P062BInternal Control Module Fuel Injector Control Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P062B monitors the injector driver stage inside the engine module. On direct injection engines a separate driver chip generates the boost voltage for opening the injectors and is configured by the main processor via SPI; GM checks initialisation, boost voltage (petrol: 90 V or more or 40 V or less), self-test, data download and communication, and sets the code in the first trip – while it is active, single injector circuit codes are suppressed. Saab's 2.0 L turbo also counts a short to ground in an injector circuit (10 s, two trips). Ford's diesel uses it as a plausibility check of the injection command (post injection, energising over 200 µs during overrun), Ford petrol engines only with cylinder deactivation. Chrysler's 3.0 L EcoDiesel was fixed by software. Misfires, loss of power or stalling follow.
- What you may notice
- Check engine light (GM in the first trip)
- Stumbling, misfires, loss of power
- Starting problems or stalling
- Other injector codes are not reported while P062B is active (GM)
- Likely causes
- PossibleShort to ground on an injector high-voltage or control wire, or a faulty injector
- PossibleEngine module software or calibration fault (update available)
- PossibleUndervoltage or supply problem (battery, main relay)
- PossibleFaulty driver chip in the engine module
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €100 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.