I went to Advance Auto Parts and had them scan my car'* computer. The check engine light came on a lot when I bought the car, but since I did a minor tune-up.. plugs and wires, and especially after I had VIOC run some chemicals in to clean the intake, and fuel system, this check engine light rarely ever comes on.

My car sometimes won't start, but if I remove the key, and insert it again, it starts fine. Still no check engine light..

My engine also runs a little rough at times, and idles rough too. It'* sometimes smooth as silk too. and it also seems to have that shudder in overdrive like many others have described in different ways . this happens at 1500 rpm range mostly. Maybe I should also mention I hear an odd sound like a rough hummm when I'm at 1500 rpm, and have the A/C on. My wife mistook that for the power steering pump, since it sounds similar when it'* low on fluid.. (gotta fix that leak too) ..

Anyways, the slip I got from Advance Auto said:

P1406
Manfacurer contrl.
Auxiliary emission controls

Thanks, Sam B.

As for the funny sound/feel at 1500, my car does that too. It'* not actually the a/c, it'* whenever the blower fan is on for the HVAC system.

Strange, eh? Haven't figured out why...

Anyhew, check the link at the top of the page that says tech info to check what that code means...

I took a look in techinfo and couldn't find a P142 or P1142. Anyone with a 96 FSM that can help out it would be appreciated. Yes I googled it!

On the blower motor...haha Only when the A/C'* on and only in my 97. Driving me nuts but it'* working good...

That'* a strange lookin code... anyone have an idea? these are the codes that I can look up for a '96... and it'* nowhere in there...

Automatic Transaxle - 4T60-E
DTC P0751 1-2 Shift Solenoid Valve Performance 3.8L VIN K H car
DTC P0751 1-2 Shift Solenoid Valve Performance 3.8L VIN K C car
DTC P0502 Vehicle Speed Sensor (VSS) Circuit Low Input 3.8L VIN K
DTC P0502 Vehicle Speed Sensor (VSS) Circuit Low Input 3.8L VIN 1
DTC P0724 Brake Switch Circuit High Input 3.8L VIN K
DTC P0724 Brake Switch Circuit High Input 3.8L VIN 1
DTC P0719 Brake Switch Circuit Low Input 3.8L VIN K
DTC P0719 Brake Switch Circuit Low Input 3.8L VIN 1
DTC P0560 System Voltage 3.8L VIN K
DTC P0560 System Voltage 3.8L VIN 1
DTC P1870 Transmission Component Slipping 3.8L VIN K
DTC P1870 Transmission Component Slipping 3.8L VIN 1
DTC P1864 TCC Solenoid Electrical 3.8L VIN K
DTC P1864 TCC Solenoid Electrical 3.8L VIN 1
DTC P1860 TCC PWM Solenoid Circuit Electrical 3.8L VIN K
DTC P1860 TCC PWM Solenoid Circuit Electrical 3.8L VIN 1
DTC P1812 Transmission Fluid Overtemperature 3.8L VIN K
DTC P1812 Transmission Fluid Overtemperature 3.8L VIN1
DTC P0758 2-3 (B) Shift Solenoid Electrical 3.8L VIN K
DTC P0758 2-3 (B) Shift Solenoid Electrical 3.8L VIN 1
DTC P0756 2-3 (B) Shift Solenoid Performance 3.8L VIN K
DTC P0756 2-3 (B) Shift Solenoid Performance 3.8L VIN 1
DTC P0753 1-2 Shift Solenoid Circuit Electrical 3.8L VIN K
DTC P0753 1-2 Shift Solenoid Circuit Electrical 3.8L VIN 1
DTC P0751 1-2 Shift Solenoid Valve Performance 3.8L VIN K
DTC P0751 1-2 Shift Solenoid Valve Performance 3.8L VIN 1
DTC P0742 TCC System Stuck On 3.8L VIN K
DTC P0742 TCC System Stuck On 3.8L VIN 1
DTC P0713 Transmission Fluid Temperature (TFT) Sensor Circuit High Input 3.8L VIN K
DTC P0713 Transmission Fluid Temperature (TFT) Sensor Circuit High Input 3.8L VIN 1
DTC P0712 Transmission Fluid Temperature (TFT) Sensor Circuit Low Input 3.8L VIN K
DTC P0712 Transmission Fluid Temperature (TFT) Sensor Circuit Low Input 3.8L VIN 1

Engine Controls - 3.8L
DTC P1381 Misfire Detected - No Communication with Brake Control Module
DTC P1441 Evaporative Emission (EVAP) System Flow During Non-Purge H-Car with VIN K Only
DTC P0420 Catalyst System Low Efficiency
DTC P0300 Engine Misfire Detected
DTC P0171 Fuel Trim System Lean
DTC P0172 Fuel Trim System Rich
DTC P0141 HO2S Heater Performance Sensor 2
DTC P0138 HO2S Circuit High Voltage Sensor 2
DTC P0137 HO2S Circuit Low Voltage Sensor 2
DTC P0132 HO2S Circuit High Voltage Sensor 1
DTC P0135 HO2S Heater Performance Sensor 1
DTC P0131 HO2S Circuit Low Voltage Sensor 1
DTC P1675 Evaporative Emission (EVAP) Vent Solenoid Control Circuit
DTC P1662 Cruise Control Inhibit Output Circuit
DTC P1655 Evaporative Emission (EVAP) Purge Solenoid Control Circuit
DTC P1654 Air Conditioning (A/C) Clutch Relay Control Circuit
DTC P1652 Cooling Fan Relay 2 Control Circuit
DTC P1653 Traction Control Delivered Torque Output Circuit
DTC P1651 Cooling Fan Relay 1 Control Circuit
DTC P1645 Supercharger Boost Solenoid Control Control Circuit
DTC P1643 Fuel Pump Speed Output Circuit
DTC P1641 Malfunction Indicator Lamp (MIL) Control Circuit
DTC P1639 5 Volt Reference 2 Circuit
DTC P1635 5 Volt Reference Circuit
DTC P1629 Theft Deterrent Fuel Enable Signal Not Received
DTC P1626 Theft Deterrent Fuel Enable Signal Lost
DTC P1619 Engine Oil Life Monitor Reset Switch Circuit
DTC P1573 Lost Communications with Brake/Traction Control (EBTCM) System
DTC P1554 Cruise Control Feedback Circuit
DTC P1571 Traction Control Torque Request Circuit
DTC P1520 Park/Neutral Position (PNP) Switch Circuit
DTC P1442 EVAP Vacuum Switch Circuit
DTC P1441 Evaporative Emission (EVAP) System Flow During Non-Purge All Except H-Car with VIN K
DTC P1406 Exhaust Gas Recirculation (EGR) Position Sensor Performance
DTC P1374 Crankshaft Position (CKP) High to Low Resolution Frequency Correlation
DTC P1361 Ignition Control (IC) Circuit Low Voltage
DTC P1350 Bypass Line Monitor
DTC P1257 Supercharger Engine Overboost
DTC P1200 Injector Control Circuit
DTC P1134 HO2S Transition Time Ratio Sensor 1
DTC P1133 HO2S Insufficient Switching Sensor 1
DTC P1122 Throttle Position (TP) Sensor Circuit Intermittent Low Voltage
DTC P1121 Throttle Position (TP) Sensor Circuit Intermittent High Voltage
DTC P1114 Engine Coolant Temperature (ECT) Sensor Circuit Intermittent Low Voltage
DTC P1115 Engine Coolant Temperature (ECT) Sensor Circuit Intermittent High Voltage
DTC P1112 Intake Air Temperature (IAT) Sensor Circuit Intermittent Low Voltage
DTC P1111 Intake Air Temperature (IAT) Sensor Circuit Intermittent High Voltage
DTC P1107 Manifold Absolute Pressure (MAP) Sensor Circuit Intermittent Low Voltage
DTC P1106 Manifold Absolute Pressure (MAP) Sensor Circuit Intermittent High Voltage
DTC P0706 Trans Range Switch Performance
DTC P0705 Trans Range Switch Circuit
DTC P0602 Control Module Not Programmed
DTC P0601 Control Module Read Only Memory (ROM)
DTC P0560 System Voltage
DTC P0530 Air Conditioning (A/C) Refrigerant Pressure Sensor Circuit
DTC P0507 Idle Speed High
DTC P0506 Idle Speed Low
DTC P0446 Evaporative Emission (EVAP) Vent System Performance
DTC P0442 Evaporative Emission (EVAP) System Small Leak Detected
DTC P0441 Evaporative Emission (EVAP) System No Flow During Purge
DTC P0440 Evaporative Emission (EVAP) System
DTC P0401 Exhaust Gas Recirculation (EGR) Flow Insufficient
DTC P0341 Camshaft Position (CMP) Sensor Performance
DTC P0336 Crankshaft Position (CKP) Sensor Circuit
DTC P0326 Knock Sensor Noise Channel High Voltage
DTC P0327 Knock Sensor (KS) Circuit
DTC P0325 Knock Sensor Module Performance
DTC P0140 HO2S Circuit Insufficient Activity Sensor 2
DTC P0134 HO2S Circuit Insufficient Activity Sensor 1
DTC P0133 HO2S Slow Response Sensor 1
DTC P0125 Engine Coolant Temperature (ECT) Insufficient for Closed Loop Fuel Control
DTC P0123 Throttle Position (TP) Sensor Circuit High Voltage
DTC P0122 Throttle Position (TP) Sensor Circuit Low Voltage
DTC P0121 Throttle Position (TP) Sensor Performance
DTC P0118 Engine Coolant Temperature (ECT) Sensor Circuit High Voltage
DTC P0117 Engine Coolant Temperature (ECT) Sensor Circuit Low Voltage
DTC P0113 Intake Air Temperature (IAT) Sensor Circuit High Voltage
DTC P0112 Intake Air Temperature (IAT) Sensor Circuit Low Voltage
DTC P0108 Manifold Absolute Pressure (MAP) Sensor Circuit High Voltage
DTC P0107 Manifold Absolute Pressure (MAP) Sensor Circuit Low Voltage
DTC P0103 Mass Air Flow (MAF) Sensor Circuit High Frequency
DTC P0106 Manifold Absolute Pressure (MAP) System Performance
DTC P0102 Mass Air Flow (MAF) Sensor Circuit Low Frequency
DTC P0101 Mass Air Flow (MAF) Sensor Performance

It looks like the code is one digit short. Aren't they typically 1 alpha, then 4 numerics?

yeah, they are. and i can't even figure out what it would be with the digit put back in, based on the descriptions i have listed there...

If you add a "0" after the "P", I'm showing:

That doesn't make much sense with the problem he'* describing.

right

what I meant was, no combination of what he had made any sense with the codes listed, as far as what he was told it meant. possible they just screwed up writing it down...

Sooo... step #1 - get car re-read. get the right code

just let them know that it should be a 4 digit code... maybe even take the list I made up there with you, and make sure they've got it right before you go...

oops. I did miss a digit. I edited above on my original post. I'm sorry about that guys.


It looks like maybe this is it?

DTC P1406 Exhaust Gas Recirculation (EGR) Position Sensor Performance

What is that, and how do I remedy this?

I will say, I couldn't find info on this at any parts store locally, but you guys seem to come through for me.

Thanks again.. now what do I do?
Sam