A P0122 code means that the the car's computer has detected that the TPS (throttle position sensor) is reporting too low a voltage. On some vehicles that lower limit is 0.17 - 0.20 volts (V).
Did you adjust it when you installed it? If the signal value is less than .17V then the PCM sets this code. Could be an open or a short to ground in the signal circuit. Or you may have lost the 5Volt reference voltage.
Symptoms may include:
- Rough or low idle
- Stalling
- Surging
- No/little acceleration, other symptoms may also be present
A code P0122 may mean that one or more of the following has happened:
- TPS not mounted securely
- TPS circuit short to ground or another wire
- Faulty TPS
- Damaged computer (PCM)
Some recommended troubleshooting and repair steps are:
- Carefully check the throttle position sensor (TPS), wiring connector, and wiring for breaks, etc. Repair or replace as necessary
- Check the voltage at the TPS (refer to a service manual for your vehicle for specific information). If the voltage is too low that is indicative of a problem. Replace if necessary.
- If recently replaced the TPS may need to be adjusted. On some vehicles the installation instructions call for the TPS to be properly aligned or adjusted, consult a repair manual for specifics.
- If there are no symptoms at all, the problem may be intermittent and clearing the code may resolve the issue temporarily. If this is the case then you should definitely check the wiring to be sure it's not rubbing on anything, grounding, etc. The code may come back.
You've probably got a broken wire, or a bad connection at the plug. Un
plug the TPS (Throttle Position Sensor) and take a close look at the
spade terminals inside the plug. Look for signs of corrosion or loose
terminals. If you're careful you can use a very small pick to bent the
tabs out a bit (for a tighter connection) or scratch off the surface of
them if corrosion is present.
If all this looks good then
you'll need to use a voltmeter. First you need to make sure you have
proper tps adjustment. Touch one lead to #1 terminal on the TPS
connector (looking at the connector with the locking tab on top, it will
be on the left) and touch the other to a good ground source (battery
negative post, for example) On 10 or 20v DC scale, loosen the TPS
mounting screws and turn the sensor until you get a value of 0.50 volts.
If
this is good, touch one end to terminal #3 of the TPS connector (this
will be on the right side) and touch the other end to a good ground
source. You should get between 4.5v and 5.5v. If you don't you'll need
to trace the wire back looking for a break somewhere.
If this is
good put the voltmeter on OHMS (resistance) and touch one lead to
terminal #2 (center) and the other to a good ground... you should have
less than 10 ohms of resistance.
If this is good you've either got a broken wire going from the computer to terminal #1 (left), or a bad computer.
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SOURCE: Tps Sensor low input p-0227
P0227 also indicates the throttle PEDAL position switch control Circuit.Not only the throttle position sensor at the engine.
SOURCE: 1997 buick lasabre custom
It sounds like you have a vacuum leak or intake gaskets leaking. Try this. Start the engine and let it reach the idle it want to go to. Get you a can of Brake Clean and spray it around the intake manifold (it on the top center of the engine, you may have to removed a plastic cover) If the engine idle changes up or down then the intake gaskets are leaking hence your vacuum leak. I hope this will help you.
SOURCE: 1998 PONTIAC SUNFIRE ADVISE
Exhaust Gas Recirculation System Is the main problem here. the other code P0118 may be a bad temprature sensor or your thermostate needs to be changed. Last it could be a weak water pump.
So what is an EGR system and how does it work? EGR stands for Exhaust Gas Recirculation, and as its name implies, this system allows exhaust gasses from your car to be re-circulated into the engine, helping to reduce emissions. These systems are mostly comprised of the EGR valve, a DPFE (Delta Pressure Feedback EGR) sensor, hoses, a vacuum regulator, some vacuum lines, wiring, the computer and the exhaust tube leading to the valve itself.
The car's wiring can be tested in the normal fashion by looking for broken and lose wire, and all vacuum lines can be checked easily for cracks, leaks and correct routing.
The last thing i would then check is the the EGR valve, EGR vacuum regulator and DPFE sensor (or similar flow sensor).
I hope this helps and good luck
SOURCE: 2002 Interpid 2.7 L died on road now no start!
sounds like a bad ecm aka computer to me.have ecm checked
SOURCE: 2000 Audi a4 qauttro Knock Sensor 2 Circuit Low
The knock sensors are mounted down low on either side of the engine block, and are not very easy to reeach/remove.
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97 impreza sport outback what's po122code from and how can I fix it
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