96 Ls400-Cleaned My Throttle Body Now Pulling 5 Cel Codes

[chrisgsemail]

96 ls400 with 250,000 miles.Tune up 3 months ago, motor and trans mount replaced 2 weeks ago.

So I took off my throttle body and cleaned large amount of the black sludge from TB and inside the intake plenum. I also removed PS pump and alt to repair pump leak and clean up mess. Some coolant leaked out when hose was removed. Store is 12 miles away so I just added water as a temparary solution. Started car- CEL came on and thru 5 codes

-P0308

-P1509

-P0113

-P0118

-P1298

I checked for vacuum leaks

before the "cleaning" the car drove beautifully with no CEL. I put 10 miles on it since. Ive read a buch of post and would like some suggestions on where to start. Im hesitant about doing the "Italion tune up".

I'm getting the ecm coolant temp sensor and will flush the coolant today.

All feed back is appriecaited.

[Micah.Berry]

Possibly pull the battery terminal, allow it to sit for a few minutes so the computer resets, and then see if you get another code once you return the battery wire to its terminal. Kind of a goofy suggestion, I know. Some of those codes could possibly be linked to mass airflow sensor?

[billydpowell]

here is the master list: I dont see yours???

also check this: http://www.samarins.com/diagnose/codes.html

OBD II

P0100 Mass Air Flow Circuit.

P0101 Mass Air Flow Circuit Range/Performance.

P0105 Manifold Absolute Pressure Circuit.

P0106 MAP/BARO Circuit Range/Performance.

P0110 Intake Air Temperature Circuit.

P0115 Engine Coolant Temperature Circuit.

P0116 Engine Coolant Temperature Range/Performance.

P0120 Throttle Pedal Sensor Switch "A" Circuit.

P0121 Throttle Pedal Sensor Switch "A" Circuit Range/Performance.

P0125 Insufficient Coolant Temperature for Closed Loop Fuel Control.

P0130 Heated Oxygen Sensor Circuit - Bank 1 Sensor 1.

P0133 Heated Oxygen Sensor Circuit Slow Response Bank 1 Sensor 1.

P0135 Heated Oxygen Sensor Circuit - Bank 1 Sensor 1.

P0136 Heated Oxygen Sensor Circuit - Bank 1 Sensor 2.

P0141 Heated Oxygen Sensor Circuit - Bank 1 Sensor 2.

P0150 Heated Oxygen Sensor Circuit - Bank 2 Sensor 1.

P0153 Heated Oxygen Sensor Circuit Slow Response Bank 2 Sensor 1.

P0155 Heated Oxygen Sensor Circuit - Bank 2 Sensor 1.

P0156 Heated Oxygen Sensor Circuit - Bank 2 Sensor 2.

P0161 Heated Oxygen Sensor Circuit - Bank 2 Sensor 2.

P0170 Fuel Trim malfunction.

P0171 System too Lean.

P0172 System too Rich.

P0201 Injector Circuit - Cyl. 1.

P0202 Injector Circuit - Cyl. 2.

P0203 Injector Circuit - Cyl. 3.

P0204 Injector Circuit - Cyl. 4.

P0205 Injector Circuit - Cyl. 5.

P0206 Injector Circuit - Cyl. 6.

P0300 Random Misfire.

P0301 Misfire Detected - Cyl. 1.

P0302 Misfire Detected - Cyl. 2.

P0303 Misfire Detected - Cyl. 3.

P0304 Misfire Detected - Cyl. 4.

P0305 Misfire Detected - Cyl. 5.

P0306 Misfire Detected - Cyl. 6.

P0325 Knock Sensor 1 Circuit.

P0330 Knock Sensor 2 Circuit.

P0335 Crankshaft Position Sensor "A" Circuit.

P0336 Crankshaft Position Sensor "A" Circuit Range/Performance.

P0340 CMP Sensor Circuit malfunction.

P0385 Crankshaft Position Sensor "B" NE2 Circuit.

P0401 EGR Flow Insufficient.

P0402 EGR Flow Excessive.

P0420 Catalyst System Efficiency below Threshold.

P0430 Catalyst System Efficiency below Threshold Bank 2.

P0440 EVAP Control System.

P0441 EVAP Control System Improper Purge Flow.

P0446 EVAP Control System Vent Control.

P0450 EVAP Control System Pressure Sensor.

P0451 EVAP Control System Pressure Sensor Range/Performance.

P0500 Vehicle Speed Sensor.

P0505 Idle Speed Control System.

P0510 Close Throttle Position Switch.

P1100 BARO Sensor Circuit.

P1120 Accelerator Pedal Position Sensor Circuit.

P1121 Accelerator Pedal Position Sensor Range/Performance Problem.

P1125 Throttle Control Motor Circuit.

P1126 Magnetic Clutch Circuit.

P1127 ETCS Actuator Power Source Circuit.

P1128 Throttle Control Motor Lock.

P1129 Electric Throttle Control System.

P1130 Air-Fuel Sensor Circuit Range/Performance.

P1133 Air-Fuel Sensor Circuit Response.

P1135 Air-Fuel Sensor Heater Circuit Response.

P1150 A/F Sensor Circuit Range/Performance.

P1153 A/F Sensor Circuit Response.

P1155 A/F Sensor Heater Circuit.

P1200 Fuel Pump Relay Circuit.

P1300 Igniter Circuit - No. 1.

P1310 Igniter Circuit - No. 2.

P1335 No Crankshaft Position Sensor Signal - Engine Running.

P1349 VVT System.

P1400 Sub-Throttle Position Sensor.

P1401 Sub-Throttle Position Sensor Range/Performance Problem.

P1405 Turbo Pressure Sensor Circuit.

P1406 Turbo Pressure Sensor Range/Performance Problem.

P1410 EGR Valve Position Sensor Circuit.

P1411 EGR Valve Position Sensor Circuit Range/Performance.

P1500 Starter Signal Circuit.

P1510 Boost Pressure Control Circuit.

P1511 Boost Pressure Low.

P1512 Boost Pressure High.

P1520 Stop Lamp Switch Signal.

P1565 Cruise Control Main Switch Circuit.

P1600 ECM.

P1605 Knock Control CPU.

P1630 Traction Control System.

P1633 ECM.

P1652 Idle Air Control Valve Control Circuit.

P1656 OCV Circuit.

P1658 Wastegate Valve Control Circuit.

P1661 EGR Circuit.

P1662 EGR by-pass Valve Control Circuit.

P1780 Park/Neutral Switch.

[chrisgsemail]

Yes I tried that. re-seated all connectors double checked for vacuum leaks.Im going to pick up the ecm coolant temp switch and flush the radiator and try some fuel injector cleaner. Ill post back tonight with update and hopefully progress.

[landar]

I would guess that you disturbed something when taking the air intake apart. It is very easy to crack the air intake duct work because they are old and brittle. Then there is the possibility that the connector to the MAF is not seated. P0308 is a cylinder 8 misfire. I know that you have tried everything. But recheck connectors again and the duct work for cracks. Reset all codes and see what shows up.

[curiousB]

96 ls400 with 250,000 miles.Tune up 3 months ago, motor and trans mount replaced 2 weeks ago.

So I took off my throttle body and cleaned large amount of the black sludge from TB and inside the intake plenum. I also removed PS pump and alt to repair pump leak and clean up mess. Some coolant leaked out when hose was removed. Store is 12 miles away so I just added water as a temparary solution. Started car- CEL came on and thru 5 codes

-P0308

-P1509

-P0113

-P0118

-P1298

I checked for vacuum leaks

before the "cleaning" the car drove beautifully with no CEL. I put 10 miles on it since. Ive read a buch of post and would like some suggestions on where to start. Im hesitant about doing the "Italion tune up".

I'm getting the ecm coolant temp sensor and will flush the coolant today.

All feed back is appriecaited.

Did you use a new gasket when you replaced throttle body?

Did you clean the IACV as well?

P1509 might be IACV related (it is for BMW, GM, and Ford).

P0118 is coolant temp sensor and may just mean an open circuit.

Given all this occurred at once whch that connections are clean and tight. No card cleaner as leached into any sensors, and you have a seal on all vacuum points, TB gasket, intake air duct and so on.