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P121C00 Cylinder balance - injector leaking Injector leak Cylinder compression low - Blow-by past the injector - Blow-by past the glow plug - Mechanical fault, valve, piston/ring, etc. Injector fault Check the injector and surrounding area for evidence of fuel leakage. Disconnect the injector and check for evidence of fuel leakage in the connector. Rectify as necessary. Clear the DTCs. Reconnect the injector and start the engine. Allow to warm up and allow to idle (cylinder balance diagnosis is now active). If the DTC resets, check for blow-by etc. and rectify as necessary. Clear the DTCs and recheck. Carry out a compression test only if the DTC resets. If the above tests are all within range, install a new injector. REFER to: Fuel Injector (303-04A Fuel Charging and Controls - 2.4L Duratorq-TDCi HPCR (103kW/140PS) - Puma, Removal and Installation). P129300 Injector high side open - bank 1 - cylinders 1 or 4 (injectors 1 or 3) Fuel injector circuit (high side): open circuit Fuel injector circuit (high side): short circuit to ground Fuel injector circuit (high side): short circuit to power Fuel injector fault Check the fuel injectors and circuits. Refer to the electrical guides. Install a new injector if necessary. REFER to: Fuel Injector (303-04A Fuel Charging and Controls - 2.4L Duratorq-TDCi HPCR (103kW/140PS) - Puma, Removal and Installation). Clear the DTCs and test for normal operation. P129400 Injector high side open - bank 2 - cylinders 2 or 3 (injectors 4 or 2) Fuel injector circuit (high side): open circuit Fuel injector circuit (high side): short circuit to ground Fuel injector circuit (high side): short circuit to power Fuel injector fault Check the fuel injectors and circuits. Refer to the electrical guides. Install a new injector if necessary. REFER to: Fuel Injector (303-04A Fuel Charging and Controls - 2.4L Duratorq-TDCi HPCR (103kW/140PS) - Puma, Removal and Installation). Clear the DTCs and test for normal operation. P167B00 Fuel injector learning not done Pilot correction learning procedure has not been completed Engine control module (ECM) fault Run pilot correction learning function in line with service procedures. Clear the DTCs and test for normal operation. Refer to the warranty and policy and procedures manual if the ECM is suspect. P167B41 Fuel injector learning not done - general checksum failure Pilot correction learning procedure corrupted Engine control module (ECM) fault P214716 Fuel injector group A supply voltage circuit low - injector boost voltage too low Engine control module (ECM) fault Clear the DTC. Start the engine and retest. Refer to the warranty policy and procedures manual if the ECM is suspect. P214817 Fuel injector group A supply voltage circuit high - injector boost voltage too high Engine control module (ECM) fault Clear the DTC. Start the engine and retest. Refer to the warranty policy and procedures manual if the ECM is suspect. |