Skip the auto shop - Our mechanics make house calls

Q: P2101 TAC motor circuit range/performance

asked by on

"Car driven by my wife." tells me the car does not want accelerate but when I drive it nothing happens Auto Zone ran a diagnostics check and it gives P2101 P0223 P0123 P2135 twice and a P0420 and that is all. Please help me. Thank you Rene

My car has 151000 miles.
My car has an automatic transmission.

Hey there, thanks for writing in about your 2006 Nissan Altima.

P2101 is an OBD-II generic code for the engine control module (ECM) detecting the throttle actuator control (TAC) went out of the range of the circuit causing an open circuit to be detected in the TAC motor.

P0222 code is an indication that the Engine Control Module (ECM) has detected voltage from the throttle position sensor to have exceeded the acceptable range of voltage set by the manufacturer.

P0123 code means that the the car’s computer has detected that the TPS (throttle position sensor) is reporting too high a voltage.

P2135 throttle/pedal position sensor/switch A/B voltage correlation refers to a problem related to the throttle’s ability to open and close.

P0420 code, this could be caused by a number of different things. Mainly it will indicate that the reading of the rear O2 sensor is very similar to the front O2 sensor. This could be due to a bad O2 sensor (front or rear), faulty wiring to those sensors, or worse, a bad catalytic converter or ECM.

With all of this being said, I believe you need a new TPS and ECM. The last code says either ECM or O2 Sensor but I believe it is linked to the other codes.

To avoid any unnecessary repairs, consider YourMechanic, as one of our mobile technicians can come to your home to diagnose these trouble codes firsthand and make the accurate repair to get your car running normally.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: i have this code for my 2008 nissan sentra po725 readng the symptoms i have none car runs perfect in fact like about 9 months ago

I am unable to tell you exactly what is going on with your vehicle without more information, but I can give you the information I have available on the diagnostic trouble codes (DTC's) that you have listed. The P0725 relates...

Q: Flashing Check Engine Light is on. The engine shakes at idle and has low power.

Hi, the first task is to extract the problem codes which are causing the Check Engine light to flash. Most auto parts stores will do this for free. I would suspect plug wires next, and check the condition of the...

Q: Nissan 08 Altima won't start up when I press on the brake and push the start button.

Hi there. It sounds like the brake switch on the brake pedal is not working. There are two circuits on the brake switch, one for the brake lights and the other for the starter circuit. Some vehicles require the brakes...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...