P2B07 code meaning
Cylinder 8 Injection Pulse Performance
Powertrain system Generic code P2Bxx codes Check engine light
What P2B07 means
P2B07 closes the warm-running row at cylinder 8, and the engine-wide check counting missed pulses over all cylinders is P2B96. No manufacturer documents P2B07 publicly as a separate monitor; GM's 2025 V8 tables mention it only in the code lists of shared calibration tables, while their cylinder 8 warm faults run as P10B1/P10B2. If a scan tool still shows P2B07, the logic matches the GM principle: injector coil voltage is sampled, and a missing opening trace means the pulse was not delivered. On many V8 designs cylinder 8 sits at the rear of a bank, close to the bulkhead and hot exhaust parts, so look at harness heat damage as well as the injector itself. Cold start: P2B0F.
P2B07 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor0.5 to 5 hours
- Clears after repairAfter a drive cycle
Symptoms of P2B07
- Check engine light
- Misfire on cylinder 8 (P0308), especially at idle
Common causes of P2B07
- Most likelyCylinder 8 injector not opening properly
- PossibleHeat-damaged harness section at the rear of the engine
- Less likelyLoose or corroded injector 8 connector
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Fuel injector cylinder 8Injector wiringEngine control module
What each part of P2B07 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| B | Area: hybrid propulsion. |
| 07 | The exact fault in that area. |
What to do next
- Note P2B07 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 P2B07
What does P2B07 mean?
P2B07 means "Cylinder 8 Injection Pulse Performance". P2B07 closes the warm-running row at cylinder 8, and the engine-wide check counting missed pulses over all cylinders is P2B96. It is a generic code, so it means the same on every make.
Is it safe to drive with P2B07?
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 P2B07 fail an emissions test?
Yes, it can. P2B07 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 P2B07 to fix?
Difficulty: medium. A typical repair takes 0.5 to 5 hours of work. This is a job for a workshop.
Will P2B07 clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.