Category: OBDii Powertrain Codes

P1411 SAI System Incorrect Downstream Flow Detected Symptoms – Engine Light ON (or Service Engine Soon Warning Light)

P1413 SAI System Monitor Circuit Low Input Symptoms – Engine Light ON (or Service Engine Soon Warning Light)

P1414 SAI System Monitor Circuit High Input Symptoms – Engine Light ON (or Service Engine Soon Warning Light)

P1415 Air Pump Electric Current Sensor Circuit Low Voltage Possible causes – Secondary Air Injection check valve bank 2– Secondary Air Injection (AIR) pump electrical circuit fault – Blocked Secondary Air Injection (AIR) system – Faulty Secondary Air Injection (AIR) pump What about the obd code? The P1415 code is set when no O2 sensor…

P1416 Port Air Circuit Malfunction/ (AIR) System Bank 2 Symptoms – Engine Light ON (or Service Engine Soon Warning Light)

P1417 Port Air Relief Circuit Malfunction Symptoms – Engine Light ON (or Service Engine Soon Warning Light)

P1418 Split Air #1 Circuit Malfunction Symptoms – Engine Light ON (or Service Engine Soon Warning Light)

P1409 EVR Control Circuit Malfunction Possible causes EGRVR circuit open. VPWR open to EGRVR solenoid. EGRVR circuit short to VPWR or GND. Damaged EGRVR solenoid. Damaged PCM. Tech description The EGR vacuum regulator solenoid resistance is between 26 and 40 ohms. Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1409 Description This…

P1410 EGR Valve Position Sensor Circuit Malfunction Possible causes – EGR Valve Position Sensor Tech description Usually replacing the EGR Valve Position Sensor takes care of the problem. The sensor is located on top of the EGR valve. Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1410 Description The EGR Valve Position…

P1405 EGR Temperature Incorrect Possible causes – Faulty Differential Pressure Feedback Electronic (DPFE) sensor (EGR pressure sensor)– Plugged or damaged EGR tube– Differential Pressure Feedback Electronic (DPFE) sensor harness is open or shorted– Differential Pressure Feedback Electronic (DPFE) sensor circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1405…

P1406 EGR Valve Pintle Position Circuit Possible causes – Faulty Exhaust Gas Recirculation (EGR) valve– Carbon blockage of the pintle Tech description The P1406 code means that the EGR valve is 10% of the expected position by the Powertrain Control Module (PCM), usually caused by carbon built up n the EGR valve. Start by cleaning…

P1407 EGR Air Intrusion In Exhaust Supply To EGR Valve

P1408 EGR Flow Out Of Self Test Range Possible causes For vacuum activated systems, see the possible causes for DTC P0401. For electric motor systems, see the possible causes for DTC P0400. Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1408 Description This test is performed during the KOER on-demand self-test only….

P1399 Wheel Speed Sensor 2, G-Sensor Circuit Intermittent Possible causes – Valve clearance out of range– Blocked EGR (exhaust gas recirculation) Passages Tech description Adjusting the valves will usually fix this problem. What about the obd code? The control module monitors the crankshaft speed and has detected a misfire condition Symptoms – Engine Light ON…

P1400 Manifold Differential Pressure sensor condition Possible causes – Differential Pressure Feedback Electronic Sensor harness is open or shorted– Differential Pressure Feedback Electronic Sensor circuit poor electrical connection– Faulty Differential Pressure Feedback Electronic Sensor Tech description There is a factory service bulletin for the following Lincoln models: 2001-2002 Lincoln Town CarLincoln Factory Service Bulletin OBDII…

P1401 EGR Temperature Sensor Possible causes – EGR Temperature Sensor harness is open or shorted– EGR Temperature Sensor circuit poor electrical connection– Faulty EGR Temperature Sensor– Malfunction of EGR function, EGRC-BPT valve or EGRC-solenoid valve– Blocked EGR passages What about the obd code? An excessively low voltage from the Exhaust Gas Recirculation (EGR) temperature sensor…

P1402 EGR Function Open Possible causes – The EGR volume control valve circuit harness is open or shorted– EGR volume control valve leaking or stuck open– Faulty EGR temperature sensor Tech description Start by cleaning the EGR valve, if the code persist it may be necessary to replaced the EGR Valve Symptoms – Engine Light…

P1403 Exhaust Gas Recirculation System Valve 1 Possible causes – Faulty Diagnostic Module Tank Leakage (DMTL)– Diagnostic Module Tank Leakage harness is open or shorted– Diagnostic Module Tank Leakage circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1403 Description The heated DMTL (Diagnostic Module Tank Leakage) is used…

P1404 Exhaust Gas Recirculation Closed Position Performance Possible causes – Faulty Exhaust Gas Recirculation (EGR) valve– Carbon blockage of the pintle Tech description On some models, there is a service bulletin for the P1404 code that suggest reprogramming the Powertrain Control Module (PCM) to repair the problem. What about the obd code? While monitoring the…

P1393 Wheel Speed Sensor 1 – G – Sensor Circuit High Voltage