Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's a problem with the car's oxygen sensor. It's like a wire got mixed up, causing the sensor to not work right.
The code indicates that the signal circuit of the oxygen sensor has been shorted to the heater circuit, affecting the sensor's performance.
P2235 is triggered when the Engine Control Module (ECM) detects that the signal circuit of the oxygen sensor on Bank 2 Sensor 2 is shorted to the heater circuit. This can cause incorrect readings and affect engine performance.
• Check Engine Light is on
• Poor fuel economy
• Rough engine idle
• Damaged oxygen sensor
• Wiring issues or shorts
• Faulty ECM
ECM: Engine Control Module
O2 Sensor: Oxygen Sensor
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage.
• Test the oxygen sensor for proper operation.
• Repair or replace damaged wiring.
• Replace the oxygen sensor if faulty.
• Reset the ECM and test drive the vehicle.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $300
Moderate
• Toyota Camry
• Honda Accord
• Ford F-150
• Regular maintenance checks
• Inspect wiring regularly
• Use quality fuel
Sensor Issue
• Address the issue promptly to avoid further damage.
• Consult a professional if unsure about repairs.
Check with your vehicle's manufacturer for warranty coverage on emissions-related components.
This code has been associated with vehicles that have high mileage or have been exposed to harsh conditions.
Moderate – Should be addressed soon to prevent further engine issues.
Driving with a malfunctioning oxygen sensor can lead to increased emissions, which may not comply with local regulations.
• Engine at normal operating temperature
• Vehicle in a safe, stationary position
The oxygen sensor is located on the exhaust system, downstream of the catalytic converter on Bank 2.
Q: What does Bank 2 Sensor 2 mean?
A: Bank 2 refers to the side of the engine opposite Bank 1, and Sensor 2 is the second sensor in the exhaust system.
Q: Can I drive with code P2235?
A: It's not recommended to drive for extended periods with this code as it can lead to increased emissions and engine performance issues.
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Universal · Digital multimeter
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Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.
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Universal · Wire connectors and repair kit
Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.
Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.
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Fitment Required · Vehicle-fitment part
Relevant when the code or supporting diagnostics point toward upstream or downstream oxygen-sensor faults.
This code family often involves upstream or downstream oxygen-sensor diagnosis.
Verify exact sensor position and vehicle fitment before buying.
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Fitment Required · Vehicle-fitment part
Relevant when catalyst-efficiency or emissions faults persist after proper diagnosis.
Catalyst-efficiency faults sometimes point toward converter problems after proper testing.
Catalytic converters are highly vehicle-specific and should not be purchased by code alone.
View options on AmazonThese parts may be related to this fault category, but a code by itself does not confirm exact fitment or guarantee that replacing a part will solve the problem.