Code p2138 - 2006 Nissan Altima

Your vehicle has drive - by - wire , electronic throttle control . P2138 Gm Accelerator Pedal Position Sensor 1 2 Correlation

There are videos on youtube on this P2138 APPS Accelerator Pedal Position Sensor Fix 3 5L Chevrolet Impala

Fault code p2138 if you know it? If you don't. Google it.

P0411 is an air injection pump code
P1125 and P2138 are both accelerator pedal position sensor codes

Throttle/pedal position sensor recieving/sending out of range , i'd change the tps

Throttle position sensor code. Check the wire is not damaged and the connected is secure. This is laced on the throttle body.
good luck

One is a multiple misfire and the o2 sensor

code p2138 refers to--throttle position sensor/switch D/E voltage correlation causes ---wiring--TP sensor/switch I would check that the switch is connected properly or I would replace the throttle position sensor/switch.

Were the APP codes there BEFORE they replaced the BCM? APP codes usually are an indicator the throttle body needs to be replaced. As a precaution, some recommend to replace the throttle body AND the sensor on the gas pedal together. Unfortunately, this is a dealer only repair most o the time, since the ECM will have to be flashed to sync the new sensors.

There is a GM Technical Service Bulletin (TSB) on this issue, below is a summary;

#07-06-04-019A: Intermittent MIL/SES, DTC P2138 with Reduced Engine Power (Repair Instrument Panel (IP) to Body Harness Connector)

Models: 2005-2008 GM Passenger Cars and Light Duty Trucks (Including Saturn)
2005-2008 HUMMER H2
2006-2008 HUMMER H3
2005-2008 Saab 9-7X

Condition

Some customers may comment on an intermittent MIL/SES light Illuminated with a message center or an indicator that displays Reduced Engine Power. DTC P2138 - Accelerator Pedal Position (APP) Sensor 1-2 Correlation may be set. The voltage difference between APP sensor 1 and APP sensor 2 exceeds a predetermined value for more than a brief period. Refer to DTC P2138 in SI for further diagnostics.

Cause

On some vehicles, the IP to body harness connector, which carries the APP signal to the ECM/PCM, is located in the left hand kick panel area or inside the IP. Water intrusion into these areas could cause an electrical short in the APP circuits setting a P2138 code.

Correction

Note: Make sure that no add-on/aftermarket equipment is electrically connected to the APP signals or to the other ECM/PCM five volt reference or return lines. These can generate false P2138 and/or other ETC System DTCs. If there are other engine DTCs besides P2138, such as MAP sensor faults (i.e. P0107, P0108), resolve these first before attempting to diagnose P2138 DTCs.

Important: Refer to DTC P2138 in SI to confirm that the ETC pedal is operating correctly.

Locate the IP to body harness connector, which may be located in and around the left hand kick panel area or inside the IP. Check to see if there is a water leak into the area and repair as necessary. Use a water hose to determine the source of a water leak and effectiveness of repair. Some examples of potential water leaks are: A-pillar seals, sunroof drain lines (if so equipped) and windshield/cowl sealing. Finally, repair or replace the IP to body harness connector, making sure no corrosion or debris is left on or between the terminals.