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2007 Dodge Caliber P0700 P161B P168B: Causes, Diagnosis & Fix Guide

Model: 2007 dodge caliber Fault Code: P0700 Posted: 2016-07-13 13:41

I recently purchased a 2007 Dodge Caliber and am encountering persistent P0700, P161B, and P168B diagnostic codes. I'm wondering if using the wrong tire size could be causing the P0700 code. After disconnecting the battery for over 24 hours, the code returns during normal driving cycles. As a new owner of this CVT transmission vehicle, I'm seeking reliable troubleshooting steps. Any insights into these specific codes and how to resolve them would be greatly appreciated.

Related fault codes
P0700
Comments (5)
Anonymous 2016-07-13 14:49

P0700 is a generic transmission code indicating an issue with the transmission control system. To troubleshoot effectively, ensure you have a scanner capable of reading all vehicle-specific codes. First, check the transmission fuses in the TIPM (Terminal Interface Power Module). The owner's manual lists fuses #8, #17, and #4 as critical for transmission operation.

Anonymous 2016-07-14 16:58

I use an Autel 80-2 all-system scanner. I've already checked the transmission fuses—no issues found. Now I'm seeing P161B in addition to P0700. I also tested for a stuck engine timer, which pointed toward low battery voltage at the PCM. While this may be relevant, I'm still uncertain if it's the root cause. Next step is to inspect all power and ground connections to the PCM thoroughly—this is outside my comfort zone but seems like a logical path.

Anonymous 2016-07-15 15:07

kev2 wrote: P0700 is a generic transmission code... check fuses in TIPM (fuses #8, #17, #4). I have an Autel 802 all-system scanner. Fuses are fine. Now I'm seeing P168B as well. I’m currently checking power and ground connections for both the ECM and TCM. Could a power or grounding issue be responsible? If not, a TCM recalibration might be needed.

Anonymous 2016-07-15 15:31

P161B typically indicates a problem with TCM power supply. The TIPM (Terminal Interface Power Module) is known to have reliability issues in some 2007 Dodge Caliber models and may require a professional diagnostic tool and full diagnostic tree analysis. Has the TCM been flashed, replaced, or disconnected with the ignition in 'On' or 'Accessory' position? If yes: Cycle the ignition off for 4 seconds, then turn it back on. Erase DTCs and repeat the cycle. After restarting, read TCM codes again. - If the code resets and remains active — proceed to perform the CVT Transmission Verification Test (refer to DTC-Based Diagnostics/Module: Transmission Control (TCM) - Standard Procedure). - If the code does not reset — inspect TCM terminals for corrosion, damage, or loose connections. Pay close attention to power and ground circuits. Note: Loss of TCM Fused B(+), TCM ground, or transmission output circuits can trigger this fault. Check for any applicable service bulletins. If no issues are found, replace and reprogram the TCM per factory service procedures. Then perform the CVT Transmission Verification Test.

Anonymous 2016-07-15 16:46

The alternator was replaced before I owned the vehicle, and I disconnected the battery once due to a brake light issue—this is when P168B appeared. It's possible that this action triggered or worsened the fault. I will now follow your suggested reset procedure and report back with results. Thanks for the guidance, kev2.