Skip the auto shop - Our mechanics make house calls

Q: Codes P0121, P0221, P2101, P2104, P2110, P2111

asked by on

P0121, P0221, P2101, P2104, P2110, P2111 These are the codes thrown. Car runs on two cylinders. I've tried replacing ECU, it runs the same and throws a couple different codes. No throttle control at all. New throttle body, new position sensor and new motor. Checked continuity from sensors to ECU and all are present.

My car has 91500 miles.
My car has a manual transmission.

A: Here are the codes, what they mean and the ...

Here are the codes, what they mean and the potential causes below each of them. Note that some of them may be related and can cause additional codes to be triggered that may be fixed when one of it's related codes are corrected for.

P0121 - faulty throttle position sensor

P0221 - Also related to throttle position sensor

P2101 - Throttle actuator control motor

P2104 - Throttle actuator control system - Forced idle

P2110 - This relates to a damaged or faulty PCM (main computer)

P2111 - This is related to P2101

I would recommend having an expert from YourMechanic come to your home to confirm a diagnosis on the issue and make the necessary repairs or replacements.

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・Save up to 30%

Get a quote

What others are asking

Q: Engine misfire cylinder 3

The misfire could very possibly be from low compression. You want the compression across all cylinders to be within 10% of each other at most. The compression for number 3 is under that threshold. It could be caused by worn...

Q: Throttle Sensor

Hi, thanks for writing in. The throttle is controlled by an electronic throttle control and the vehicle will most likely be in a fail safe mode that will not allow throttle control. I would recommend having an expert from YourMechanic...

Q: my truck stalled yesterday and i received an engine code of p2110 now it wont start turns over but not getting gas

This P2110 code relates to the electronic throttle control which can be potentially caused by the following: Faulty Electronic Throttle Control (ETC) Electronic Throttle Control (ETC) harness is open or shorted Electronic Throttle Control (ETC) circuit having poor electrical...

Related articles

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...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
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...