P0060 CHEVROLET Code - HO2S Heater Resistance Bank 2 Sensor 2
Engine-Codes - Chevrolet - P0060 CHEVROLET
Repair Importance Level: 3/3
Repair Difficulty Level: 3/3 What is this?
What does this mean?
|P0060 CHEVROLET code possible causes
- Faulty Heated Oxygen Sensor (HO2S) Bank 2 Sensor 2
- Heated Oxygen Sensor Bank 2 Sensor 2 harness is open or shorted
- Heated Oxygen Sensor Bank 2 Sensor 2 circuit poor electrical connection
- Faulty Powertrain Control Module (PCM)
|How is the P0060 CHEVROLET code repair?Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.
|What is the cost to diagnose the P0060 CHEVROLET code
Labor: 1.0The cost to diagnose the P0060 CHEVROLET code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.
|What are P0060 CHEVROLET code possible symptoms?
- Engine Light ON (or Service Engine Soon Warning Light)
|What is P0060 CHEVROLET code meaning?The heated oxygen sensor (HO2S) must reach the operating temperature to provide an accurate voltage signal. A heating element inside the HO2S minimizes the time required for the sensor to reach operating temperature. Voltage is provided to the heater by the ignition 3 voltage circuit through a fuse. With the engine running, the ground is provided to the heater by the HO2S heater low control circuit, through a low side driver within the Powertrain Control Module (PCM). The PCMcommands the heater ON or OFF to maintain a specific HO2S operating temperature range. The PCMdetermines the temperature by measuring the current flow through the heater. When the heater is in the ON state, the PCMwill pulse the heater OFF for a duration of 50 ms, once per second. The PCMcalculates the heater resistance on a cold start. This diagnostic will only run once per ignition cycle.
|Need more information with the P0060 CHEVROLET code?Need more information on how to fix the P0060 CHEVROLET code?
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|Trouble Code||Fault Location||Probable Cause|
|P0060||Heated oxygen sensor (HO2S), bank 2, sensor 2 -heater resistance||Wiring, HO2S|
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What Does Code P0060 Mean?
OBD II fault code P0060 is defined as “Heated Oxygen Sensor Resistance (Bank 2 Sensor 2)”, and is set when the PCM (Powertrain Control Module) detects an electrical resistance in the sensor control circuit that falls outside of predefined parameters. On engines with two cylinder heads, “Bank 2” refers to the bank of cylinders that does not contain cylinder #1, while “Sensor 2” refers to the oxygen sensor that is located downstream of the catalytic converter.
Code P0060 indicates a problem with the electrical resistance of the control circuit, and while high or low resistance issues can occur in the control circuit wiring and even the PCM, it is more likely that the issue involves the internal resistance of the actual oxygen sensor itself, rather than the control circuit or the PCM. Typically, the resistance in this circuit will be 8 Ohms (or very close to it), and a variation of around 10% to either side of this value will set code P0060 and illuminate the CHECK ENGINE light.
Oxygen sensors play a critical role in the calculation of fuel delivery, ignition-, and valve timing strategies by comparing the amount of oxygen in the exhaust stream (before it enters the catalytic converter) with the oxygen content of the ambient atmosphere. As the oxygen content of the exhaust stream changes continually during normal engine operation, the oxygen sensor uses the varying oxygen content of the exhaust gas to generate signal voltages that vary from about 100 millivolts to around 900 millivolts.
The resulting signal voltages are used by the PCM to command changes in fuel trim, ignition timing, as well as valve timing on engines where VVT or VCS timing systems are fitted. A properly functioning oxygen sensor that is at its proper operating temperature (about3500C) reacts to variations in the oxygen content of the exhaust gas almost immediately, thus ensuring that the PCM is always able to manage the engine efficiently, regardless of the engine load or speed.
NOTE#1: While the resistance value of 8 Ohms stated here is valid for the majority of applications that use conventional oxygen sensors, the manual for the application being worked on should always be consulted for the exact values for that application.
NOTE #2: Some Japanese vehicles, such as Toyota, use AIR/FUEL RATIO sensors that are NOT interchangeable with conventional oxygen sensors. Consult the relevant manual for the correct diagnostic, testing, and repair information for these applications.
The image below shows the typical construction of a heated oxygen sensor. Note the location of the heater element, which requires a specific electrical resistance to warm up to several hundred degrees before the sensor will start to generate a signal voltage.
What are the common causes of code P0060 ?
Assuming there are no other issues present that could influence the proper operation of an oxygen sensor, there are not very many causes of code P0060, but chief among them are the following-
- Heat-damaged wiring and connectors.
- Wiring and connectors that are damaged by impacts with road debris.
- Defective oxygen sensors.
- Failed, or failing PCM. Note that although this is not altogether impossible, it is a rare event and the fault must be sought elsewhere before any controller is replaced.
What are the symptoms of code P0060 ?
In some cases there may be no discernable symptoms present apart from a stored trouble code and an illuminated CHECK ENGINE warning light. However, some symptoms can be severe and one or more may vary in severity between applications. Typical symptoms may include the following-
- Increased fuel consumption that can vary from slight, to dramatic.
- Loss of engine power.
- Visible black smoke from the tail pipe.
- Oil dilution caused by over fuelling over extended periods.
- Hard starting may be present in some cases.
- Rough idling may be present in some cases.
- Reduced spark plug life due to carbon deposit buildup.
How do you troubleshoot code P0060 ?
NOTE #1: Bear in mind that the oxygen sensor itself forms part of the control circuit, which is why it must be tested along with the wiring when resistance tests are carried out.
NOTE #2: Diagnosing code P0060 requires that the engine be in perfect running order, with no misfiring, rich-, or lean running conditions, or vacuum and exhaust leaks present that could influence the proper working of any oxygen sensor. If there are other codes present along with P0060, these codes must be resolved before starting a diagnostic procedure for code P0060.
Record all stored fault codes, along with all available freeze frame data. This information could be very helpful if an intermittent fault is diagnosed later on.
Perform a thorough visual inspection of all wiring associated with the affected sensor. Consult the manual to determine the function, color-coding, location, and routing of all wires in the circuit, and look for shorted, burnt, damaged, or broken wiring and connectors. Pay particular attention to the routing of the wiring, since unsecured and misrouted wiring can easily burn against hot exhaust components.
Repair wiring and/or connectors as required, but be sure to route all wiring as far away from the exhaust system as possible.
If no visible damage to the wiring is found, perform continuity, resistance, ground, and reference voltage checks on all associated wiring. Consult the manual on the exact values required for the application being worked on, but be sure to disconnect the sensor from the PCM before starting continuity checks to prevent damage to the controller.
Since code P0060 indicates a resistance issue, pay particular attention to the resistance values. If the circuit is fused, check the resistance in both the reference voltage and signal voltage wires; replace the wiring if obtained values do not fall within the manufacturer’s specifications.
If the circuit is not fused, the PCM is supplying the reference voltage (and sometimes the ground as well) so consult the manual on the relevant pin number and location in the PCM connector. Check for continuity and resistance from this pin to the corresponding pin in the connector on the end of the wiring harness. Compare obtained readings with those stated in the manual, and replace the affected wiring if obtained values differ from those stated in the manual.
At this point it also a good idea to confirm that the oxygen sensor reference voltage is the same as the battery voltage, i.e., 12.6V to 13.8V to eliminate battery and charging system issues as the cause of long warm-up times of oxygen sensor heater elements. Low input voltages may not always cause code P0060, but it is easy to misinterpret long warm-up times as resistance issues.
NOTE: Avoid repairing wiring, since poorly executed repairs could cause high resistance and continuity issues later on. The better option is always to replace wiring, as opposed to repairing it.
If all electrical values fall within manufacturer’s specifications, or after repairs had been made, clear all codes and test the system again to see if the code returns. If it does return, it is almost certain that the sensor itself is defective.
Remove the affected sensor from the exhaust system, and test its resistance. Note that the manual will state the exact resistance value, and the obtained reading must match this value exactly. Close enough is not good enough; oxygen sensors require a specific resistance to work properly, so replace the sensor if there is any doubt about its internal resistance.
NOTE: Resist the temptation to replace the sensor with a cheap aftermarket part. These parts almost never conform to OEM specifications, meaning that not using OEM replacement sensors could cause a speedy recurrence of the problem.
If the sensor is replaced, clear all codes still present, and test drive the vehicle with a suitable scanner connected to monitor the operation of the sensor in real time. Note that during normal operation, the signal voltage will never be static; after the PCM enters closed loop operation, it will change continually from around 100 millivolts to about 900 millivolts, depending on the engine load and speed.
However, assuming that no misfiring, vacuum, or exhaust issues are present, this fluctuation is dependent on both the resistance of the control circuit and the sensor itself, meaning that a persisting, or intermittent resistance issue could affect the signal voltage. Both high and low resistances could cause the heater element not to work properly, which will ultimately affect the signal voltages generated.
Note that intermittent problems can sometimes be extremely difficult to find and repair. In some cases, it may be necessary to allow the fault to worsen before an accurate diagnosis and definitive repair can be made.
Codes Related to P0060
- P0053 – Relates to “ Heated oxygen sensor Heater Resistance (Bank 1 Sensor 1)”
- P0054 – Relates to “ Heated oxygen sensor Heater Resistance (Bank 1 Sensor 2)”
- P0055 – Relates to “Heated Oxygen Sensor Heater Resistance(Bank 1 Sensor 3)”
- P0059 – Relates to “ Heated oxygen sensor Heater Resistance (Bank 2 Sensor 1)”
- P0060 – Relates to “ Heated oxygen sensor Heater Resistance (Bank 2 Sensor 2)”
- P0061 – Relates to “Heated Oxygen Sensor Heater Resistance(Bank 2 Sensor 3)”
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P0060 OBD-II Trouble Code: HO2S Heater Resistance (Bank 2 Sensor 2)
P0060 trouble code definition
P0060 indicates that there is an abnormal (usually high) resistance detected in the heater of the oxygen sensor, located after the catalytic convertor
What the P0060 code means
P0060 indicates that there is a malfunction in the oxygen sensor located after the catalytic convertor. The oxygen sensor is used to regulate the performance of the engine, such as fuel consumption. However the O2 sensor can only accurately regulate the engine performance after the sensor has reached a hot temperature. An engine will usually take about 15 minutes of running to heat the oxygen sensor up to its required hot temperature.
An accurate oxygen sensor reading is needed immediately after the engine is running. The internal heaters were built into the sensors to warm them up faster than the engine can alone. The computer of the vehicle will “know” the temperature of the oxygen sensor by monitoring the resistance of the oxygen sensor. If the resistance is out of range the computer will assume that the temperature of the oxygen sensor is unsatisfactory.
What causes the P0060 code?
Worn heater element in the oxygen sensor
Corrosion in the connections or electrical terminals
Shorted wiring of the oxygen sensor
What are the symptoms of the P0060 code?
Increased fuel consumption
Engine misfiring at idle
Check Engine Light illuminating
Engine runs poorly until it reaches operating temperature
How does a mechanic diagnose the P0060 code?
Removing the oxygen sensor from the exhaust but leaving the wiring connected to determine if the Sensor is heating on its own
Examining the connections and wiring related to the oxygen sensor
Measuring the resistance of the oxygen sensor and comparing it to manufacturers specifications
Common mistakes when diagnosing the P0060 code
Replacing the sensor without evaluating the wiring and electrical connections related to the sensor
Improperly distinguishing sensor 1 from sensor 2 and replacing the wrong sensor
How serious is the P0060 code?
The emissions system of the vehicle will monitor the emissions output through the readings of the oxygen sensor. The computer of the vehicle will make adjustments to the emissions output according to the oxygen sensor’s readings.
If the oxygen sensor is malfunctioning the vehicle will usually emit higher amounts of emissions which is worse for the environment. Also an increased emissions output will shorten the lifespan of the catalytic convertor.
What repairs can fix the P0060 code?
Usually a replacement of bank 2 oxygen sensor 2 will fix this particular code.
Additional comments for consideration regarding the P0060 code
Please ensure all of the oxygen sensor related connections and wiring are undamaged and in working order.
Need help with a P0060 code?
YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.
This article originally appeared on YourMechanic.com as P0060 OBD-II Trouble Code: HO2S Heater Resistance (Bank 2 Sensor 2).
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