P1152 Lincoln Code - Lack of Upstream Heated Oxygen Sensor Switch Sensor Indicates Rich Bank 2
Quick Answer
The Heated Oxygen Sensor (HO2S) Monitor is an on-board strategy designed to monitor the HO2S sensors for a malfunction or deterioration that can affect emissions. Common causes include Faulty Upstream Oxygen Sensor Bank 2, Fuel pressure high or low, MAF sensor dirty/defective. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P1152 Lincoln indicates Lack of Upstream Heated Oxygen Sensor Switch Sensor Indicates Rich Bank 2.
- Common causes
- Common causes include Faulty Upstream Oxygen Sensor Bank 2, Fuel pressure high or low, MAF sensor dirty/defective.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P1152 Lincoln Description
• The HO2S sensor senses the oxygen content in the exhaust flow and outputs a voltage between zero and 1.0 volt. Lean of stoichiometric (air/fuel ratio of approximately 14.7:1 for gasoline engines), the HO2S will generate a voltage between zero and 0.45 volt. Rich of stoichiometric, the HO2S will generate a voltage between 0.45 and 1.0 volt.
• The HO2S Monitor evaluates both the upstream (Fuel Control) and downstream (Catalyst Monitor) HO2S for proper function.
• Once the HO2S Monitor is enabled, the upstream HO2S signal voltage amplitude and response frequency are checked. Excessive voltage is determined by comparing the HO2S signal voltage to a maximum calibratable threshold voltage.
• A fixed frequency closed loop fuel control routine is executed and the upstream HO2S voltage amplitude and output response frequency are observed. A sample of the upstream HO2S signal is evaluated to determine if the sensor is capable of switching or has a slow response rate.
• An HO2S heater circuit fault is determined by turning the heater on and off and looking for a corresponding change in the OSM and by
measuring the current going through the heater circuit.
• The MIL is activated after a fault is detected on two consecutive OBD II drive cycles.
What are the Possible Causes of the DTC P1152 Lincoln?
- Faulty Upstream Oxygen Sensor Bank 2
- Fuel pressure high or low
- MAF sensor dirty/defective
- Vacuum leak on engine
- Leaking fuel injector or fuel pressure regulator
- Faulty Powertrain Control Module (PCM)
How to Fix the DTC P1152 Lincoln?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1152 Lincoln code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P1152 Lincoln Code
1. What does the OBD-II code P1152 mean on a Lincoln vehicle?
P1152 indicates that the upstream heated oxygen sensor (HO2S) on Bank 2 is detecting a rich air-fuel mixture for an extended period.
2. What are the common symptoms of code P1152 on a Lincoln?
Symptoms may include poor fuel economy, rough engine idle, reduced engine performance, and the Check Engine Light turning on.
3. What causes the P1152 code on a Lincoln?
Possible causes include a faulty upstream oxygen sensor, fuel injector issues, a vacuum leak, a malfunctioning mass airflow (MAF) sensor, or excessive fuel pressure.
4. Can a bad oxygen sensor trigger the P1152 code?
Yes, a failing or dirty upstream oxygen sensor can cause the P1152 code by providing inaccurate readings to the engine control module.
5. How do I fix the P1152 code on a Lincoln?
Repairs may involve replacing the upstream oxygen sensor on Bank 2, inspecting and cleaning the MAF sensor, checking fuel injectors for leaks, or addressing any vacuum leaks.
6. How can I diagnose the P1152 code on a Lincoln?
Use an OBD-II scanner to confirm the code, inspect the upstream oxygen sensor and wiring, check fuel trim data, and perform a smoke test to detect vacuum leaks.
7. Is it safe to drive with the P1152 code on a Lincoln?
Driving with the P1152 code is not recommended as it can lead to poor engine performance, reduced fuel efficiency, and potential damage to the catalytic converter.
8. What does "Bank 2" mean in the P1152 code?
Bank 2 refers to the side of the engine opposite Bank 1, typically the side without cylinder 1 in a V-type engine configuration.
9. Can a dirty MAF sensor cause the P1152 code?
Yes, a dirty or malfunctioning MAF sensor can cause incorrect air-fuel mixture readings, contributing to the P1152 code.
10. How much does it cost to repair the P1152 code on a Lincoln?
Repair costs can vary depending on the issue, but replacing an oxygen sensor typically costs $150-$300, while cleaning or replacing a MAF sensor may cost $100-$250.
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