OBD Guide
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P16B8

Engine Control Module Self-Test Torque Converter Clutch Monitoring Fault

P16B8 is an OBD-II diagnostic trouble code meaning: Engine Control Module Self-Test Torque Converter Clutch Monitoring Fault. Common causes: malfunction of the gas turbine engine blocking clutch, problems with lockout control solenoid valve. Estimated repair cost: $33–167.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$33–167 (est.)

Symptoms

  • Check Engine light comes on
  • Deterioration in acceleration dynamics
  • Increased fuel consumption
  • Jerks when shifting gears
  • The car may not shift into higher gears

Causes

  • Malfunction of the gas turbine engine blocking clutch
  • Problems with lockout control solenoid valve
  • Open or short circuit in control circuit
  • Low or contaminated transmission fluid
  • Malfunction of the engine ECU or automatic transmission

How to Fix

  1. Check the level and condition of the transmission fluid
  2. Diagnose the operation of the lock control solenoid valve
  3. Check the integrity of the wiring harness to the locking clutch
  4. Scan the automatic transmission ECU for additional errors
  5. If necessary, replace the gas turbine engine blocking clutch

Related codes

P0740P0741P2769

FAQ

What does the P16B8 code mean?

P16B8 is an OBD-II diagnostic trouble code that indicates: Engine Control Module Self-Test Torque Converter Clutch Monitoring Fault

What causes a P16B8 error code?

The most common causes of P16B8 include: Malfunction of the gas turbine engine blocking clutch; Problems with lockout control solenoid valve; Open or short circuit in control circuit; Low or contaminated transmission fluid.

How do I fix a P16B8 diagnostic trouble code?

To fix P16B8: Check the level and condition of the transmission fluid. Diagnose the operation of the lock control solenoid valve. Check the integrity of the wiring harness to the locking clutch. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P16B8?

Yes, but get it checked soon

How much does it cost to fix P16B8?

The estimated repair cost for P16B8 is $33–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat