Auto Answers » View Question
bbacon

bbacon 2/10/2011

2004 Chevrolet Silverado 1500 LS 8 Cyl 5.3L

Engine

service engine light stays on

have hooked it up to scanner an reset it scanner shows heater circuit malfunction

4 Answers


Great Bear Auto Repair and Auto Body Shop

Hi there,
The engine light is related to the emissions of the car. When you scan it, you will get a code(s) that will assist to pinpoint the trouble with the emissions. Perhaps you are referring to the heated oxygen sensor code?
Audra
www.greatbearautoshop.com

Reply
0
J and K AUTOMOTIVE TOWING AND REPAIR

Oxygen O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 1)
This code refers to the front oxygen sensor on Bank 1. The heated circuit in the oxygen sensor decreases time needed to enter closed loop. As the O2 heater reaches operating temperature, the oxygen sensor responds by switching according to oxygen content of the exhaust surrounding it. The ECM tracks how long it takes for the oxygen sensor to begin switching. It the ECM determines (based on coolant temp) that too much time elapsed before the oxygen sensor began operating properly, it will set P0135.
Symptoms

You will likely notice poor fuel economy the illumination of the MIL.
Causes

A code P0135 may mean that one or more of the following has happened:

* O2 Heater element resistance is high
* Internal short or open in the heater element
* O2 heater circuit wiring high resistance
* open or short to ground in the wiring harness

Possible Solutions

* Repair short or open or high resistance in wiring harness or harness connectors
* Replace oxygen sensor (cannot repair open or short that occurs internally to sensor)

Reply
0
J and K AUTOMOTIVE TOWING AND REPAIR

O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 2)
What does that mean?

This code means that the heated circuit in the oxygen sensor on bank 1 decreases time needed to enter closed loop. As the O2 heater reaches operating temperature, the oxygen sensor responds by switching according to oxygen content of the exhaust surrounding it. The ECM tracks how long it takes for the oxygen sensor to begin switching. It the ECM determines (based on coolant temp) that too much time elapsed before the oxygen sensor began operating properly, it will set P0141. See also: P0135 (Bank 1, Sensor 1).
Symptoms

You will likely notice poor fuel economy the illumination of the Check Engine Light.
Causes

A code P0141 may mean that one or more of the following has happened:

* open or short to ground in the wiring harness
* O2 heater circuit wiring high resistance
* O2 heater element resistance is high
* Internal short or open in the heater element

Note: Typically a failed catalytic converter does not cause this code. You're more likely to see a P0420 code for a failed converter.
Possible Solutions

* Replace oxygen sensor (cannot repair open or short that occurs internally to sensor)
* Repair short or open or high resistance in wiring harness or harness connectors

Reply
0
J and K AUTOMOTIVE TOWING AND REPAIR

what were the fault code numbers did you get?

Reply
0

Answer this question

( characters left)

Follow Question

what's this?
advertisement
advertisement