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Home/Cars/Ram/1500/DT (2019-Present)/how to resolve a P0135 code in my Ram 1500 DT (2019-Present)?

how to resolve a P0135 code in my Ram 1500 DT (2019-Present)?

Ram 1500 DT (2019-Present)

Error Codes
Severity: mediumDifficulty: mediumError Code: P01351-2 hours
3 min read
492 words

Problem Statement

Learn how to diagnose and fix P0135 oxygen sensor heater circuit issues in Ram 1500 DT. Step-by-step guide with diagnostic procedures and repair instructions.

Error Code
P0135
Affected Component
Exhaust System
Estimated Time
1-2 hours

Safety Warnings

  • ⚠Disconnect the battery before working on electrical systems.
  • ⚠Allow the engine to cool before working near the exhaust components.

Symptoms

  • •Check engine light illuminated
  • •Poor fuel economy
  • •Rough idle
  • •Increased emissions
  • •Engine stalling or hesitation during acceleration

Diagnostic Steps

  1. 1Scan the vehicle’s onboard computer using an OBD-II scanner to confirm the P0135 code and check for any additional codes.
  2. 2Visually inspect the wiring and connector of the Bank 1 Sensor 1 oxygen sensor for any signs of damage, corrosion, or loose connections.
  3. 3Measure the resistance of the oxygen sensor heater element using a multimeter to ensure it is within specification.
  4. 4Check the fuse related to the oxygen sensor heater circuit in the fuse box.
  5. 5Test the voltage supply to the oxygen sensor heater circuit with the engine running to ensure proper voltage is present.
  6. 6Inspect the ECM for any issues or updates that may affect the oxygen sensor performance.

Solution

Solution

1. Preparation

  • Gather tools and parts required for the repair.
  • Disconnect the battery to prevent electrical shorts.
  • Tools Required: OBD-II scanner, multimeter, socket set, and torque wrench.

2. Inspect and Repair Wiring

  • If any damage or corrosion is found during the visual inspection, repair or replace the damaged wiring or connectors.
  • Use electrical contact cleaner to clean connectors and ensure a solid connection.

3. Replace Oxygen Sensor

  • Locate the Bank 1 Sensor 1 oxygen sensor (usually located before the catalytic converter).
  • Using a socket set, carefully remove the old oxygen sensor.
  • Apply anti-seize compound to the threads of the new oxygen sensor.
  • Install the new oxygen sensor and tighten to the manufacturer’s specified torque (typically around 30 lb-ft).

4. Reconnect Battery and Clear Codes

  • Reconnect the battery terminals.
  • Use the OBD-II scanner to clear the P0135 code from the ECM.

5. Test Drive

  • Start the engine and allow it to reach operating temperature.
  • Conduct a test drive to monitor performance and ensure the check engine light does not reappear.

Verification

After completing the repair, verify that the issue has been resolved:

  • ✓Test the affected component to ensure it functions correctly
  • ✓Check for any error codes or warning lights
  • ✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

  • •Follow the manufacturer's recommended maintenance schedule
  • •Address warning signs early before they develop into major issues
  • •Use quality parts and fluids recommended for your vehicle
  • •Keep detailed records of all repairs and maintenance

Tools & Equipment Required

  • •OBD-II scanner
  • •Multimeter
  • •Socket set
  • •Torque wrench

Parts Required

  • •Oxygen sensor (Bank 1 Sensor 1)
  • •Electrical contact cleaner

Additional Information

Error Code
P0135
Affected Component
Exhaust System
Estimated Time
1-2 hours
Difficulty
medium
Severity
medium
Tools Required
4 items
Parts Required
2 items

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