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Tranny some times stuck in low gear. Codes P0700, P0870

 
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Old 26 Nov 2017, 08:16 pm
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Default Tranny some times stuck in low gear. Codes P0700, P0870

As stated some times I start car and pull out of driveway and it will not shift out of low. Shut it off and sometimes starts working fine. Getting codes P0700, Control System and P0870, OD Pressure Switch Circuit. Do I need input and output speed sensors? Transmission Module? Or all three.
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Old 26 Nov 2017, 09:02 pm
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Location: Thousand Oaks, CA
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Default Re: Tranny some times stuck in low gear. Codes P0700, P0870

P0870 - A/T Hydraulic Pressure Line Malfunction

Trouble Code Conditions: Engine started; vehicle driven at over 1000 rpm, then immediately after a shift, the PCM detected a malfunction in one or more of the Pressure Switch circuits (it detected the switch did not close twice). DTC P0944 may be present.

Possible Causes:

1. Check for related line pressure trouble codes
2. Check for related speed ratio and pressure switch codes
3. 5v supply circuit is open or is shorted to ground
4. Transmission Control Relay output circuit is open
5. OD Pressure Switch sense circuit is shorted to ground or to voltage
6. Excessive debris in the oil pan
7. Line pressure Sensor connector is loose or damaged
8. Oil pressure switch is damaged or has failed
9. Intermittent wiring or connector problems exist
10. PCM or TCM has failed

One member was able to fix this P0870 on his 2003 Pt Cruiser with a new automatic transmission control solenoid.
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Last edited by ptcruisersteve; 26 Nov 2017 at 09:04 pm.
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