Replaced throttle body and didn't solve problem
SOURCE: my chevy s10 failed emissions
Have your cat. converter checked out. I just had one of these for the same reason in my shop today.
SOURCE: 2006 Chevy Cobalt engine is shaking real bad and car has no power
I WOULD TRY AND RUN A BOTTLE OF SEA FOAM THOUGH IT BEFORE REPLACING PARTS. YOU CAN GET SEA FOAM AT ANY AUTO PARTS STORE FOR ABOUT $9.00 A CAN.
SOURCE: idle at 1500 to 2000 rpm
Most likely the throttle body gasket (between the throttle body and the intake manifold) is leaking.
SOURCE: check engine lite is on,
Your CODE P1276 refer to the Acelerator Pedal Position, Sensor 1 Circuit Range Performance.
Probable cause: Wiring, APP or ECM
GM - P1271 Accelerator Pedal Position Sensor 1-2 Correlation
I also found this... though its for Trailblazers... but may give you a clue:
Reduced Engine Power Message and/or Check Engine Light with any
Combination of the following DTCs: P0107 P0112 P0122 P0452 P1120 P1220
P1221 P1271 P1275 P1280 P1481 P1515 P1540 P1633 P1635 P1639 P1682
#PIP3192 - (Oct 18, 2004)
Reduced Engine Power Message and/or Check Engine Light with any
Combination of the Following DTCs: P0107 P0112 P0122 P0452 P1120 P1220
P1221 P1271 P1275 P1280 P1481 P1515 P1540 P1633 P1635 P1639 P1682 PCM
Repeat.
The following diagnosis might be helpful if the vehicle exhibits the symptom described in the PI.
Condition/Concern:
Reduced engine power message and/or check engine light with any
combination of the following DTCs: P0107 P0112 P0122 P0452 P1120 P1220
P1221 P1271 P1275 P1280 P1481 P1515 P1540 P1633 P1635 P1639 P1682
Recommendation/Instructions:
If the SI diagnostics did not isolate a concern, the following information may be helpful:
- Inspect the main engine wiring harness between the PCM and the
generator assembly for a potential short to ground. There is a metal
wiring harness retainer in this area that secures the main engine
harness. If the harness conduit is mispositioned, some of the wiring
may become exposed and chaff on the harness retainer. This may
eventually cause the exposed circuit to short to ground.
- Inspect the 3 harnesses that connect to the PCM for potential shorts to
ground on the metal PCM mounting bracket, just below the PCM. There are
plastic harness retainers on the PCM bracket that secure the harnesses
to the PCM bracket. If the harness conduit is mispositioned, some of
the wiring may become exposed and chaff on the PCM bracket. This may
eventually cause the exposed circuit to short to ground.
- If a chaffed circuit is found in either of the above locations, repair
the circuit using the necessary SI procedures. Once the circuit is
repaired, tape the area of the affected area of the harness to prevent
the wires from becoming exposed in the future and secure the harness
using the original harness retainer.
This applies to 04:
- 4.2L 5.3L LL8 LM4 Engine with DTC - P2120 or P2122 or P2123 or P2125 or
P2127 or P2128 - kw low MIL pedal power reduced #PI01746 - (Feb 17,
2004)
- 4.2L 5.3L LL8 LM4 Engine with DTC - P2120 or P2122 or P2123 or P2125 or P2127 or P2128.
When servicing the vehicle with the VIN you entered, the following
diagnosis might be helpful if the vehicle exhibits the described symptoms.
Condition/Concern:
MIL light on. Reduced Power message on DIC. Possibles DTCs P2120 and/or P2122, P2123, P2127, and P2128.
Recommendation/Instructions:
The APP harness is clipped to the accelerator pedal bracket. The
harness may chaff on the upper portion of the accelerator pedal causing
a short to ground. Verify the harness is not chaffing on the
accelerator pedal. After repairing the short, reposition the harness to
ensure no contact between the harness and the accelerator pedal.
Hope helpes.
SOURCE: Just replaced throttle body on 2006 Aveo. Engine
Hello angel 003801, if the car was running rough, and had acceleration issues before you changed the throddle body, I strongly recommend you get a new air filter. Many people are unaware that the air filter is like lungs to your engine, your engine needs a good mix of fuel and air to perform at it's peak. Also, most 10 minute oil change companies do not change the air filter, at best, some of them may take it out, hit it against something to clean some of the dirt out, and then put it back in.
If the engine seems to run better after putting in the throttle body I would still change the air filter if you haven't done that in a while. Also, make sure that the throttle body is mounted securely with no leaks, look around the area of the throttle body and make sure you didn't accidently knock of a vacuum hose, ( vacuum hoses are very small, usually black hoses, and there are several in the general area of the throttle body. If you should find a small hose that has one end that is not hooked to anything, look around for a small nipple that it may have come off of.
My goal was to provide timely and accurate information. If this has been helpful to you, please consider taking a second to click on the, " this was helpful ", button.
Thank you!
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