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2003 Chevrolet Monte Carlo LS 3.4L Poor Idle Quality, Hesitation
Posted to GM Driveability on 5/22/2013 19 Replies

This vehicle came in with a hesitation complaint. We noticed a collapsed vacuum line on the evap solenoid and that the ect was unplugged which account for the ect code. This vehicle will run great then all of a sudden the fuel trims go to -20 and it starts sur...

19 Replies Received (View Replies)

  Related Documents & Media  2003 Chevrolet Monte Carlo LS

 
Message Closed w/FIX

car Vehicle Data

2003 Chevrolet Monte Carlo LS

VIN 2G1WW12E43
Engine3.4 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Hesitation
OccursIntermittently

Trouble Codes

P0118Engine Coolant Temperature Sensor Circuit High Voltage
P0420Catalyst Efficiency Below Threshold (Bank 1)
P16355-Volt Reference 'A' Circuit Malfunction
Message Closed w/FIX

car Vehicle Data

2003 Chevrolet Monte Carlo LS

VIN 2G1WW12E43
Engine3.4 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Hesitation
OccursIntermittently

Trouble Codes

P0118Engine Coolant Temperature Sensor Circuit High Voltage
P0420Catalyst Efficiency Below Threshold (Bank 1)
P16355-Volt Reference 'A' Circuit Malfunction