Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer is having trouble talking to one of the oxygen sensors in the engine. It's like when a walkie-talkie loses signal and you can't hear the other person.
The P2629 code is triggered when the Engine Control Module (ECM) detects an open or malfunction in the circuit that controls the oxygen sensor's pumping current trim for Bank 2 Sensor 1.
The oxygen sensor's pumping current trim circuit is responsible for adjusting the amount of current sent to the sensor to maintain optimal air-fuel mixture. An open circuit or fault in this system can cause incorrect readings, affecting engine performance.
• Check Engine Light illuminated
• Poor fuel economy
• Rough engine idle
• Faulty oxygen sensor
• Damaged wiring or connectors
• Faulty Engine Control Module (ECM)
ECM: Engine Control Module, the computer that controls engine functions.
Oxygen Sensor: A device that measures the amount of oxygen in the exhaust gases.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage.
• Test the oxygen sensor for proper operation.
• Replace the faulty oxygen sensor.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Socket set
$150 - $400
Moderate
• Toyota Camry
• Honda Accord
• Ford F-150
• Regular maintenance checks
• Ensure proper connections and wiring
• Use high-quality fuel
Sensor Issue
• Get the car checked by a professional if the Check Engine Light is on.
• Avoid driving long distances until the issue is fixed.
Oxygen sensors may be covered under the vehicle's emissions warranty.
This code has been associated with issues in cars with high mileage or those that have not had regular maintenance.
Moderate – It's important to address this issue soon to prevent further engine performance problems.
Driving with a malfunctioning oxygen sensor can lead to increased emissions and may not comply with local emissions regulations.
• Engine at operating temperature
• Vehicle running at idle
Bank 2 Sensor 1 is located on the exhaust manifold of the engine on the side with cylinder 2.
Q: Can I drive with a P2629 code?
A: It's possible to drive short distances, but it's best to get it fixed soon to avoid further issues.
Q: How do I know if my oxygen sensor is bad?
A: Symptoms include poor fuel economy, rough idle, and the Check Engine Light being on.
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Universal · Digital multimeter
A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.
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.
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.