Category: OBDii Powertrain Codes

P1257 Supercharger System Overboost

P1258 Engine Coolant Overtemperature – Protection Mode Active

P1259 VTEC System Malfunction Possible causes – Low engine oil pressure or level– Open or short circuit condition– Faulty VTEC oil pressure switch– Faulty VTEC solenoid What about the obd code? The P1259 is set when there is a problem in the VTEC Oil Pressure Switch circuit or VTEC Solenoid Valve circuit Symptoms – Engine…

P1248 Turbo Boost Pressure Not Detected

P1249 Wastegate Control Valve Performance Symptoms – Engine Light ON (or Service Engine Soon Warning Light)

P1250 Early Fuel Evaporation Heater Circuit Symptoms – Engine Light ON (or Service Engine Soon Warning Light)

P1251 Air Mixture Solenoid Circuit Malfunction Symptoms – Engine Light ON (or Service Engine Soon Warning Light)

P1252 Pedal Correlation PDS1 and LPDS High Symptoms – Engine Light ON (or Service Engine Soon Warning Light)

P1253 Pedal Correlation PDS1 and LPDS Low Symptoms – Engine Light ON (or Service Engine Soon Warning Light)

P1247 Turbo Boost Pressure Low

P1240 Injector Circuit Cyllinder 7 Intermittent

P1241 Sensor Power Supply Low Input

P1242 Sensor Power Supply High Input

P1243 Injector Circuit Cylinder 8 Intermittent

P1244 Alternator Load Input Failed High Possible causes GEN-MON circuit short to B+. GEN-COM circuit short to B+. B+ open prior to start-up. Open GEN-COM prior to start-up. Open I-line prior to start-up. Damaged PCM. Tech description Verify the battery voltage is 14.5 volts. Verify the generator/regulator has the correct part number. Symptoms – Engine…

P1245 Alternator Load Input Failed Low Possible causes GEN-COM circuit short to GND. GEN-MON circuit short to GND. Open B+ wire during operation. Low system voltage. Broken generator belt. Damaged generator/regulator assembly. Damaged PCM. Tech description Verify the battery voltage is 14.5 volts. Verify the generator/regulator has the correct part number. Symptoms – Engine Light…

P1246 Alternator Load Input Failed

P1233 Fuel Pump Driver Module Off Line Possible causes Inertia fuel shutoff (IFS) switch needs to be reset. Open FPDM ground circuit. Open circuit to FPDM PWR RLY. Open FPDM PWR circuit. Open or shorted FPM circuit (engine should start). Damaged IFS switch. Damaged FPDM PWR RLY. Damaged FPDM. Damaged PCM. Also for Mustang: Open…

P1234 Fuel Pump Driver Module Off Line Symptoms – Engine Light ON (or Service Engine Soon Warning Light)

P1235 Fuel Pump Control Out Of Range Possible causes – Faulty Fuel Pump Drive Module (FPDM)– FPDM harness is open or shorted– FPDM circuit poor electrical connection– Faulty Powertrain Control Module (PCM) Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1235 Description The P1235 code indicates the Fuel Pump Drive Module (FPDM)…