P0D01Control Pilot Charging Ventilation Switch Range/Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- How the car detects it
- The ventilation switch lets the vehicle request charging state D, in which a small resistor pulls the pilot down to about 3 V and the station may only deliver power with ventilation. P0D01 means this switch does not produce a plausible pilot level. GM documents the check for the Chevrolet Volt (VICM/HPC2): in a self-test with the cord unplugged and the diagnostic and ventilation switches closed, the ratio of pilot voltage to battery voltage must lie between 0.05 and 0.10 in the 2011 table, or between 0.04 and 0.10 in the 2016 and 2019 tables. 30 failed samples out of 50 at 100 ms set it as Type A, MIL after one trip; the pilot circuit and charging switch tests must have finished first. Circuit faults are P0D00, P0D02 and P0D03. If the switch really sticks closed, stations without ventilation will not supply power.
- What you may notice
- Malfunction indicator lamp on (GM Type A)
- Charging possibly refused at stations without ventilation
- Likely causes
- PossibleInternal fault in the VICM/charging module switching or measuring circuit
- PossibleVentilation resistor branch out of tolerance or high contact resistance
- RareLeakage on the pilot line, for example moisture in the charge inlet
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €100 – €1,200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.