Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2003 Volvo C70 2.3 53, StandardFACTORY OEM SERVICE PROCEDURE
Transmission Control Module (TCM) Diagnostic Trouble Code (DTC) Diagnostics - 2 Of 3 (Convertible)
- TCM-0027 Back-Up (Reverse) Gear. Incorrect Gear Ratio (Aw55-50/51SN;2001-2004)
- Diagnostic trouble code (DTC) information
- Incorrect gear ratios
- Check the control module version and transmission
- Ordering software
- Programming the control module
- Checking the gear position sensor adjustment
- Checking noise from the transmission
- Checking solenoid S4
- Checking contact resistance and oxidation
- Test running the transmission
- Replacing the transmission
- Verification
- Information
- TCM-0027 Back-Up (Reverse) Gear. Incorrect Gear Ratio (B5234T3, Aw50-42;B5254T, Aw50-42;1999)
- Diagnostic trouble code (DTC) information
- Incorrect gear ratio
- Checking noise in the transmission
- Checking the oil quality and the oil level in the transmission
- Checking the transmission control module (TCM) and transmission version
- Checking the adjustment of the gear-shift position sensor
- Checking the resistance in the circuits for solenoid S1 and S2
- Test driving
- Replacing the transmission
- Ordering software
- Programming the control module
- Checking for contact resistance and oxidation
- Fault-tracing information
- Resetting Transmission fluid change counter
- Resetting the adaptation
- Verification
- Information
- TCM-0028 1ST Gear. Incorrect Gear Ratio (Aw50-42;2000)
- TCM-0028 1ST Gear. Incorrect Gear Ratio (Aw55-50/51SN;2001-2004)
- Diagnostic trouble code (DTC) information
- Incorrect gear ratio
- TCM-0028 1ST Gear. Incorrect Gear Ratio (B5234T3, Aw50-42;B5254T, Aw50-42;1999)
- TCM-0029 2ND Gear. Incorrect Gear Ratio (Aw50-42;2000)
- TCM-0029 2ND Gear. Incorrect Gear Ratio (Aw55-50/51SN;2001-2004)
- TCM-0029 2ND Gear. Incorrect Gear Ratio (B5234T3, Aw50-42;B5254T, Aw50-42;1999)
- TCM-002A 3RD Gear. Incorrect Gear Ratio (Aw50-42;2000)
- TCM-002A 3RD Gear. Incorrect Gear Ratio (Aw55-50/51SN;2001-2004)
- TCM-002A 3RD Gear. Incorrect Gear Ratio (B5234T3, Aw50-42;B5254T, Aw50-42;1999)
- TCM-002B 4TH Gear. Incorrect Gear Ratio (Aw50-42;2000)
- TCM-002B 4TH Gear. Incorrect Gear Ratio (Aw55-50/51SN;2001-2004)
- TCM-002B 4TH Gear. Incorrect Gear Ratio (B5234T3, Aw50-42;B5254T, Aw50-42;1999)
- TCM-002C 5TH Gear. Incorrect Gear Ratio (Aw55-50/51SN;2001-2004)
- TCM-002E Lock-Up. Transmission Judder In Lock-Up (Aw55-50/51SN;2001-2004)
- TCM-002F Lock-Up Function. Slipping Or Not Engaged (Aw50-42;2000)
- Diagnostic trouble code (DTC) information
- Slipping or not engaged
- TCM-002F Lock-Up Function. Slipping Or Not Engaged (Aw55-50/51SN;2001-2004)
- TCM-002F Lock-Up Function. Slipping Or Not Engaged (B5234T3, Aw50-42;B5254T, Aw50-42;1999)
- TCM-0039 Gear-Shift Position Sensor. Faulty Signal (Aw50-42;2000)
- TCM-0039 Gear-Shift Position Sensor. Faulty Signal (Aw55-50/51SN;2001-2004)
- TCM-0039 Gear-Shift Position Sensor. Faulty Signal (B5234T3, Aw50-42;B5254T, Aw50-42;1999)
- TCM-0042 Oil Temperature. Temperature Too High (Aw50-42;2000)
- TCM-0042 Oil Temperature. Temperature Too High (Aw55-50/51SN;2001-2004)
- TCM-0042 Oil Temperature. Temperature Too High (B5234T3, Aw50-42;B5254T, Aw50-42;1999)
- TCM-0043 Oil Temperature Sensor. Signal Too Low (Aw50-42;2000)
- TCM-0043 Oil Temperature Sensor. Signal Too Low (Aw55-50/51SN;2001-2004)
- TCM-0043 Oil Temperature Sensor. Signal Too Low (B5234T3, Aw50-42;B5254T, Aw50-42;1999)
- TCM-0044 Oil Temperature Sensor. Signal Too High (Aw50-42;2000)
- TCM-0044 Oil Temperature Sensor. Signal Too High (Aw55-50/51SN;2001-2004)
- TCM-0044 Oil Temperature Sensor. Signal Too High (B5234T3, Aw50-42;B5254T, Aw50-42;1999)
- TCM-0045 Oil Temperature Sensor. Faulty Signal (Aw50-42;2000)
- TCM-0045 Oil Temperature Sensor. Faulty Signal (Aw55-50/51SN;2001-2004)
- TCM-0045 Oil Temperature Sensor. Faulty Signal (B5234T3, Aw50-42;B5254T, Aw50-42;1999)
- TCM-0046 Oil Temperature. Oil Temperature Too High (Aw50-42;2000)
- TCM-0046 Oil Temperature. Oil Temperature Too High (Aw55-50/51SN;2001-2004)
- TCM-0048 Control Module. Faulty Software (Aw50-42;2000)
- TCM-0048 Control Module. Faulty Software (Aw55-50/51SN;2001-2004)
- TCM-0049 Control Module. Internal Fault. Intermittent Fault (Aw50-42;2000)
- TCM-0049 Control Module. Internal Fault. Intermittent Fault (Aw55-50/51SN;2001-2004)
- TCM-0049 Control Module. Internal Fault. Intermittent Fault (B5234T3, Aw50-42;B5254T, Aw50-42;1999)
- TCM-0049 Control Module. Internal Fault. Permanent Fault (Aw50-42;2000)
- TCM-0049 Control Module. Internal Fault. Permanent Fault (Aw55-50/51SN;2001-2004)
- TCM-0049 Control Module. Internal Fault. Permanent Fault (B5234T3, Aw50-42;B5254T, Aw50-42;1999)
- TCM-0060 Control Module. Internal Fault (Aw55-50/51SN;2001-2004)
- TCM-0081 Vehicle Speed Sensor. Signal Too High (Aw50-42;2000)
- TCM-0081 Vehicle Speed Sensor. Signal Too High (Aw55-50/51SN;2001-2004)
- TCM-0081 Vehicle Speed Sensor. Signal Too High (B5234T3, Aw50-42;B5254T, Aw50-42;1999)
- TCM-0083 Vehicle Speed Sensor. Signal Too Low (Aw50-42;2000)
- TCM-0083 Vehicle Speed Sensor. Signal Too Low (Aw55-50/51SN;2001-2004)
- TCM-0083 Vehicle Speed Sensor. Signal Too Low (B5234T3, Aw50-42;B5254T, Aw50-42;1999)
- TCM-0087 Engine Speed (Rpm) Sensor. Signal Too High (Aw55-50/51SN;2001-2004)
- TCM-0087 Input Speed Sensor. Signal Too High (Aw50-42;2000)
- TCM-0087 Input Speed Sensor. Signal Too High (B5234T3, Aw50-42;B5254T, Aw50-42;1999)
- TCM-0089 Engine Speed (Rpm) Sensor. Signal Too Low (Aw55-50/51SN;2001-2004)
- TCM-0089 Input Speed Sensor. Signal Too Low (Aw50-42;2000)
- TCM-0089 Input Speed Sensor. Signal Too Low (B5234T3, Aw50-42;B5254T, Aw50-42;1999)
- TCM-009A Battery Voltage. Signal Too Low (Aw50-42;2000)
- TCM-009A Battery Voltage. Signal Too Low (Aw55-50/51SN;2001-2004)
- TCM-009A Battery Voltage. Signal Too Low (B5234T3, Aw50-42;B5254T, Aw50-42;1999)
- TCM-0100 Poor Gear Shifting Quality (Aw55-50/51SN;2001-2004)
- TCM-0109 Shift Solenoid S4. Signal Too Low (Aw55-50/51SN;2001-2004)
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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