What Is Code P0060?
The P0060 diagnostic trouble code stands for “HO2S Heater Resistance Bank 2 Sensor 2.” This code is triggered when your vehicle’s onboard diagnostic system detects an abnormal resistance reading in the heater circuit of the downstream oxygen sensor located on Bank 2 of the engine (the side opposite the cylinder #1). Modern O2 sensors include an internal heating element that warms the sensor to operating temperature quickly, improving engine performance and emissions control. When the heater circuit develops excessive resistance or fails, the sensor cannot heat properly, and the PCM (Powertrain Control Module) sets this code.
What Does P0060 Mean?
The oxygen sensor heater circuit is designed to rapidly bring the O2 sensor to its optimal operating temperature (around 600–900°C). This allows the sensor to produce accurate voltage signals that help the engine computer adjust the air-fuel mixture in real time. The heater is powered by the vehicle’s electrical system and controlled by the PCM.
When the PCM detects that the heater circuit resistance is outside the expected range—either too high or too low—it sets code P0060. This typically means:
- The heater element inside the O2 sensor has failed or is degrading
- The wiring harness to the sensor is damaged, corroded, or loose
- The connector at the sensor is corroded or making poor contact
- An internal short or open circuit exists in the heater circuit
- The PCM itself may have a fault (rare)
Bank 2 refers to the side of the engine that does not contain cylinder #1. Sensor 2 is the downstream sensor, located after the catalytic converter. This sensor monitors exhaust gases after they’ve been processed by the catalytic converter to ensure the converter is working efficiently.
Common Symptoms
- Check Engine Light: The primary symptom; the MIL (Malfunction Indicator Lamp) will illuminate on the dashboard
- Poor Fuel Economy: The engine may run rich or lean due to inaccurate O2 sensor feedback
- Rough Idle: Engine may stumble or feel unstable at idle
- Reduced Engine Performance: Sluggish acceleration or loss of power
- Increased Emissions: Vehicle may fail an emissions test
- Hesitation Under Load: Engine hesitates when accelerating or climbing hills
- No Noticeable Symptoms: In some cases, the vehicle may run normally despite the code being set
Possible Causes (Ranked by Frequency)
1. Faulty O2 Sensor (Most Common)
The heater element inside the oxygen sensor degrades over time due to thermal cycling and exposure to exhaust gases. Most O2 sensors last 80,000–100,000 miles before requiring replacement. A failed heater element is the leading cause of P0060.
2. Corroded or Damaged Wiring Harness
The wiring that connects the O2 sensor to the PCM can become corroded, pinched, or damaged by heat and road debris. Corrosion on the wires increases resistance in the circuit, triggering the code.
3. Loose or Corroded Connector
The connector at the O2 sensor or at the PCM side can develop corrosion or poor contact due to moisture and salt exposure. A loose connection increases resistance and prevents proper heater operation.
4. Open or Short Circuit in the Heater Wire
A break in the heater wire or a short to ground can prevent current from flowing through the heater element, causing the resistance reading to be out of range.
5. PCM or Relay Malfunction (Rare)
In rare cases, the PCM itself or the relay controlling the O2 sensor heater circuit may be faulty. This is typically diagnosed only after other components have been ruled out.
6. Battery or Charging System Issues
Insufficient voltage from a weak battery or failing alternator can prevent the heater from operating properly, though this usually triggers additional codes.
Diagnostic Steps
Step 1: Scan for Additional Codes
Use an OBD-II scanner to read all diagnostic trouble codes. Additional codes related to O2 sensors (such as P0135, P0136, P0137, P0138, etc.) can help pinpoint the issue. Write down all codes before proceeding.
Step 2: Visual Inspection
Locate the Bank 2, Sensor 2 oxygen sensor (downstream sensor on the Bank 2 side of the engine, after the catalytic converter). Inspect the sensor and its wiring harness for:
- Visible damage, cracks, or burns on the sensor body
- Corroded or damaged wires
- Loose or corroded connectors
- Heat damage to the wiring insulation
Step 3: Check Connector and Wiring
Disconnect the O2 sensor connector and inspect both the male and female terminals for corrosion, bent pins, or loose contacts. Clean the connector with electrical contact cleaner if corrosion is present. Reconnect and clear the code to see if it returns.
Step 4: Measure Heater Circuit Resistance
Using a digital multimeter set to ohms (Ω), disconnect the O2 sensor connector and measure the resistance across the heater pins. Typical resistance should be between 2–14 ohms, depending on the vehicle manufacturer. If the reading is outside this range or shows infinite resistance (open circuit), the sensor heater is faulty.
Step 5: Check Heater Circuit Voltage
With the engine running and the connector still connected, use a voltmeter to measure the voltage supplied to the heater circuit. Most heater circuits receive 12 volts. If voltage is absent or significantly lower, check the wiring, fuses, and relays.
Step 6: Inspect Wiring Harness
Trace the wiring harness from the sensor to the PCM, looking for pinches, cuts, or areas of heat damage. Use a multimeter to check for continuity along the wire. An open circuit (no continuity) indicates a broken wire that needs repair or replacement.
Step 7: Replace the O2 Sensor
If the heater resistance is out of range and wiring is intact, the O2 sensor itself is faulty and must be replaced. Disconnect the sensor, remove it with an O2 sensor socket, and install a new OEM or quality aftermarket sensor. Torque to manufacturer specifications (typically 30–40 ft-lbs).
Step 8: Clear the Code and Test
After repairs, use the scanner to clear the P0060 code. Take the vehicle for a test drive to ensure the code does not return. If it does, further diagnosis may be needed.
Repair Cost Estimates
O2 Sensor Replacement
- Parts Cost: $40–$200 (OEM sensors typically $100–$200; aftermarket $40–$100)
- Labor Cost: $75–$150 (30 minutes to 1 hour of labor)
- Total Estimated Cost: $115–$350
Wiring Harness Repair or Replacement
- Parts Cost: $50–$150
- Labor Cost: $100–$300 (depending on harness routing and accessibility)
- Total Estimated Cost: $150–$450
Connector Repair or Replacement
- Parts Cost: $10–$50
- Labor Cost: $50–$100
- Total Estimated Cost: $60–$150
PCM Repair or Replacement (Rare)
- Parts Cost: $300–$1,000+
- Labor Cost: $200–$500
- Total Estimated Cost: $500–$1,500+
Note: Most P0060 issues are resolved with O2 sensor replacement, making it the most cost-effective repair in the majority of cases.
Can I Still Drive?
Severity: Moderate
Code P0060 is generally not an emergency, but it should be addressed soon. Here’s what you need to know:
- Safe to Drive: In most cases, you can continue driving with this code set, though fuel economy and performance may suffer
- Emissions: Your vehicle may fail an emissions inspection, and you may not be able to pass a smog test
- Engine Damage Risk: Low. The code does not typically cause immediate engine damage, but prolonged operation with a faulty O2 sensor can increase emissions and reduce fuel efficiency
- Catalytic Converter Risk: If the O2 sensor is not functioning properly, the engine may run too rich, which can damage the catalytic converter over time
- Recommended Action: Have the code diagnosed and repaired within a few days to a week to avoid potential damage to the catalytic converter and to restore fuel economy
Bottom Line: While you can drive with P0060, it’s best to schedule a repair appointment soon to prevent secondary damage and maintain optimal engine performance.
Frequently Asked Questions
Q: Can I drive with code P0060?
A: Yes, you can typically drive with P0060 set, but it’s not ideal. The vehicle may experience reduced fuel economy and performance. More importantly, a faulty downstream O2 sensor can allow the engine to run too rich, potentially damaging the catalytic converter over time. It’s best to have the code diagnosed and repaired within a week.
Q: What’s the difference between Bank 1 and Bank 2?
A: Bank 1 is the side of the engine that contains cylinder #1. Bank 2 is the opposite side. In a V6 or V8 engine, these are the two sides of the engine block. In an inline engine, Bank 1 is typically the front and Bank 2 is the rear. Sensor 1 is upstream (before the catalytic converter), and Sensor 2 is downstream (after the catalytic converter).
Q: How long do O2 sensors last?
A: Most O2 sensors last between 80,000 and 100,000 miles. However, they can fail earlier due to carbon buildup, contamination, or electrical issues. If your vehicle has high mileage and you’ve never replaced the O2 sensor, it may be time for preventive replacement.
Q: Will clearing the code fix the problem?
A: No. Clearing the code with a scanner will turn off the check engine light temporarily, but the underlying problem will remain. The code will return after a few driving cycles. You must diagnose and repair the actual cause—whether it’s a faulty sensor, damaged wiring, or corroded connector—to permanently resolve the issue.
Q: Can a bad battery cause code P0060?
A: Indirectly, yes. A weak battery or failing alternator may not supply sufficient voltage to the O2 sensor heater, preventing it from operating properly. However, this would typically trigger additional codes related to charging system voltage. Have your battery and alternator tested if you suspect a charging system issue.