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Dodge 2008 Avenger Won't Shift Out of 1st Gear with P0700 Transmission Code

Model: car Fault Code: P0700 Posted: 2016-10-03 14:02

I'm experiencing a transmission issue on my 2008 Dodge Avenger. The vehicle will not shift from 1st gear to Drive, and the onboard diagnostic system has detected a generic transmission code: P0700. I initially noticed that cruise control stopped working, which led me to check for fault codes. The scan indicated a faulty output speed sensor (OSS), so I replaced both the output and input speed sensors. After the replacement, the vehicle still fails to shift out of 1st gear, though other transmission functions appear normal. I'm concerned that P0700 is a generic code and may indicate deeper transmission issues — it's possible there are additional fault codes present. I've confirmed the issue with a scan tool, but I'm not sure if the sensor replacements resolved the root cause. Could this be related to wiring or signal voltage issues in the TIPM (Transmission Integrated Power Module)? I'd appreciate advice on how to properly diagnose and fix this problem using a reliable scanner and diagnostic tools.

Related fault codes
P0700
Comments (3)
Anonymous 2016-10-03 14:50

This sounds like a 2008 Dodge Avenger. Could you confirm the exact model year and engine type (e.g., 2.4L)? Are there any other symptoms, such as check engine light or transmission hesitation? Note: P0700 is a generic transmission code — it often masks underlying issues. Always perform a full system scan to identify all related codes. Do not rely on key tricks or temporary fixes; proper diagnostics are essential.

Anonymous 2016-10-04 04:56

Yes, it's a 2008 Dodge Avenger with a 2.4L engine. The cruise control stopped working first, and the scan showed a faulty output speed sensor (OSS). I replaced both the output and input speed sensors, but the vehicle still won't shift out of 1st gear — all other transmission functions work normally. I suspect that the P0700 code may not have been triggered by a direct sensor fault. It's possible there's an underlying wiring or signal issue in the TIPM or transmission control module.

Anonymous 2016-10-04 07:53

Could you confirm which engine variant — specifically, is it the 2.4L four-cylinder? What specific code prompted the replacement of the output speed sensor? I'm not aware of any P0700-related code that directly states a sensor failure. Are you using an OBD2 scanner to read codes? To troubleshoot further, consider checking the signal voltage from the OSS and TIPM with a digital multimeter (DVOM) and refer to the wiring diagrams. This can help identify if there's a broken connection or weak signal. More details: https://www.revbase.com/BBBMotor/Wd/DownLoad?ID=156833