P2B06 is the warm-engine pulse check for cylinder 7 and so practically limited to V8 and larger engines. No manufacturer documents P2B06 publicly in its own entry. In GM's 2025 V8 tables the code appears only in the lists of a shared calibration: a pulse counts as missing when the measured opening magnitude stays below a fixed value of 75 across rail pressures from 0.4 to 24 MPa. The warm per-cylinder faults GM actually reports on that V8 are its offset-learning limits P10AF/P10B0 for cylinder 7. CARB treats the injector as an output part whose response to a command must be verified. Typical follow-up is a misfire count on cylinder 7; the cold-start sibling is P2B0E.
Medium severity. Can I keep driving?If the car is running normally, drive in moderation to a repair shop. If it loses power or another warning appears, do not continue.
Cylinder 7 is numbered according to the manufacturer: check your engine's manual before working on it.
Symptoms
- Engine light on after two trips
- Misfire on cylinder 7 (P0307), rough idle
Most likely causes
- Cylinder 7 injector with weak or missing armature lift
- Wiring to injector 7 damaged by heat or chafing
- Rail pressure outside the plausible range, distorting the opening signal
What to check, in order
Start with the simplest. You can tick off each step.
Good to know
- Repair difficulty: medium
- It affects emissions.
What each character of P2B06 means
- P: Powertrain: engine and transmission
- 2: Generic code: same on every make
- B: Subsystem depends on the code range
- 06: Specific fault in that system
Frequently asked questions
Can I keep driving with code P2B06?
If the car is running normally, drive in moderation to a repair shop. If it loses power or another warning appears, do not continue.
What causes code P2B06?
The most common causes are: cylinder 7 injector with weak or missing armature lift; wiring to injector 7 damaged by heat or chafing; rail pressure outside the plausible range, distorting the opening signal.
Related codes
- P2B0ECold Start Cylinder 7 Injection Pulse Performance
- P2B05Cylinder 6 Injection Pulse Performance
- P2B07Cylinder 8 Injection Pulse Performance
- P2B96Injection Pulse Performance
- P02F4Cylinder 7 Injector Circuit Range/Performance
- P0207Cylinder 7 Injector A Circuit/Open
- P0307Cylinder 7 Misfire Detected
Sources
Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.