Category: Citroen

P0165 Citroen O2 Sensor Circuit Slow Response Bank 2 Sensor 3 Possible causes – Faulty Heated Oxygen Sensor Bank 2 Sensor 3– Heated Oxygen Sensor Bank 2 Sensor 3 harness is open or shorted– Heated Oxygen Sensor Bank 2 Sensor 3 circuit poor electrical connection Tech description Replacing the O2 Sensor 3 usually takes care…

P0158 Citroen HO2S22 Circuit High Voltage Possible causes – Faulty Rear Heated Oxygen Sensor Bank 2– Rear Heated Oxygen Sensor Bank 2 harness is open or shorted– Rear Heated Oxygen Sensor Bank 2 circuit poor electrical connection– Inappropriate fuel pressure – Faulty fuel injectors– Intake air leaks– Exhaust gas leaks Tech description Replacing the Rear…

P0159 Citroen HO2S22 Slow Response Possible causes – Faulty Rear Heated Oxygen Sensor Bank 2– Rear Heated Oxygen Sensor Bank 2 harness is open or shorted– Rear Heated Oxygen Sensor Bank 2 circuit poor electrical connection– Inappropriate fuel pressure– Faulty fuel injectors– Intake air leaks may be faulty– Exhaust gas leaks Tech description Replacing the…

P0160 Citroen HO2S22 Sensor Circuit No Activity Detected Possible causes – Faulty Rear Heated Oxygen Sensor Bank 2– Rear Heated Oxygen Sensor Bank 2 harness is open or shorted– Rear Heated Oxygen Sensor Bank 2 circuit poor electrical connection– Inappropriate fuel pressure– Faulty fuel injectors– Intake air leaks may be faulty– Exhaust gas leaks Tech…

P0153 Citroen HO2S21 Sensor Circuit Slow Response Possible causes – Faulty Front Heated Oxygen Sensor Bank 2– Front Heated Oxygen Sensor Bank 2 harness is open or shorted– Front Heated Oxygen Sensor Bank 2 circuit poor electrical connection– Inappropriate fuel pressure– Faulty fuel injectors– Intake air leaks– Exhaust gas leaks Tech description Replacing the Front…

P0154 Citroen A/F Sensor 21 Heater System Malfunction Possible causes – Faulty Front Heated Oxygen Sensor Bank 2– Front Heated Oxygen Sensor Bank 2 harness is open or shorted– Front Heated Oxygen Sensor Bank 2 circuit poor electrical connection– Inappropriate fuel pressure– Faulty fuel injectors– Intake air leaks may be faulty– Exhaust gas leaks Tech…

P0155 Citroen A/F Sensor 21 Heater System Malfunction Possible causes – Faulty Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1– Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1 circuit fuse– Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1 harness is open shorted to ground– Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1 circuit poor electrical…

P0156 Citroen HO2S22 Sensor Range/Performance Condition Possible causes – Faulty Rear Heated Oxygen Sensor Bank 2– Rear Heated Oxygen Sensor Bank 2 harness is open or shorted– Rear Heated Oxygen Sensor Bank 2 circuit poor electrical connection– Inappropriate fuel pressure– Faulty fuel injectors– Intake air leaks may be faulty– Exhaust gas leaks Tech description Replacing…

P0157 Citroen O2 Sensor Circuit Low Voltage Bank 2 Sensor 2 Possible causes – Faulty Rear Heated Oxygen Sensor Bank 2– Rear Heated Oxygen Sensor Bank 2 harness is open or shorted– Rear Heated Oxygen Sensor Bank 2 circuit poor electrical connection– Inappropriate fuel pressure– Faulty fuel injectors– Intake air leaks may be faulty– Exhaust…

P0152 Citroen HO2S21 Sensor Circuit High Voltage Possible causes – Faulty Front Heated Oxygen Sensor Bank 2– Intake air leaks may be faulty– Exhaust gas leaks– Front Heated Oxygen Sensor Bank 2 harness is open or shorted– Front Heated Oxygen Sensor Bank 2 circuit poor electrical connection– Inappropriate fuel pressure– Faulty fuel injectors Tech description…

P0150 Citroen Air Fuel Ratio Circuit Bank 2 Sensor 1 Possible causes – Faulty Air fuel ratio (A/F) sensor bank 2 sensor 1– Air fuel ratio (A/F) sensor bank 2 sensor 1 harness is open or shorted– Air fuel ratio (A/F) sensor bank 2 sensor 1 circuit poor electrical connection– Inappropriate fuel pressure– Faulty fuel…

P0151 Citroen HO2S21 Sensor Circuit Low Voltage Possible causes – Faulty Front Heated Oxygen Sensor Bank 2– Front Heated Oxygen Sensor Bank 2 harness is open or shorted– Front Heated Oxygen Sensor Bank 2 circuit poor electrical connection– Inappropriate fuel pressure– Faulty fuel injectors– Intake air leaks may be faulty– Exhaust gas leaks Tech description…

P0144 Citroen O2 Sensor Circuit High Voltage Bank 1 Sensor 3 Possible causes – Faulty Heated Oxygen Sensor Bank 1 Sensor 3– Heated Oxygen Sensor Bank 1 Sensor 3 harness is open or shorted– Heated Oxygen Sensor Bank 1 Sensor 3 circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning…

P0145 Citroen Heated Oxygen Sensor 3 Circuit Slow Response Possible causes – Faulty Heated Oxygen Sensor Bank 1 Sensor 3– Heated Oxygen Sensor Bank 1 Sensor 3 harness is open or shorted– Heated Oxygen Sensor Bank 1 Sensor 3 circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)– High…

P0146 Citroen O2 Sensor Circuit No Activity Detected Bank 1 Sensor 3 Possible causes – Faulty Heated Oxygen Sensor Bank 1 Sensor 3– Heated Oxygen Sensor Bank 1 Sensor 3 harness is open or shorted– Heated Oxygen Sensor Bank 1 Sensor 3 circuit poor electrical connection Tech description Replacing the O2 Sensor 3 usually takes…

P0147 Citroen O2 Sensor Heater Circuit Malfunction Bank 1 Sensor 3 Possible causes – Faulty Heated Oxygen Sensor Bank 1 Sensor 3– Heated Oxygen Sensor Bank 1 Sensor 3 harness is open or shorted– Heated Oxygen Sensor Bank 1 Sensor 3 circuit poor electrical connection What about the obd code? During testing the oxygen sensor…

P0148 Citroen High Pressure Common Rail Checksum Possible causes – Fuel Leaks– Faulty Fuel Control Actuator– Faulty Fuel Pressure Sensor Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P0148 Citroen Description The Fuel Control Actuator (FCA) is an electronically controlled solenoid valve. The ECM controls the amount of fuel that enters the…

P0139 Citroen HO2S Circuit Slow Response Bank 1 Sensor 2 Possible causes – Faulty Rear Heated Oxygen Sensor Bank 1– Rear Heated Oxygen Sensor Bank 1 harness is open or shorted– Rear Heated Oxygen Sensor Bank 1 circuit poor electrical connection– Inappropriate fuel pressure– Faulty fuel injectors– Intake air leaks may be faulty– Exhaust gas…

P0140 Citroen HO2S12 Sensor Circuit No Activity Detected Possible causes – Faulty Rear Heated Oxygen Sensor Bank 1– Rear Heated Oxygen Sensor Bank 1 harness is open or shorted– Rear Heated Oxygen Sensor Bank 1 circuit poor electrical connection– Inappropriate fuel pressure– Faulty fuel injectors– Intake air leaks may be faulty– Exhaust gas leaks Tech…

P0141 Citroen O2 Sensor 1/2 Heater Performance Possible causes – Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2– Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 circuit fuse– Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 circuit open shorted to ground– Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 circuit poor electrical connection– Faulty…