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.

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?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Codes P0121, P0221, P2101, P2104, P2110, P2111

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: My 2005.1 Audi S4 Avant starts when the engine is cold just fine, however when it's warmed up it won't start. Cranks won't catch

Hi there. When a car is hard to start when it is warmed up or hot, it's typically due to a fuel system issue; ranging from a mass air flow sensor that is faulty, clogged fuel injectors or a throttle...

Q: Problems putting in a spark plug in I had to thread the port for the plug now it won't stay in

You are supposed to thread the hole out and get all the material from cutting cleaned out of the hole and engine cylinder. After it is cleaned then you should clean the threads with brake cleaner that will dry quickly....

Q: Car not running after throttle body with IAC valve replacement

Hi, thanks for writing in. I would recommend retracing your steps. You are definitely on the right track. It sounds like you did a good amount of work to your car, and it is likely that something may been skipped...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
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...