P0CED code meaning
Hybrid/EV Electronics Coolant Pump A Enable Circuit
Powertrain system Generic code P0Cxx codes Check engine light
What P0CED means
Some electronics coolant pumps receive two signals: a speed command and a separate enable wire that switches the pump on. P0CED concerns that enable wire. In GM's 2011 Volt (11OBDG01) any open or short on it sets the code after 16 of 20 samples at 250 ms with more than 9 V supply, Type B, two trips. Later GM controllers split the short cases into their own codes and keep P0CED for an open: the HPC2 tables 16OBDG02 and 19OBDG02 fail it when, with enable commanded on, the line rests between 1.14 V and 2.81 V, a level that points to a floating wire. The speed command line itself is P0CE9 to P0CEC. Without enable the pump stays off even though its command looks normal, so electronics temperatures climb and power may be reduced.
P0CED 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 P0CED
- Malfunction indicator lamp on
- Electronics coolant pump remains off
- Reduced power or charging rate when electronics get warm
Common causes of P0CED
- Most likelyBroken enable wire or terminal pushed out of the connector
- PossibleEnable wire shorted to ground or voltage (codes it on older GM controllers)
- Less likelyDefective enable input inside the pump
- Less likelyFaulty enable driver in the control module
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Hybrid electronics coolant pump aWiring harnessHybrid control module
What each part of P0CED 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. |
| ED | The exact fault in that area. |
What to do next
- Note P0CED 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 P0CED
What does P0CED mean?
P0CED means "Hybrid/EV Electronics Coolant Pump A Enable Circuit". Some electronics coolant pumps receive two signals: a speed command and a separate enable wire that switches the pump on. It is a generic code, so it means the same on every make.
Is it safe to drive with P0CED?
Drive gently and only to a workshop. With P0CED the car can go into limp mode (reduced power) to protect itself.
Will P0CED fail an emissions test?
Yes, it can. P0CED 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 P0CED to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will P0CED clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.