P0E76 code meaning
Coolant Bypass Valve A Control Circuit Low
Powertrain system Generic code P0Exx codes Check engine light
What P0E76 means
With P0E76 the voltage on the control line of coolant bypass valve A stays lower than the driver expects for its current state, which points to a short to ground somewhere in the harness or inside the actuator. What happens next depends on the driver layout: a low-side output may leave the valve energised all the time, a high-side output can no longer move it at all, and the driver may switch off to protect itself. No manufacturer documents P0E76 publicly. In Ford's 2019 hybrid summary the matching job falls to P2682, flagged once the driver has signalled a fault continuously for over 5 s; only after that does Ford run its stuck-valve check P26AB. CARB requires circuit monitoring of output devices like this one. P0E77 is the high case, P0E75 an open; P0E79 and P0E7A cover a valve that is mechanically stuck.
P0E76 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.5 to 2.5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0E76
- Check engine light
- Valve stays in one position, heating behaves oddly
- Possible blown fuse if the short is hard
Common causes of P0E76
- Most likelyChafed control wire touching body or engine ground
- PossibleInternal short in the valve A actuator
- Less likelyMoisture bridging pins in the valve connector
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Coolant bypass valve aWiring harness
What each part of P0E76 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 76 | The exact fault in that area. |
What to do next
- Note P0E76 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 P0E76
What does P0E76 mean?
P0E76 means "Coolant Bypass Valve A Control Circuit Low". With P0E76 the voltage on the control line of coolant bypass valve A stays lower than the driver expects for its current state, which points to a short to ground somewhere in the harness or inside the actuator. It is a generic code, so it means the same on every make.
Is it safe to drive with P0E76?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P0E76 fail an emissions test?
Yes, it can. P0E76 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 P0E76 to fix?
Difficulty: medium. A typical repair takes 0.5 to 2.5 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P0E76 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.