P0C24 code meaning
Electric/Auxiliary Transmission Fluid Pump Control Module Circuit Low
Powertrain system Generic code P0Cxx codes Check engine light
What P0C24 means
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.
P0C24 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0C24
- No engine auto-stop
- MIL or transmission warning
Common causes of P0C24
- Most likelyCommand wire shorted to ground, e.g. chafed at the transmission case
- PossibleFluid or corrosion in the pump connector pulling the line low
- Less likelyOutput stage in the PCM/TCM or input of the pump module faulty
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Aux trans pump control moduleWiring harnessTCM
What each part of P0C24 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| C | Area: hybrid propulsion. |
| 24 | The exact fault in that area. |
What to do next
- Note P0C24 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P0C24
What does P0C24 mean?
P0C24 means "Electric/Auxiliary Transmission Fluid Pump Control Module Circuit Low". 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. It is a generic code, so it means the same on every make.
Is it safe to drive with P0C24?
Drive gently and only to a workshop. With P0C24 the car can go into limp mode (reduced power) to protect itself.
Will P0C24 fail an emissions test?
Yes, it can. P0C24 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P0C24 to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will P0C24 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.