My check engine light came on:

Here are the codes
04 03 Throttle position sensor
11 04 Improper shifting to 2nd Gear
11 05 Improper shifting to 3rd Gear
12 06 Throttle position sensor (Automatic Transmission)

I have a 97 SE Auto, and it is running and shifting fine.

Has anyone ever gotten this set of codes?

Thx for any help

 

 

reset your ecu and see if the codes come back...

it would seem to me that your Throttle postion and the time when your automatic changes gears do not match.your Transmisson Control Unit has set shift points for set RPM's.. they may not be matching right now.

Reset your ecu and see if they come back in a few days

 

I will do that,

Thanks

 

DTC 0403

Diagnostic Trouble Code 0403 points to a problem with the Throttle Position Sensor. The TPS responds to the
accelerator pedal movement. This sensor is a kind of potentiometer which transforms the throttle position into
output voltage, and emits the voltage signal to the Engine Control Module. In addition, the sensor detects the
opening and closing speed of the throttle valve and feeds the voltage signal to the ECM.

This malfunction may be detected in three different circumstances.

A) An excessively low or high voltage from the sensor is sent to the ECM. In this situation the ECM enters
fail-safe mode (acceleration will be poor) and turns on the Malfunction Indicator Lamp.

Possible causes include ...
- Harness or connectors (the throttle position sensor is open or shorted.)
- faulty Throttle Position Sensor

B) A high voltage from the sensor is sent to the ECM under light load driving conditions.
Possible causes include ...
- Harness or connectors (the throttle position sensor is open or shorted.)
- faulty Throttle Position Sensor
- fuel injector(s)
- Camshaft Position Sensor
- Mass Air Flow Sensor

C) A low voltage from the sensor is sent to the ECM under heavy load driving conditions.
Possible causes include ...
- Harness or connectors (the throttle position sensor is open or shorted.)
- intake air leaks
- faulty Throttle Position Sensor

 

DTC 1206
Diagnostic Trouble Code 1206 points to a problem with the TPS.

The Throttle Position Sensor detects the throttle valve position and sends a signal to the Transmission Control
Module. The Throttle Position Switch consists of a Wide Open Throttle position switch and a closed throttle position
switch. The WOT switch sends a signal to the TCM when the throttle is open at least 1/2 of the WOT position.
The closed throttle position switch sends a signal to the TCM when the throttle is fully closed. The Sensor and
Switch are integrated into one unit designated TPS.

This malfunction may be detected when the TCM receives an excessively low or high voltage from the sensor.
Possible causes include ...
- Harness or connectors (the throttle position sensor is open or shorted.)
- faulty Throttle Position Sensor
- faulty Throttle Position Switch

 

The Throttle Position Sensor seems to be the culprit and the common thread, which could be causing your 1104 and 1105 codes. Those in particular are rare enough to have never been covered on the dot org database.

 

Hey Bill since no one ever read my ECU thread can you tell me what any of the 14xx codes are? Aparrently they are only on '99s and aren't very common. They also are NOT in the ECU decoder so searching doesn't help.
http://forums.maxima.org/showthread....=sensor+ground
-hype

 

Hype,


Sorry, I have yet to find them. It would be nice to have a '99 FSM right now........


cyclemax had a similar problem, so you may want to PM him.

http://forums.maxima.org/showthread....highlight=1405

 

Bill, I emailed him to see if he ever figured out the problem. Also do you know where in the FSM it lists the codes? I'm not all that familiar with the FSM and I haven't bought one yet. I was waiting to see if it was going to be available on CD like the 5th gens.
Maybe I'll just break down and buy a FSM when I get back to Dallas.
Thanks again
-hype

 

My collective research is the result of Daniel B. Martin's hard work and his reference to the '99 FSM. Almost all my ECU knowledge has come from his posts on these forums and are usually easily searchable by number.

If I knew I was keeping my 99, I would get a FSM. It will run you anywhere from $100 to $125, though......and it's only in book form.

 

Thanks Bill