Question about 2003 Porsche 911 Carrera
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Posted on Jan 02, 2017
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May 26, 2016 | Saturn Cars & Trucks
The barometric pressure (BARO)
The manifold absolute pressure (MAP)
The intake air temperature (IAT)
The engine RPM
P0121 The predicted air flow and the predicted MAP combined are outside a calibrated range for more than 3 seconds.
Inspect thoroughly for any type of leak or restriction
Air leaks at throttle body mounting area and intake manifold sealing surfaces
Throttle body for dirt, debris, and coking--Refer to Throttle Body Cleaning.
Increase the engine speed slowly to 3,000 RPM, then back to idle.
Exit from the snapshot and review the data.
Observe the Mass Air Flow (MAF) Sensor parameter frame by frame with a scan tool. The MAF sensor g/s should change smoothly and gradually as the engine speed is increased and is returned to idle.
If the MAF sensor g/s does not change smoothly and gradually as the engine speed is increased and is returned to idle, refer to DTC P0101 or P1101.
Broken throttle shaft
Any throttle body damage
If any of these conditions exist, replace the throttle body assembly.
Jun 20, 2015 | 2008 GMC Sierra 1500 2WD
Sep 30, 2014 | 2005 Toyota Tacoma PreRunner
Aug 24, 2014 | Cars & Trucks
The engine control module (ECM) learns the idle position of the throttle plate to ensure the correct idle. Anytime the throttle body is cleaned or replaced, the ECM must learn the new throttle position. The idle may be unstable or a DTC may set if the throttle position is not learned.
Conditions for Running the Throttle Learn Procedure
• DTCs P0101, P0102, P0103, P0107, P0108, P0111, P0112, P0113, P0506, and P0507 are not set.
• The engine speed is between 450-4,000 RPM.
• The manifold absolute pressure (MAP) is greater than 5 kPa.
• The mass air flow (MAF) is greater than 2 g/s.
• The ignition 1 voltage is greater than 10 volts.
Important: Do NOT perform this procedure if DTCs are set. Refer to Diagnostic Trouble Code
(DTC) List - Vehicle.
1. Start and idle the engine in PARK for 3 minutes.
2. With a scan tool, monitor desired and actual RPM.
3. The ECM will start to learn the new idle cells and Desired RPM should start to decrease.
4. Ignition OFF for 60 seconds.
5. Start and idle the engine in PARK for 3 minutes.
6. After the 3 minute run time the engine should be idling normal.
Important: During the drive cycle the check engine light may come on with idle speed DTCs. If idle speed codes are set, clear codes so the ECM can continue to learn.
* If the engine idle speed has not been learned the vehicle will need to be driven at
speeds above 70 km/h (44 mph) with several decelerations and extended idles.
7. After the drive cycle, the engine should be idling normally.
* If the engine idle speed has not been learned, turn OFF the ignition for 60 seconds
and repeat step 6.
8. Once the engine speed has returned to normal, clear DTCs.
Mar 04, 2014 | 1995 GMC Sierra
Oct 03, 2013 | 2006 Dodge Ram 3500 Truck
P1001 Key on engine running unable to complete; key on engine running aborted
P1100 Mass air flow sensor intermittent
P1101 Mass air flow sensor out of self test range
P1104 Mass Airflow (MAF) Sensor Ground Circuit Malfunction
P1107 Left MAP Sensor Circuit
P1108 Right MAP Sensor Circuit
P1112 IATS Circuit High Voltage
P1113 IATS Circuit Low Voltage
P1121 Pedal Position Sensor Circuit A Range/Performance
P1122 Pedal Position Sensor Circuit A Low Voltage
P1123 Pedal Position Sensor Circuit A High Voltage
P1137 No Rear HO2S Response
P1138 No Rear HO3S Response
P1157 No Rear HO2S Response
P1158 No Rear HO3S Response
P1171 All Cylinders Too Lean
P1172 All Cylinders Too Rich
P1176 Adaptive Fuel Metering Trim Too Lean
P1177 Adaptive Fuel Metering Trim Too Rich
P1178 Adaptive Fuel Metering Trim Too Lean
P1179 Adaptive Fuel Metering Trim Too Rich
P1187 Both Front HO2S Heater Circuits (High Resistance)
P1188 Both Front HO2S Heater Circuits (Open Short to Ground High Resistance)
P1190 Both Front HO2S Heater Circuits (High Battery Voltage Short to Voltage)
P1193 Both Front HO2S Heater Circuits (High Resistance MAF Sensor Fault)
P1194 Both Front HO2S Heater Circuits (Open Short to Ground High Resistance)
P1196 Both Front HO2S Heater Circuits (High Battery Voltage Short to Ground)
P1198 Fuel Level Sensor (High Voltage)
P1199 Fuel Level Sensor (Low Voltage)
P1201 No. 1 Fuel Injector
P1202 No. 2 Fuel Injector
P1203 No. 3 Fuel Injector
P1204 No. 4 Fuel Injector
P1205 No. 5 Fuel Injector
P1206 No. 6 Fuel Injector
P1221 Pedal Position Sensor Circuit B Range/Performance
P1222 Pedal Position Sensor Circuit B Low Voltage
P1223 Pedal Position Sensor Circuit B High Voltage
P1224 Electronic Throttle Control Position Error
P1226 Mechanical Guard Circuit Range Performance
P1227 Mechanical Guard Circuit Low Input
P1228 Mechanical Guard Circuit High Input
P1229 Throttle Control Circuit Malfunction
P1230 Fuel Pump Relay Malfunction
P1235 VSV 1 Circuit Range/Performance
P1236 VSV 1 Vacuum Circuit Failure
P1237 VSV 2 Atmosphere Circuit Failure
P1238 VSV 3 Release Circuit Failure
P1240 Throttle Position Sensor Voltage Malfunction//Sensor Reference Voltage Low (Throttle
Fuel Tank Pressure)
P1241 Throttle Position Sensor Voltage Low Input//Reference Voltage Low (Throttle Fuel
P1242 Throttle Position Sensor Voltage High Input
P1243 Throttle Position Sensor Ground Malfunction
P1245 Crank Signal Low Input
P1246 Crank Signal High Input
P1313 Misfire Catalyst Damage Bank No. 1
P1314 Misfire Catalyst Damage Bank No. 2
P1315 Misfire Excess Emissions
P1316 Misfire Rate Above Limit
P1335 Crankshaft Position Sensor Circuit
P1336 Camshaft Position Sensor (CMP) Circuit Performance
P1361 Ignition Coil Primary Circuit (Cylinder No. 1)
P1362 Ignition Coil Primary Circuit (Cylinder No. 2)
P1363 Ignition Coil Primary Circuit (Cylinder No. 3)
P1364 Ignition Coil Primary Circuit (Cylinder No. 4)
P1365 Ignition Coil Primary Circuit (Cylinder No. 5)
P1366 Ignition Coil Primary Circuit (Cylinder No. 6)
P1367 Ignition Monitor (Bank A)//Ignition System Failure Group 1
P1368 Ignition Monitor (Bank B)//Ignition System Failure Group 2
P1371 Early Activation Ignition Coil (Cylinder No. 1)
P1372 Early Activation Ignition Coil (Cylinder No. 2)
P1373 Early Activation Ignition Coil (Cylinder No. 3)
P1374 Early Activation Ignition Coil (Cylinder No. 4)
P1375 Early Activation Ignition Coil (Cylinder No. 5)
P1376 Early Activation Ignition Coil (Cylinder No. 6)
P1392 Variable Valve Timing Solenoid A Low Input
P1393 Variable Valve Timing Solenoid A High Input
P1396 Variable Valve Timing Solenoid B Malfunction
P1397 Variable Valve Timing Solenoid B Low Input
P1398 Variable Valve Timing Solenoid B High Input
P1400 EGR Valve Position Circuit (Valve Sticking Open or Short)
P1401 EGR Valve Position Circuit (Open Short to Ground)
P1408 EGR Temperature Sensor Circuit
P1409 EGR Valve Circuit
P1440 EVAP Purge Valve Open
P1441 EVAP Valve Circuit
P1443 EVAP Valve Circuit
P1447 EVAP Valve Circuit
P1448 EVAP Valve Circuit
P1454 EVAP System
P1474 Charge Air Coolant Pump Relay
P1475 Radiator Fans Slow Malfunction
P1476 Radiator Fans Fast Parallel Circuit Malfunction
P1506 Idle Speed Control Circuit (Low RPM; Bank B)
P1507 Idle Speed Control Circuit (High RPM; Bank B)
P1508 Idle Speed Control Circuit
P1509 Idle Speed Control Circuit
P1512 Throttle Position Sensor Idle Switch Sense Circuit
P1513 Throttle Position Sensor Idle Switch Sense Circuit
P1514 Park/Neutral Position Switch High Load Neutral/Drive
P1516 Gear Change Park/Neutral Malfunction
P1517 Engine Cranking Park/Neutral Malfunction
P1607 MIL Output Circuit
P1608 Automatic Transmission
P1609 Internal ECM Error
P1641 Fuel Pump Relay No. 1
P1646 Fuel Pump Relay No. 2
P1739 Automatic Transmission
P1775 Transmission Control Module MIL Circuit
P1776 Torque Reduction Request Signal
P1777 Torque Reduction Circuit
P1780 Automatic Transmission
P1781 Automatic Transmission
P1782 Automatic Transmission
P1783 Automatic Transmission
P1785 Automatic Transmission
P1790 Automatic Transmission
P1791 Automatic Transmission
P1792 Automatic Transmission
P1794 Automatic Transmission
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