P1157 2002 Ford F150 Code - Lack Of Heated Oxygen Sensor Switches Bank 2 Sensor 2 Indicates Lean
Quick Answer
The Heated Oxygen Sensor 2 (HO2S2) (Downstream), after the three-way catalyst (manifold), monitors the oxygen level in the exhaust gas on each bank. Common causes include Exhaust gas leaks, Faulty Heated Oxygen Sensor 2 (HO2S2) (Downstream) Bank 2, Heated Oxygen Sensor 2 Bank 2 harness is open or shorted. 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
- P1157 2002 Ford F150 indicates Lack Of Heated Oxygen Sensor Switches Bank 2 Sensor 2 Indicates Lean.
- Common causes
- Common causes include Exhaust gas leaks, Faulty Heated Oxygen Sensor 2 (HO2S2) (Downstream) Bank 2, Heated Oxygen Sensor 2 Bank 2 harness is open or shorted.
- 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 P1157 2002 Ford F150 Description
What are the Possible Causes of the DTC P1157 2002 Ford F150?
- Exhaust gas leaks
- Faulty Heated Oxygen Sensor 2 (HO2S2) (Downstream) Bank 2
- Heated Oxygen Sensor 2 Bank 2 harness is open or shorted
- Heated Oxygen Sensor 2 Bank 2 circuit poor electrical connection
- Inappropriate fuel pressure
- Faulty fuel injectors
How to Fix the DTC P1157 2002 Ford F150?
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 P1157 2002 Ford F150 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.
Need more information about the P1157 2002 Ford F150 code?
Need more information on how to fix the P1157 2002 Ford F150 code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P1157 2002 Ford F150 code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P1157 2002 Ford F150 Code
1. What are the common symptoms of OBDII code P1157 on a 2002 Ford F150?
The common symptoms of OBDII code P1157 on a 2002 Ford F150 include poor fuel economy, rough idling, and an illuminated check engine light.
2. What does the OBDII code P1157 "Lack Of Heated Oxygen Sensor Switches Bank 2 Sensor 2 Indicates Lean" mean?
This code indicates that the heated oxygen sensor located downstream of the catalytic converter on bank 2 sensor 2 is detecting a lean air-fuel mixture.
3. What are the possible causes of OBDII code P1157 on a 2002 Ford F150?
Possible causes of code P1157 on a 2002 Ford F150 include a faulty oxygen sensor, vacuum leaks, exhaust system leaks, or a malfunctioning fuel injector.
4. How can I diagnose the OBDII code P1157 on my 2002 Ford F150?
Diagnosing code P1157 involves checking the oxygen sensor's wiring, inspecting for any exhaust or vacuum leaks, and testing the fuel injector on bank 2 sensor 2.
5. How do I repair OBDII code P1157 on my 2002 Ford F150?
To repair code P1157, you may need to replace the oxygen sensor on bank 2 sensor 2, fix any exhaust or vacuum leaks, or address issues with the fuel injector causing the lean condition.
6. Can I continue driving my 2002 Ford F150 with OBDII code P1157?
It is not recommended to drive your vehicle with code P1157 present, as it can lead to decreased fuel efficiency and potential damage to the catalytic converter over time.
7. Will resetting the check engine light clear OBDII code P1157 on my 2002 Ford F150?
Resetting the check engine light may temporarily clear the code, but it will likely return if the underlying issue causing the lean condition is not addressed.
8. How much does it cost to repair OBDII code P1157 on a 2002 Ford F150?
The cost of repairing code P1157 can vary depending on the specific issue causing the lean condition, but it may range from a few hundred to a few thousand dollars.
9. How often does OBDII code P1157 occur in a 2002 Ford F150?
Code P1157 is not a common code in a 2002 Ford F150, but it can occur due to various factors affecting the air-fuel mixture on bank 2 sensor 2.
10. Is it possible to prevent OBDII code P1157 from appearing on my 2002 Ford F150?
Regular maintenance, including checking and replacing oxygen sensors as needed, can help prevent code P1157 from appearing on your 2002 Ford F150.
Discuss the causes and fixes for P1157 2002 Ford F150 OBDII Code
Code P1157 2002 Ford F150 comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
