What does check engine light P2138 code mean and how to fix it?

FRV OR CRV?
FRV IS EUROPE CAR ONLY.
ENGINE REAL NAME: 1.8 L R18A1 I4
SAME ENGINE AS SOME CIVICS HERE, USA
AUTO OR MANUAL TRANS? NOT TOLD
WILD GUESS AUTO?
sm states


Trouble Code Conditions:
APP Sensor A/B (TP Sensor D/E) Incorrect Voltage Correlation
Possible Causes:

• Intermittent failure. Check for poor connections or loose terminals at the APP sensor and the PCM.

Trouble Code: P2138 (1.8L L4 VIN - Auto)
APP Sensor A/B (TP Sensor D/E) Incorrect Voltage Correlation Print this code data so you dont know what APP means.
wall that TBW tech jargon, Throttle by wire.
it is a THROTTLE error.!
that has 3 or 4 TPS sensors and a motor drive to TV
the error means 2 of the sensors do not agree, Correlation error is that.
so is bad TB or bad pedal pots
the service manual tells you the tests with a meter to prove which POT lies .
APP is gas pedal module just above right foot.
TPS TV sensors are inside the TB throttle body, and most times
whole thing is changed out. to fix it. TB
The TB is that things the Air cleaner connects to, on top of engine
it is a large chuck of aluminum .

called TB (classic name)
THROTTLE ACTUATOR and
THROTTLE POSITION (TP) SENSOR
top center of engine , close to fire wall , facing engine.


photo below (civic) shows.
A does not agree with B
A = gas pedal pair of pots
B= TB
my wild guess is pedal module bad.
my guess APP pedal B is bad. and most cheap to buy. (?)

You need a good auto-electrician to diagnose and fix that lot!

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The P2127 code means that the throttle or pedal position sensor switch E has a low input. The pedal position sensor is a sensor found on the gas pedal. The sensor tells the ECU when the gas pedal is depressed and how far it is depressed.

P2127 OBD-II Trouble Code: Throttle/Pedal Position Sensor ...

The P2138 trouble code indicates that the Engine Control Module has detected a malfunction within the D and/or E circuits of the throttle position sensor.

P2138 OBD-II Trouble Code: Throttle/Pedal Position Sensor ...

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this video may explain what you need to know : https://www.youtube.com/watch?v=FJobCD6y8fk This next video may also give you some answers. https://www.youtube.com/watch?v=IagzHYB3GHo

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

DTC P2138 - TPS/Pedal Position Sensor/Switch D/E Voltage Correlation

Check wires and harnesses connections first, then its possible that the sensor go to bad.

Keep us updated.

P2138 is Throttle Pedal Position Sensor/ Switch D / E Voltage Correlation. Replace the Throttle Pedal Position Sensor/Switch.Remember to have the set code Cleared from the cars computer, this will turn off the check engine light and reset it. Good Luck and have a good XMASS.

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.

There is a GM service bulletin on this particular item. basically covers both codes your getting.
#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)

i have a 2004 acura tl an is giveing me code p2138