When do I get a p0121 trouble code?

A general measurement is: at idle = .5 Volts; full throttle = 4.5 Volts. If the PCM detects that the throttle angle is greater or less than it should be for a specific RPM, it will set this code. Symptoms of a P0121 trouble code could include: Malfunction Indicator Lamp (MIL) illumination (Check Engine Light or Service Engine Soon light)

Why is my VW p0121 throttle position sensor not working?

The reason is because scan tools take samplings of many different readings over just one or two data lines and can miss an intermittent drop out. Hook up your oscilliscope and watch the signal. It should sweep up and down smoothly with no drop outs or spikes. 3. If no problems were noticed, perform a wiggle test.

Why does my check engine soon light come on?

I have a 2006 Buick Lucerne CXS with 120k miles. It has a V8 Northstar 4.6 engine. The check engine soon light came on about 2 weeks ago, took it to the dealership and they said it was a wiring harness running along my firewall that needed replaced. They did and the light was off.

How can I get my Check Engine light to go off?

One of the possible ways of getting your check engine light to go off is pulling off the engine control unit’s fuse and then putting it back again. Although this won’t solve the problem in newer cars, it may solve the problem in a little bit older cars, and it is easy to try. Check your repair manual to find the fuse to the engine control unit.

What to do if your check engine light says p0011?

Check to see if there are any other codes along with P0011 and clear your Check Engine Light with FIXD. Check the engine oil level and condition. If it’s low, adjust to spec and test drive to see if the concern is resolved. If it’s dirty, change the oil and filter and test drive to see if the concern is resolved.

What are the symptoms of the code p0011?

What Are The Symptoms Of Code P0011? 1 Check Engine Light 2 The hard start of the engine 3 Rough running engine 4 Stalling 5 Rattling/Knocking from engine 6 Decreased fuel economy 7 Failed emissions test

What does p0122 mean on a TPS sensor?

A P0122 code means that the the vehicle’s computer has detected that the TPS (throttle position sensor) “A” is reporting too low a voltage.

What does the p0171 code in front oxygen sensor mean?

If the P0171 is combined with the P0174 code, it’s very likely that the problem is caused by an intake leak. If there are no intake leaks, the next step is to replace the air filter and clean the air flow meter. If the problem persists the front oxygen (O2) sensor may need to be replaced.

What to do if check engine light code p0172 persists?

If check engine light code P0172 persists after you have inspected the air intake system and cleaned the Mass Air Flow (MAF) Sensor, perform a fuel pressure test. If any components in the fuel system are failing, replace them as necessary.

What does the p0121 code on an engine mean?

What the P0121 code means. P0121 is a generic OBD-II code which indicates that the Engine Control Module (ECM) has seen the TPS sensor circuit A learned output voltage go above or below the sensor’s expected range when compared to TPS sensor circuit B.

What does a p0122 code on a throttle position sensor mean?

A P0122 code means that the the vehicle’s computer has detected that the TPS (throttle position sensor) “A” is reporting too low a voltage. On some vehicles that lower limit is 0.17 – 0.20 volts (V). In simple terms, the throttle position sensor is used to determine what position the throttle is at. Did you adjust it…