AutoCodes – Chrysler – P0870 Chrysler

P0870 Chrysler Code - OD Hydraulic Pressure Test

Quick Answer

Pressure switches are normally off or open (no pressure applied) and read high (+12 volts). Common causes include Faulty OD Hydraulic Pressure Switch, OD Hydraulic Pressure Switch harness is open or shorted, OD Hydraulic Pressure Switch circuit poor electrical connection. 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: P0870 Chrysler indicates OD Hydraulic Pressure Test.
Common causes: Common causes include Faulty OD Hydraulic Pressure Switch, OD Hydraulic Pressure Switch harness is open or shorted, OD Hydraulic Pressure Switch circuit poor electrical connection.
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.

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Code Popularity 1,124

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 06, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0870 Chrysler Description

Pressure switches are normally off or open (no pressure applied) and read high (+12 volts). When an element is applied, the corresponding pressure switch closes to ground (0 volts) or turns on. The controller tests the OD and 2/4 pressure switches when they are off (when the corresponding friction element is not applied) by briefly applying the OD and 2/4 elements which will cause the corresponding pressure switch to close. The test verifies that the switches are operational and that the switch will close when the corresponding element is applied. If a switch fails to respond, it is re-tested. The MIL illuminates and the transmission system defaults to Limp-in mode.
After a shift into a forward gear, with engine speed greater than 1000 RPM, the PCM momentarily turns on element pressure to the clutch circuits that don't have pressure to identify the correct pressure switch closes. If the pressure switch does not close 2 times the Diagnostic Trouble Code (DTC) sets.

OBDII Code P0870 Chrysler - OD Hydraulic Pressure Test - AutoCodes.com — P0870 Chrysler Code - OD Hydraulic Pressure Test

What does this mean?

What are the Possible Causes of the DTC P0870 Chrysler?

Faulty OD Hydraulic Pressure Switch
OD Hydraulic Pressure Switch harness is open or shorted
OD Hydraulic Pressure Switch circuit poor electrical connection
Faulty Powertrain Control Module (PCM)
Internal transmission problem

How to Fix the DTC P0870 Chrysler?

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 P0870 Chrysler 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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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0870 Chrysler Code

1. What is OBDII code P0870 in a Chrysler vehicle?

- OBDII code P0870 in a Chrysler vehicle indicates a problem with the hydraulic pressure in the transmission.

2. What are the common symptoms of OBDII code P0870 in a Chrysler vehicle?

- Common symptoms of OBDII code P0870 include harsh shifting, transmission slipping, and decreased fuel efficiency.

3. What are the possible causes of OBDII code P0870 in a Chrysler vehicle?

- Possible causes of OBDII code P0870 include low transmission fluid levels, a faulty transmission pump, or a malfunctioning pressure control solenoid.

4. How can I diagnose OBDII code P0870 in a Chrysler vehicle?

- Diagnosing OBDII code P0870 typically involves performing a hydraulic pressure test on the transmission to check for proper pressure levels.

5. What is the recommended repair for OBDII code P0870 in a Chrysler vehicle?

- The recommended repair for OBDII code P0870 usually involves inspecting and repairing any transmission fluid leaks, replacing the transmission pump, or repairing/replacing the pressure control solenoid.

6. Can I continue driving my Chrysler vehicle with OBDII code P0870?

- It is not recommended to drive your Chrysler vehicle with OBDII code P0870 as it can lead to further damage to the transmission if left untreated.

7. How much does it typically cost to repair OBDII code P0870 in a Chrysler vehicle?

- The cost to repair OBDII code P0870 in a Chrysler vehicle can vary depending on the specific cause of the issue, but it typically ranges from $300 to $800.

8. Will resetting the OBDII code P0870 in my Chrysler vehicle make the problem go away?

- Resetting the OBDII code P0870 may temporarily clear the warning light, but the underlying issue causing the code will still need to be diagnosed and repaired.

9. Are there any preventive measures to avoid OBDII code P0870 in a Chrysler vehicle?

- To prevent OBDII code P0870, it is important to regularly check and maintain proper transmission fluid levels, address any leaks promptly, and follow the manufacturer's recommended service schedule.

10. Can a DIY enthusiast perform the repair for OBDII code P0870 in a Chrysler vehicle?

- Repairing OBDII code P0870 may require specialized tools and knowledge of transmission systems, so it is recommended to consult a professional mechanic for proper diagnosis and repair.