P0E7B code meaning
Coolant Bypass Valve B Control Circuit/Open
Powertrain system Generic code P0Exx codes Check engine light
What P0E7B means
P0E7B covers an interrupted control circuit of the second coolant bypass valve, B. The module sees no proper load on its output, so the valve cannot be positioned and stays wherever it last was or springs back to its rest position. Stellantis does use the valve B family: its 2025 and 2026 bulletins for the RAM 1500 and the Wagoneer with the 3.0 litre Hurricane engine list P0E7C to P0E7F together with U063C, a lost link to the valve B actuator, and its plug-in hybrids use P0E7F and P0E80. P0E7B itself appears in none of these published documents. Ford's 2019 hybrid summary shows the usual circuit test on a comparable valve, a driver fault lasting over 5 seconds. CARB requires circuit checks on such outputs. Short and plausibility faults are P0E7C to P0E7E.
P0E7B 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 P0E7B
- Check engine light
- Heating or engine warm-up behaves differently
Common causes of P0E7B
- Most likelyBroken wire or unplugged connector at valve B
- PossibleInternal open in the valve B actuator
- Less likelyMissing supply or ground at a networked valve actuator
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Coolant bypass valve bWiring harness
What each part of P0E7B means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 7B | The exact fault in that area. |
What to do next
- Note P0E7B 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 P0E7B
What does P0E7B mean?
P0E7B means "Coolant Bypass Valve B Control Circuit/Open". P0E7B covers an interrupted control circuit of the second coolant bypass valve, B. It is a generic code, so it means the same on every make.
Is it safe to drive with P0E7B?
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 P0E7B fail an emissions test?
Yes, it can. P0E7B 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 P0E7B 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 P0E7B clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.