Powertrain, generic · Computer and auxiliary outputs

P062D Fuel Injector Driver Circuit Performance Bank 1

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

Direct-injection injectors (petrol and common-rail diesel) need a high boost voltage generated in the module to open fast; the module then holds them with pulsed battery voltage. P062D monitors this boost voltage or the shared injector supply of bank 1. GM's 2018 Duramax sets it when the internal boost voltage is above 75 V or below about 52 V, the supply line to the injectors is open or the module has an internal fault, in 14 of 20 samples at 6.25 ms, with the lamp in the first trip (2025: above 60 V or below 40 V). Ford's petrol direct injection flags it when the opening current is not reached in time (10 s, no cylinder named), Ford's diesel when the driver chip reports a loss of high voltage (0.5 s). Injectors then open late or not at all: misfires, rough running, loss of power or no start. GM uses only P062D, also on V8s. Single injector circuits are P0201 ff.

Likely causes

Short in an injector high-side wire or injector collapsing the boost voltage
Module internal (boost converter, driver chip)
System undervoltage or poor ground
Harness or injector connector (moisture, oil)

Symptoms

  • Check engine light (GM in the first trip)
  • Misfires, rough running, stumbling
  • Loss of power or limp mode
  • Hard start or no start

Repair estimate

DifficultyHardWorkshop job
Parts and labour€100–1,800
Time1–5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

engine control modulefuel injectorsinjector wiring

Related codes

P062EP2146P2147P0201P02EEP0300

References: law.cornell.edu, gsi.ext.gm.com, fordservicecontent.com, newtonnet.co.uk.