Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
The car's computer is having trouble adjusting the fuel mixture for one side of the engine, which could affect how the engine runs.
The engine control module (ECM) is detecting that the fuel trim adaptation for Bank 2 is lower than expected, indicating a potential issue with the air-fuel mixture.
P1160 indicates that the ECM has detected the fuel trim adaptation additive value for Bank 2 is lower than the manufacturer's specified range. This typically means the ECM is unable to add enough fuel to maintain the desired air-fuel ratio, which can be caused by various factors such as vacuum leaks, fuel delivery issues, or sensor malfunctions.
• Check Engine Light is on
• Poor engine performance
• Increased fuel consumption
• Vacuum leak on Bank 2
• Faulty oxygen sensor on Bank 2
• Fuel injector issues on Bank 2
ECM: Engine Control Module
Fuel Trim: Adjustments made by the ECM to the air-fuel mixture.
• Use an OBD-II scanner to confirm the code.
• Inspect for vacuum leaks on Bank 2.
• Check the oxygen sensor readings on Bank 2.
• Repair any vacuum leaks found on Bank 2.
• Replace faulty oxygen sensor on Bank 2.
• Clean or replace fuel injectors on Bank 2.
• OBD-II scanner
• Vacuum gauge
• Multimeter
$100 - $500
Moderate
• BMW 3 Series
• Ford F-150
• Toyota Camry
• Regular maintenance of the fuel system.
• Routine checks for vacuum leaks.
• Timely replacement of oxygen sensors.
Engine Performance
• Avoid driving the vehicle extensively until the issue is resolved.
• Consult with a certified mechanic for a thorough diagnosis.
Check with your vehicle's manufacturer for warranty coverage on emissions-related components.
This code has been commonly reported in vehicles with higher mileage, often due to wear and tear on components like oxygen sensors and vacuum lines.
Moderate – While the vehicle may still be drivable, it can lead to poor fuel economy and potential engine damage if not addressed.
Ignoring this code may lead to increased emissions, which can be a violation of local environmental regulations.
• Engine at operating temperature
• Vehicle in closed-loop operation
Bank 2 refers to the side of the engine opposite to Bank 1, usually the side without cylinder 1, in a V-type engine.
Q: Can I drive with a P1160 code?
A: It's possible to drive, but it's not recommended as it can lead to further engine issues and increased fuel consumption.
Q: How do I know if my oxygen sensor is faulty?
A: A faulty oxygen sensor may cause poor fuel economy, rough idle, or the Check Engine Light to illuminate.
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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.