P0D1BHybrid/EV Battery Pack Coolant Control Valve B Performance/Stuck Off
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- P0D1B is stored when coolant control valve B of the battery loop is electrically intact but fails to reach or hold the position the controller asks for, or stays in its off state. How a maker judges this varies: for valve A, GM's 2011 Chevrolet Volt learns the end stops, expects the target within 1.5 s and watches for drift above 3 %, while Audi and Toyota infer a wrong valve state from coolant temperatures. No such table or bulletin is published for valve B, so P0D1B appears in no public manufacturer document. CARB asks for a functional check of battery cooling performance wherever feasible. Debris, a seized valve body, a worn actuator or a calibration that judges too tightly are plausible. Cooling or heating of the pack then suffers. The opposite case is P0D1C.
- What you may notice
- MIL or battery thermal system warning
- Battery temperature rises during fast charging or hard driving
- Charging or drive power limited
- Likely causes
- PossibleValve B mechanically stiff or blocked by debris
- PossibleWorn valve actuator that no longer reaches its target
- RareDiagnostic limits in the module software set too tightly
- RareLow coolant or trapped air distorting the temperature-based check
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €0 – €700
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.