Fuel and air metering: injectors
Injectors and their circuits: stuck, clogged or not answering the command. They often sit alongside a misfire in the very same cylinder.
25 codes in this section, 25 with a guide
What it usually turns out to be
- The cheapest test is to move the injector to a neighbouring cylinder: if the code follows, it is the injector.
- An «injector circuit» code is electrics: connector and wire, not clogging.
- An injector code and a misfire on the same cylinder are one fault, not two.
P0201Injector circuit malfunction — cylinder 1guideP0202Injector circuit malfunction — cylinder 2guideP0203Injector circuit malfunction — cylinder 3guideP0204Injector circuit malfunction — cylinder 4guideP0217Engine overheatingguideP0221Throttle position sensor B circuit range/performanceguideP0230Fuel pump primary circuit — malfunctionguideP0231Fuel pump secondary circuit — low signalguideP0234Turbocharger boost pressure too highguideP0235Turbocharger boost sensor — malfunctionguideP0236Turbocharger boost sensor — reading out of rangeguideP0238Turbocharger boost sensor — high signalguideP0243Turbocharger wastegate solenoid — circuit malfunctionguideP0245Turbocharger wastegate solenoid — low signalguideP0246Turbocharger wastegate solenoid — high signalguideP0251Injection pump metering unit — malfunctionguideP0261Injector 1 — circuit shorted to groundguideP0262Injector 1 — circuit shorted to powerguideP0263Cylinder 1 — contribution or balance faultguideP0299Turbocharger boost pressure too lowguideP2200NOx sensor (bank 1) — circuit malfunctionguideP2201NOx sensor (bank 1) — reading out of rangeguideP2263Turbocharger boost system performanceguideP2270O2 sensor signal stuck lean (bank 1, sensor 2)guideP2271O2 sensor signal stuck rich (bank 1, sensor 2)guide
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Other sections
Fuel and air metering, general 33Intake measuring sensors 17Oxygen sensors 19Throttle and accelerator pedal 15Mixture: lean and rich 11Ignition system and misfires 29Exhaust gas recirculation (EGR) 7Secondary air injection 3Catalytic converter 4Canister and purge valves 9Fuel vapour leaks 7Fuel level in the tank 4Diesel particulate filter 6Idle and auxiliary systems 22Control module and its circuits 21Transmission 17Communication between modules 20Brakes, ABS and stability control 17Body, airbags and lighting 12