P062B
Internal Control Module Fuel Injector Control Performance
Control module (ECM/PCM)
Generic OBD-II
High
What it means
P062B means the ECM's internal self-checks found that its fuel injector control circuitry isn't performing as expected. Because the ECM drives the injectors, this can cause rough running, misfires, hard starting, or a no-start. It's often traced to poor power or ground to the module or a wiring fault overloading the drivers, but it can also mean the ECM itself is failing.
High
Can I keep driving? Risky — the ECM's internal injector control is faulting; the engine may run rough, misfire, lose power, or fail to start. Have it diagnosed before driving far.
Common symptoms
What you'll notice
- Check-engine light on
- Rough running or misfire
- Hard starting or no-start
- Reduced power or hesitation
Common causes
Most likely first
- Poor ECM power or ground (weak battery, corroded terminals, bad grounds)Likely
- Short or open in the fuel injector wiring loading the ECM's driversCommon
- Internal ECM injector-driver failureCommon
- Corrupted or outdated ECM softwareLess often
How to diagnose & fix
Work through it in order
- Test the battery and check the ECM power and ground circuits.
- Inspect the injector wiring and connectors for shorts that could overload the drivers.
- Scan for injector-circuit codes (e.g. P0200-series) that point to a specific cylinder.
- Reflash the ECM if an update is available; replace it if an internal fault is confirmed.
- Clear the code and re-test to confirm the repair.
FAQ
Quick answers
Is it safe to drive with P062B?+
Not recommended. An internal injector-control fault can cause misfires or a no-start, which can also damage the catalytic converter, so get it diagnosed first.
Can I just clear P062B?+
It will return if the ECM has a real wiring, power, or internal fault. Fix the cause before clearing.
Related codes
Often seen with P062B
Read & clear P062B yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX