What Does P013D Mean?
The ECM has determined that the Bank 2 Sensor 2 (downstream) oxygen sensor is responding too slowly during the lean-to-rich transition. This is the bank 2 counterpart of P013B. When exhaust gas shifts from a lean to rich condition, the sensor on the outlet side of the bank 2 catalytic converter takes too long to register the change, suggesting the sensor's detection capability for increasing fuel content in the exhaust is impaired.
Common Causes
40%
Aging Bank 2 downstream O2 sensor with degraded lean-to-rich response time
20%
Contamination on O2 sensor from fuel additives, leaded fuel, or aftermarket additives
15%
Exhaust leak upstream of the bank 2 downstream sensor diluting rich exhaust pulses
15%
Degraded bank 2 catalytic converter affecting downstream sensor readings
10%
Wiring degradation or high resistance in bank 2 downstream O2 sensor circuit
Diagnostic Steps
1
Using a graphing tool, monitor Bank 2 Sensor 2 during a snap throttle acceleration event. Measure the time for voltage to rise from below 0.45V to above 0.45V — should be within 100-150ms.
2
Compare Bank 2 Sensor 2 lean-to-rich response to Bank 1 Sensor 2. A significant difference suggests a bank-specific issue.
3
Check for exhaust leaks in the bank 2 exhaust system between the engine and the downstream O2 sensor. Use smoke testing or visual/audible inspection.
4
Inspect the O2 sensor connector for moisture, corrosion, or damaged pins. Measure signal wire resistance from sensor to ECM.
5
If the sensor has over 80,000 miles and shows degraded response in either direction, replacement is the most cost-effective repair.
Estimated Repair Cost
$100 - $350
Parts + labor, varies by vehicle and location
The ECM has determined that the Bank 2 Sensor 2 (downstream) oxygen sensor is responding too slowly during the lean-to-rich transition. This is the bank 2 counterpart of P013B. When exhaust gas shifts from a lean to rich condition, the sensor on the outlet side of the bank 2 catalytic converter take...
The most common cause of P013D (O2 Sensor Slow Response - Lean to Rich (Bank 2 Sensor 2)) is: Aging Bank 2 downstream O2 sensor with degraded lean-to-rich response time
Typical repair costs for P013D range from $100 to $350, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to drive. No driveability or safety concerns. This code affects emissions monitoring accuracy on bank 2 and will cause an emissions test failure.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P013D to identify the root cause.
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Quick Info
Category
Powertrain
System
Emissions / Exhaust
Difficulty
Type
Generic (SAE)
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