P0C24Electric/Auxiliary Transmission Fluid Pump Control Module Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P0C24 means the circuit from the controlling module to the auxiliary pump control module is held low, typically a short to ground on the command line. No manufacturer documents this exact code publicly. How the line is used is visible in Ford's 2016 F-150 2.7L bulletin, where the PCM commands the start-stop pump by duty cycle and the technician checks the pump by sweeping that command from 20 to 90 percent. A grounded line leaves the pump without a valid command or, depending on logic, permanently off. GM's ELR pump controller likewise depends on its wake-up signal to run. CARB requires output circuits of such components to be monitored. P0C23 is the open circuit, P0C25 the high side, P2796 to P2798 the classic pump control circuit codes.
- What you may notice
- No engine auto-stop
- MIL or transmission warning
- Likely causes
- LikelyCommand wire shorted to ground, e.g. chafed at the transmission case
- PossibleFluid or corrosion in the pump connector pulling the line low
- RareOutput stage in the PCM/TCM or input of the pump module faulty
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €50 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.