2Control Pilot Charging Switch B Intermittent/Erratic
- P2DD3Control Pilot Charging Switch B Stuck Off
- P2DD5Fuel Injection Quantity B Lower Than Expected
- P2DD6Fuel Injection Quantity B Higher Than Expected
- P2DD7Cold Start Fuel Injection Quantity B Lower Than Expected
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.