Question about 2004 Chevrolet Silverado 1500 Crew Cab
a 6ya Mechanic can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
These trucks have a drive by wire system,we seen a` lot with a broken ground wire on the rear of the drverside cyl head,this is hard to see just feel and give the wire a tug .If the wire is loose or broken the reduced engine power light will come on.
Posted on Feb 15, 2009
SOURCE: 2004 chevy silverado
The above descriptions of the connector are very good. I washed the engine compartment yesterday, and immediately started getting the reduced enginer power code on the CIC, not performance. After reading several posts, I checked the connector on my 2003 2500HD, and found that the connector was not seated well and had gotten water in it. I cleared the water and the reconnected. The cables running from the fuse box to the connector are so short, the connector is in a bind and is pulled off-center. That is why the connector wasn't seated properly. The code went away, and the performance returned. By the way, be sure to do this after pulling the negative cable on your battery.
Posted on Apr 30, 2009
SOURCE: code p0121 TPS
THERE IS A TP SENSOR BUILT INTO THE THROTTLE ACTUATOR. THESE TRUCKS HAVE BEEN KNOWN FOR A FEW PROBLEMS IN THIS AREA. THROTTLE ACTUATOR IS NOT SERVICEABLE. THE THROTTLE BODY WILL NEED TO BE REPLACED IF IT IS PROVEN FAULTY. THE APP SENSORS ARE LOCATED IN THE GAS PEDAL MODULE. THESE SEND SIGNAL TO COMPUTER TO TELL IT WHERE YOUR FOOT IS, THEN COMPUTER SENDS COMMAND TO THROTTLE ACTUATOR TO OPEN OR CLOSE THROTTLE BASED ON THIS INPUT. THE SENSOR IN THE THROTTLE ACTUATOR DELIVERS A MESSAGE BACK TO THE COMPUTER TO TELL IT WHAT THE ACTUAL THROTTLE POSITION IS. IF THESE SIGNALS DONT MATCH(WHERE THROTTLE IS COMMANDED AND WHERE IT ACTUALLY IS)THE CHECK ENGINE LIGHT WILL ILLUMINATE AND THE VEHICLE COULD GO INTO A REDUCED POWER MODE. HOPE THIS HELPS YOU!
Posted on Sep 07, 2009
po455 is Probable Cause[s]
1. Defective, loose or missing fuel cap
2. EVAP canister broke, hose cracked or not connected
3. Purge or vent solenoid defective
4 . Vacuum leak at engine po121 code po121 means Throttle Position Sensor/Switch A Circuit Range/Performance Problem . it is usually indicative of a faulty throttle position sensor or faulty wiring harness in the engine bay.
Posted on Feb 27, 2010
Tips for a great answer:
Mar 19, 2017 | 2006 Chevrolet Silverado 1500 2WD
Dec 26, 2015 | 2004 Chevrolet Chevrolet Silverado 1500...
Jul 20, 2014 | 2003 Chevrolet Silverado 1500
Apr 23, 2014 | 1999 Chevrolet Silverado 1500
Feb 01, 2012 | Cars & Trucks
Feb 12, 2011 | Chevrolet Silverado 1500 Cars & Trucks
Dec 09, 2010 | 2000 Chevrolet Silverado
Aug 17, 2010 | 1999 Chevrolet Silverado 1500
Oct 31, 2009 | 2000 Chevrolet Silverado 1500
Dec 16, 2008 | 2007 Chevrolet Silverado 1500 2WD
Jul 09, 2014 | 2004 Chevrolet Silverado 1500 Crew Cab
44 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: