Land Rover DTC P1172 – Oxygen Sensor System Too Rich Fault Banks A & B
DTC P1172 meaning on Land Rover
DTC P1172 on a Land Rover indicates an Oxygen Sensor System Too Rich Fault for Banks A & B. This fault code is triggered when the Engine Control Module (ECM) detects that the air-fuel mixture is too rich in both Bank A and Bank B of the engine.
Land Rover DTC P1172 symptoms
Symptoms of DTC P1172 on a Land Rover may include:
- Check Engine Light illuminated
- Decreased fuel efficiency
- Engine running rough or misfiring
- Black smoke from the exhaust
Land Rover DTC P1172 causes
Common causes of DTC P1172 on a Land Rover include:
- Faulty oxygen sensor
- Vacuum leaks in the intake system
- Fuel pressure regulator issues
- Dirty or clogged fuel injectors
Land Rover DTC P1172 seriousness
DTC P1172 should be addressed promptly as running too rich can lead to increased fuel consumption, potential damage to the catalytic converter, and poor engine performance.
How to diagnose DTC P1172 on Land Rover
To diagnose DTC P1172 on a Land Rover, a mechanic may perform the following steps:
- Use a scan tool to read the fault codes and determine if P1172 is present
- Inspect the oxygen sensors for proper operation
- Check for vacuum leaks in the intake system
- Test the fuel pressure regulator
- Clean or replace clogged fuel injectors
How to fix DTC P1172 on Land Rover
To fix DTC P1172 on a Land Rover, the following steps may be taken:
- Replace faulty oxygen sensors
- Repair any vacuum leaks in the intake system
- Replace a malfunctioning fuel pressure regulator
- Clean or replace clogged fuel injectors
How to erase DTC P1172 on Land Rover
To erase DTC P1172 on a Land Rover, the fault codes can be cleared using a scan tool. After addressing the underlying issue causing the fault code, clearing the codes will reset the Check Engine Light.
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