Need to know what r these codes p0128,p0404,p0405,p1258,and u0101
4 Answers
P0128 PONTIAC - Engine Coolant Temperature Below Thermostat Regulating Temperature...Possible causes; Leaking or stuck open thermostat, Low engine coolant level, Insufficient warm up time, Faulty engine coolant temperature sensor, Engine coolant temperature sensor harness is open or shorted, Engine coolant temperature sensor circuit poor electrical connection.......P0404 PONTIAC - Exhaust Gas Recirculation Open Position Performance...Possible causes; EGR volume control valve stuck open or closed, Faulty EGR volume control solenoid valve, EGR volume control solenoid valve harness is open or shorted, EGR volume control solenoid valve circuit poor electrical connection, EGR temperature sensor and circuit......P0405 PONTIAC - Exhaust Gas Recirculation Position Sensor Circuit Low Voltage...Possible causes; Faulty EGR volume control solenoid valve, Carbon built up on EGR valve, EGR volume control solenoid valve harness is open or shorted, EGR volume control solenoid valve circuit poor electrical connection, Faulty EGR temperature sensor and circuit......
P1258 - Pedal Correlation PDS1 and PDS2...Possible causes; Faulty Engine Coolant Temperature. Engine Coolant Temperature harness is open or shorted. Engine Coolant Temperature circuit poor electrical connection......U0101 PONTIAC - Lost Communication With Transmission Control Module...Possible causes; Faulty Transmission Control Module (TCM), TCM harness is open or shorted, TCM circuit poor electrical connection.
0128- possible thermostat issue 0404- EGR VALVE possible issue 0405- open circuit EGR 1258- coolant temp sensor All could be related to thermost.
