Anyone know what or where this is. My truck has been poorly for weeks and has me clueless. It keeps reving up and down on its own, the check light flashes on and off and chuffs out black and grey smoke. Have checked all the vacuum hoses changed the throttle posistion sensor and checked all the electrical sockets. Have now checked the fault codes and is throwing up No 11 which is Switch sign ( vehicle not in p or n or a/c on) any ideas anyone.
Steve.
Steve.
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